Focus

Cortexin

Cortexin is a polypeptide preparation made from the cerebral cortex of cattle, consisting of a mixture of low-molecular-weight peptides, amino acids, and trace elements. Marketed as a neuroprotective and nootropic medicine, it is registered and prescribed mainly in Russia and other post-Soviet countries, where it is given by intramuscular injection for stroke recovery, cognitive disorders, and other neurological conditions. It is not approved by Western drug regulators, and most clinical evidence for it comes from Russian-language literature.

Modafiendz

Modafiendz is a fluorinated, N-methylated analog of the wakefulness agent modafinil, marketed online as a next-generation nootropic alternative. It is built around the same eugeroic blueprint that made modafinil a favorite for focus and sustained alertness, with structural tweaks intended to modify its activity. Because the analog itself has not been formally studied, it is best understood as an experimental research chemical riding on the well-mapped pharmacology of its parent.

Paraxanthine

Paraxanthine is what caffeine mostly becomes. Around 70 to 80 percent of a caffeine dose is converted by the liver enzyme CYP1A2 into paraxanthine, so for most of the time a coffee is working, the compound doing the work is this one [14]. Selling it directly is an attempt to skip a step that varies enormously between people: CYP1A2 activity differs several-fold across individuals, which is a large part of why the same espresso is pleasant for one person and unpleasant for another. Human trials are small but real, and they point at improved cognition at modest doses with less of the sleep disruption caffeine causes [4][6]. It is the most credible caffeine alternative on this site, and the evidence base behind it is still thin and largely tied to the company selling it.

Phenylalanine

Phenylalanine is an essential amino acid and the first step in making dopamine and noradrenaline: the body converts it to tyrosine, tyrosine to L-DOPA, and L-DOPA to dopamine. That chain is the entire basis for taking it, and it is also the reason to be measured about it, because supplying more of the first ingredient does not reliably speed up a pathway that is regulated further downstream. The best-supported use is not mood at all; L-phenylalanine combined with light therapy has a real if modest evidence base in vitiligo [9][10]. The critical safety fact is short and absolute: anyone with phenylketonuria must not take it [7].

Sabroxy

Oroxylin A is a plant flavonoid from the bark of the Indian trumpet tree (Oroxylum indicum) and from Chinese skullcap; consumers almost never buy the pure compound, they buy Sabroxy, a standardised bark extract in which oroxylin A is one of three flavonoids. It is marketed for memory and focus, and the animal work points to two mechanisms: it blocks the benzodiazepine site on the GABA-A receptor, releasing the brain's main braking signal, and it slows dopamine reuptake in roughly the way ADHD stimulants do. Human evidence is thin and rests on a single 12-week trial in 82 older adults with memory complaints; that trial was paid for by the ingredient's manufacturer, had a company founder as a co-author, found gains on some memory tasks but not most other measures, and applied no statistical correction for testing many outcomes at once. A separate Phase I study showed pure oroxylin A is tolerated up to 2400 mg in healthy volunteers, but no trial has ever shown the pure compound improves cognition in people.

Taltirelin

Taltirelin (TA-0910, brand name Ceredist) is a synthetic, metabolically stable analog of thyrotropin-releasing hormone (TRH), the three-residue hypothalamic peptide. It was developed by Tanabe Seiyaku and approved in Japan in 2000 for spinocerebellar degeneration, where it is taken orally to help with ataxia and related symptoms. The interesting thing about taltirelin is that it was engineered to keep the central nervous system effects of TRH while shedding most of the hormonal ones; it is roughly 10 to 100 times more potent than native TRH at driving CNS arousal, yet its effect on thyroid hormone release is much weaker. It also lasts far longer in the body because it resists the enzymes that chew up natural TRH within minutes. Outside its approved use it gets discussed in nootropic and biohacker circles as a wakefulness-promoting, pro-cholinergic "analeptic" and neuroprotective agent, and there is a real preclinical literature behind those claims (Parkinson's models, ischemia, pain, respiratory stimulation). Human data outside spinocerebellar degeneration is thin, so most of what you read about it as a cognitive enhancer is extrapolation from animal work.

ISRIB

ISRIB is an experimental laboratory compound that switches off a cellular alarm system called the integrated stress response; that alarm normally slows a cell's protein production when the cell is under strain. It works by clamping a protein machine called eIF2B into its active shape, which lets brain cells resume making the new proteins that forming a memory depends on. In mice and rats it speeds learning, restores memory weeks after a head injury, and reverses some age-related memory loss, at doses well under a milligram per kilogram. All of that evidence comes from cells and rodents; ISRIB has never been given to a person in a registered clinical trial, so there is no human dose, no human safety record, and no evidence it does anything in people.

MNT (pmp)

MNT (PMP) is a combination injectable and pre-workout formula that pairs nitric oxide precursors with a focused cognitive stack in a single shot. Arginine, citrulline, and the arginase inhibitor norvaline drive vasodilation and blood flow for a stronger pump, while citicoline, N-acetyl-L-tyrosine, and trimethylglycine sharpen focus and support drive under load. It is engineered as a two-in-one performance blend that delivers physical pump and mental clarity together.

American Ginseng

American ginseng (Panax quinquefolius) is a slow-growing perennial herb of the ivy family, native to the hardwood forests of eastern North America and prized for its aromatic root. It has been harvested and traded for centuries, especially for export to East Asia, where it is used in traditional medicine and valued as a tonic distinct in character from Asian ginseng. Its roots contain ginsenosides, and modern research has examined it for effects on blood sugar, cognition, cancer-related fatigue, and the common cold [1][2].

Cardiovascular

Flecainide

Flecainide is a prescription Class Ic antiarrhythmic best known for suppressing ventricular and supraventricular arrhythmias, but it is featured here through an unconventional cognition and neuroprotection lens rather than its approved cardiac indication. The scientific hook is that flecainide, in addition to blocking the cardiac sodium channel, directly stabilizes the ryanodine receptor RyR2 and suppresses pathological intracellular calcium leak; the same RyR2 calcium leak has been implicated in neuronal dysfunction, tau pathology, and cognitive impairment in Alzheimer's models and in heart failure associated cognitive decline. A separate line of work shows that sodium channel blockade with flecainide protects axons from degeneration in neuroinflammatory models, which is a distinct neuroprotective rationale. Some users additionally pair a low dose antiarrhythmic with stimulants used for focus, reasoning that stimulants raise heart rate and arrhythmia risk while flecainide has proven antiarrhythmic action; this pairing is a theoretical, off label rationale rather than an established protocol. It is essential to be clear that human cognitive enhancement evidence for flecainide is preclinical or theoretical, and that flecainide remains a potent cardiac drug with a documented proarrhythmic risk in people with structural heart disease.

Forskolin

Forskolin is a natural compound belonging to the labdane diterpenes, extracted from the roots of the Indian coleus plant (Plectranthus barbatus, also known as Coleus forskohlii). It is best known in biology as a laboratory tool because it directly switches on the enzyme adenylyl cyclase, raising cellular levels of the messenger molecule cAMP. The plant has a history in traditional Ayurvedic medicine, and forskolin is also sold as a dietary supplement, often marketed for weight loss, though the evidence for that use is weak. In research it is prized for its ability to raise cAMP in almost any cell without needing a specific receptor.

Iron

Iron is an essential mineral that every cell in the body needs, most famously as the core of hemoglobin, the protein in red blood cells that carries oxygen from the lungs to the tissues. It also forms part of myoglobin in muscle and of many enzymes involved in energy production and DNA synthesis. Iron deficiency is the most common nutritional deficiency in the world and the leading cause of anemia, while too much iron can be toxic, so the body tightly regulates how much it absorbs and stores.

Iron Bisglycinate

Iron bisglycinate, also called ferrous bisglycinate, is a form of dietary iron in which the iron is chemically bound, or chelated, to two molecules of the amino acid glycine. It is used as an oral iron supplement and in food fortification to prevent and treat iron deficiency, and it is often promoted as being better absorbed and gentler on the stomach than conventional iron salts such as ferrous sulfate. It is a chelated amino acid iron compound rather than a distinct drug.

Lutein

Lutein is a yellow xanthophyll carotenoid found in dark leafy greens, corn, and egg yolks. In the body it concentrates in the macula of the retina, where together with zeaxanthin it forms the macular pigment, and it is also selectively taken up into the brain by the carrier protein StARD3; macular pigment density has been found to correlate with lutein concentrations in the occipital cortex, so retinal measurements can serve as a non-invasive index of brain lutein. It is studied mainly in relation to eye health and, more tentatively, cognition, and is used as a dietary supplement and, in some regions, as the food colorant E161b.

Dopaminergic

Mucuna Pruriens

Mucuna pruriens, commonly called velvet bean or cowhage, is a tropical climbing legume of the family Fabaceae whose seeds are a rich natural source of levodopa (L-DOPA), the precursor of the neurotransmitter dopamine. Long used in Ayurvedic medicine, its seed extracts are marketed as dietary supplements and have been studied as a plant-based option in Parkinson disease. The plant is also notorious for the fine hairs on its pods, which cause intense itching on contact with skin.

N-Acetyl L-Tyrosine (NALT)

N-Acetyl L-Tyrosine (NALT) is an acetylated, more water-soluble form of the amino acid L-tyrosine, originally introduced as a tyrosine source for intravenous nutrition. It is widely marketed as a nootropic on the premise that tyrosine is the precursor of the catecholamine neurotransmitters dopamine and norepinephrine. However, human and animal studies indicate that N-Acetyl L-Tyrosine is converted to free tyrosine inefficiently, with much of an infused dose excreted unchanged in the urine.

Phenylpiracetam Hydrazide

Phenylpiracetam Hydrazide (fonturacetam hydrazide) is a structural variant of phenylpiracetam in which the racetam's amide group is replaced by a hydrazide, marketed as a next-generation twist on one of the most potent racetam nootropics [4]. Its appeal rests on the phenylpiracetam framework, a scaffold known for selective dopamine transporter inhibition and stimulant-like focus, endurance, and cold resistance [2][5]. It is sold strictly as a research chemical, and its own pharmacology has not been characterized in published human or animal studies, so its profile is inferred from the phenylpiracetam parent it is built upon [3][4].

Piritinol

Piritinol, also spelled pyritinol and known as pyrithioxine, is a semisynthetic derivative of vitamin B6 (pyridoxine) that has been used as a nootropic and cerebral-function agent since the 1960s. It is built from two pyridoxine molecules linked by a disulfide bridge, a change that alters how the molecule behaves compared with the parent vitamin. In several European countries it is prescribed for chronic cognitive impairment and as supportive care after head trauma, and it has also been sold as a dietary supplement in some markets.

Rosemary Extract

Rosemary extract is a concentrated preparation of the culinary herb Rosmarinus officinalis (now often classed as Salvia rosmarinus). Its active fraction is dominated by two polyphenols; carnosic acid, a fat-soluble diterpene that activates the body's own antioxidant defenses, and rosmarinic acid, a water-soluble caffeic acid ester. The plant's volatile oil also carries 1,8-cineole, the aromatic component tied to rosemary's cognitive reputation. It's studied mostly for memory support, antioxidant activity, and mild mood effects.

Selank + Semax

Selank + Semax is a nasal spray pairing two Russian research peptides that are normally sold on their own. Selank is a synthetic relative of the immune peptide tuftsin, studied in Russia as an anxiolytic that does not sedate and does not appear to produce the tolerance or withdrawal that benzodiazepines do. Semax is a shortened fragment of ACTH, cut so that it keeps the behavioural effects without the hormonal ones, and studied for attention, stroke recovery and neuroprotection. Both are reported to raise BDNF, and that shared thread is the usual argument for combining them: one takes the edge off, the other sharpens.

Theacrine

Theacrine is a naturally occurring purine alkaloid, chemically 1,3,7,9-tetramethyluric acid, that is closely related to caffeine and found in the leaves of kucha tea (Camellia assamica var. kucha) and in the cupuacu fruit. It has stimulant-like properties and, like caffeine, acts on adenosine and dopamine signaling to influence energy, alertness, and locomotor activity [1]. Sold as a dietary supplement, often under the trade name TeaCrine, it has drawn attention as a longer-acting alternative to caffeine that appears less prone to tolerance with repeated use [2].

Stimulant

Theobromine

Theobromine is a bitter methylxanthine alkaloid and the principal stimulant compound of the cacao plant (Theobroma cacao), giving chocolate and cocoa much of their mild pharmacological activity. Chemically it is 3,7-dimethylxanthine, an isomer of theophylline and a close relative of caffeine, and it also forms in the human body as a major breakdown product of caffeine [1][3]. It has gentle effects on the heart, blood vessels, airways, and kidneys, and unlike caffeine produces little central-nervous-system stimulation; it is well tolerated in people but is toxic to dogs and some other animals [1].

Vitamin B Complex

Vitamin B complex is a collective term for the group of eight water-soluble B vitamins that act as coenzymes or coenzyme precursors throughout cellular metabolism. The group comprises thiamine (B1), riboflavin (B2), niacin (B3), pantothenic acid (B5), pyridoxine (B6), biotin (B7), folate (B9), and cobalamin (B12), each chemically distinct yet metabolically interrelated. Supplement products that combine all eight are marketed as vitamin B complex, and the vitamins occur together in foods such as meat, eggs, dairy, legumes, and whole grains.

Amphetamine

Amphetamine is a potent central nervous system stimulant and the parent compound of a broad family of related drugs. In medicine it is used chiefly to treat attention-deficit hyperactivity disorder (ADHD) and narcolepsy, where it improves attention, wakefulness, and impulse control by raising the brain's levels of the neurotransmitters dopamine and norepinephrine [1]. It also has a long history of recreational misuse and a potential for dependence, and it is tightly regulated as a controlled substance in most countries [1].

Dexmethylphenidate

Dexmethylphenidate is a central nervous system stimulant used to treat attention deficit hyperactivity disorder (ADHD). It is the more active of the two mirror-image forms of methylphenidate, specifically the d-threo enantiomer, and is sold under the brand name Focalin in immediate-release and extended-release forms. By blocking the reuptake of dopamine and norepinephrine, it raises the availability of these neurotransmitters in the brain. In the United States it is a Schedule II controlled substance available only by prescription.

Dextroamphetamine

Dextroamphetamine is a central nervous system stimulant and the more active of the two mirror-image forms of amphetamine. It is used mainly to treat attention deficit hyperactivity disorder (ADHD) and narcolepsy, and it forms the active component of several widely prescribed medicines, including Dexedrine, the mixed-salt product Adderall, and the prodrug lisdexamfetamine. The drug works by increasing the release and availability of the neurotransmitters dopamine and norepinephrine in the brain. Because it carries a risk of dependence and misuse, it is a Schedule II controlled substance in the United States.

ADHD

Guanfacine

Guanfacine is a non-stimulant ADHD medication and a selective alpha-2A adrenergic receptor agonist, sold as extended-release Intuniv for ADHD and immediate-release Tenex for high blood pressure. It has no dopaminergic reward action and no abuse potential, but it lowers blood pressure and heart rate and must never be stopped abruptly because of rebound hypertension.

Lisdexamfetamine

Lisdexamfetamine is a central nervous system stimulant used to treat attention-deficit hyperactivity disorder (ADHD) and moderate-to-severe binge eating disorder. It is a prodrug of dextroamphetamine, meaning it is inactive until the body converts it into the active stimulant, which gives it a smooth, long-lasting effect. Sold mainly under the brand name Vyvanse, it is a once-daily oral medicine and a controlled substance.

ADHD

Methamphetamine

Methamphetamine is a potent central nervous system stimulant of the substituted amphetamine class. Although it has a limited approved medical role in treating attention-deficit hyperactivity disorder and obesity, it is far better known as an illicitly manufactured drug of abuse, sold in crystalline form and taken for its intense euphoria and stimulation. Methamphetamine raises levels of the neurotransmitters dopamine, norepinephrine, and serotonin in the brain, and heavy use is strongly addictive and can damage dopamine-releasing nerve cells.

Methylphenidate

Methylphenidate is a central nervous system stimulant widely used to treat attention-deficit hyperactivity disorder (ADHD) and narcolepsy. Sold under brand names such as Ritalin and Concerta, it works by blocking the reuptake of the neurotransmitters dopamine and norepinephrine, raising their levels in the brain and improving attention and impulse control. First synthesized in the 1940s, it is one of the most commonly prescribed medications for ADHD and is a controlled substance because of its potential for misuse.

Serdexmethylphenidate

Serdexmethylphenidate is a prodrug of the stimulant dexmethylphenidate, created by attaching the amino acid serine to the active drug so that it is only slowly converted to its active form in the gastrointestinal tract. It is used to treat attention-deficit/hyperactivity disorder (ADHD) and is marketed in the United States as part of the combination capsule Azstarys, which pairs it with a small amount of immediate-release dexmethylphenidate. The prodrug design gives a rapid onset with an extended duration of effect and is intended to reduce the potential for misuse.

Viloxazine

Viloxazine, sold as extended-release Qelbree, is a non-stimulant ADHD medication approved for children, adolescents, and adults. It works mainly as a norepinephrine reuptake inhibitor with additional serotonergic modulation and is not a controlled substance; however, it carries an FDA boxed warning for suicidal thoughts and behaviors and is a strong CYP1A2 inhibitor with important drug interactions.

Allithiamine

Allithiamine is a naturally occurring, fat-soluble derivative of thiamine (vitamin B1) that was first discovered in garlic in the 1950s. It forms when a compound from crushed garlic reacts with thiamine, producing an open-ring thiamine disulfide that the body can absorb more readily than ordinary thiamine. It is the original member of a family of lipophilic thiamine derivatives, which also includes sulbutiamine and fursultiamine, developed to raise vitamin B1 levels more effectively than the standard vitamin.

Anxiolytic

Baicalein

Baicalein is a naturally occurring flavone, a type of flavonoid, best known as one of the principal active compounds in the root of Baikal skullcap (Scutellaria baicalensis), a herb long used in traditional Chinese medicine. Chemically it is the aglycone of baicalin, meaning baicalin is its sugar-bearing form, and the two interconvert in the body. Laboratory and animal research has explored baicalein for antioxidant, anti-inflammatory, and neuroprotective effects, though it is not an approved medicine.

Celastrus Paniculatus

Celastrus paniculatus is a woody climbing shrub of the family Celastraceae, native to India and known in English as the intellect tree or black oil plant [1][2]. Its seeds and the oil pressed from them have a long history in Ayurvedic, Unani, and Siddha traditional medicine, where they are counted among the memory-supporting 'Medhya Rasayana' tonics and used for a range of nervous-system complaints [2][3]. Modern laboratory and animal studies have examined the seed oil and extracts for antioxidant, neuroprotective, and nootropic activity, though controlled human trials are lacking [2][4].

Centanafadine

A once-daily reuptake inhibitor of norepinephrine, dopamine and serotonin, approved July 2026 for ADHD in adults and children aged 6 and older.

Cerebroprotein Hydrolysate

Cerebroprotein hydrolysate is a mixture of low-molecular-weight peptides and free amino acids extracted from porcine brain tissue and used as a neuroprotective preparation, chiefly for cognitive impairment and dementia [2][4]. It is closely related to Cerebrolysin, a similarly prepared brain peptide product, and is marketed mainly in China and other parts of Asia rather than in Western countries [1][3]. Laboratory and animal studies attribute neurotrophic and antioxidant actions to the preparation, though rigorous human evidence remains limited [2][4].

Ginseng

Ginseng is the fleshy root of several slow-growing perennial plants in the genus Panax, part of the ivy family Araliaceae, and it is among the most widely used herbs in traditional East Asian medicine. The best known species are Asian ginseng (Panax ginseng) and American ginseng (Panax quinquefolius), both valued for a group of active saponins called ginsenosides. Ginseng is taken as a general tonic and is marketed to support energy, cognition, and resilience to stress, although clinical evidence for these uses is mixed.

Kaempferol

Kaempferol is a naturally occurring flavonoid, specifically a flavonol, found widely across the plant kingdom and in many common foods such as kale, broccoli, onions, tea, and berries. Chemically it is a yellow crystalline solid known as 3,4',5,7-tetrahydroxyflavone, and it is one of the main flavonols in the human diet [1]. It has been studied extensively in the laboratory for antioxidant, anti-inflammatory, and other biological activities [1][2].

L-DOPA

L-DOPA, also called levodopa, is a naturally occurring amino acid that serves as the immediate precursor to the catecholamine neurotransmitters dopamine, norepinephrine, and epinephrine. Unlike dopamine itself, it can cross the blood-brain barrier, where enzymes convert it into dopamine, which is why it became the cornerstone drug for treating Parkinson's disease. It occurs in nature in certain legumes, most notably the velvet bean Mucuna pruriens, and is usually given together with an enzyme inhibitor such as carbidopa to improve its delivery to the brain.

L-Threonic Acid

L-Threonic acid is a four-carbon sugar acid and a natural metabolite of ascorbic acid, better known as vitamin C. On its own it has drawn little study, but its magnesium salt, magnesium L-threonate, has become a focus of research because it can raise magnesium levels in the brain. Sold as the branded ingredient Magtein, magnesium L-threonate is marketed as a supplement aimed at memory and cognition, and threonate has separately been examined in laboratory work on hair biology.

Luteolin

Luteolin is a naturally occurring flavone, a subclass of flavonoid, that carries a yellow color and is present in many plants used as foods and herbs, including celery, parsley, thyme, chamomile, and oregano. It has been studied in the laboratory for antioxidant, anti-inflammatory, and anticancer activity, although solid human clinical evidence is limited. It was first isolated in 1829 from the dye plant Reseda luteola.

N-Acetyl Semax

N-Acetyl Semax is an acetylated analog of Semax, a synthetic heptapeptide with the sequence Met-Glu-His-Phe-Pro-Gly-Pro that is based on the ACTH(4-10) fragment of adrenocorticotropic hormone. Developed and studied extensively in Russia, Semax is used there as a nootropic and neuroprotective agent, including in stroke and cognitive disorders, and appears on the Russian list of essential medicines. The N-acetyl modification is meant to improve stability; it is far less studied than the parent peptide, and neither form is approved in most countries.

Phenethylamine

N-Phenethyl Dimethylamine

N-Phenethyl dimethylamine, chemically N,N-dimethylphenethylamine, is a doubly methylated analogue of the trace amine beta-phenylethylamine that is widely marketed as an Eria jarensis extract in pre-workout and fat-burner supplements [1]. It is promoted as a euphoric stimulant that lifts mood, energy and focus, and rose to popularity as a purported replacement for the banned stimulant DMAA. Its promotional mechanism centers on trace-amine and adrenergic signaling, but rigorous human research on the compound is very limited.

Phenethylamine

PEA-P

PEA-P (sold as PEA-P HCl) is a phenethylamine-family stimulant marketed as a mood and energy ingredient, built on the core structure of beta-phenylethylamine (PEA), the endogenous trace amine found in the brain and in foods such as chocolate [1]. The exact meaning of the P suffix and any additional substitution on the phenethylamine backbone are not clearly documented in the scientific literature, so its precise chemistry should be regarded as vendor-defined and unverified. Like PEA itself, it is presented as a short-acting stimulant acting through trace-amine and catecholamine pathways [1].

Pycnogenol

Pycnogenol is a trademarked dietary supplement made from the bark of the French maritime pine, Pinus pinaster, standardized to a high content of procyanidins. Rich in plant polyphenols that act as antioxidants, it is marketed for a wide range of conditions from circulation problems to skin health. Independent reviews of the clinical trials, however, have concluded that the evidence is not strong enough to confirm a benefit for any specific disorder. It is sold as a supplement rather than an approved medicine.

Adaptogen

Schisandra

Schisandra chinensis, known as magnolia berry, five-flavor berry, or wu wei zi, is a deciduous woody vine native to East Asia whose red berries have been used for centuries in traditional Chinese and Russian medicine. It is classified as an adaptogen, a plant said to help the body resist stress, and its activity is attributed to a family of dibenzocyclooctadiene lignans such as schisandrin and the gomisins. Research has focused on its liver-protective, antioxidant, and central nervous system effects.

SKF-38393

SKF-38393 is a synthetic organic compound of the benzazepine class that acts as a selective agonist at the dopamine D1 receptor family. It is not a medicine but a research chemical, used in laboratory and animal studies to probe the functions of D1-type dopamine receptors. Because it stimulates these receptors relatively selectively, it has served as a standard tool for investigating dopamine signaling in the brain.

Souvenaid

Souvenaid is a medical food, taken as a once-daily nutritional drink, that is intended to support the formation of synapses in people with early Alzheimer's disease. It contains a patented mixture of nutrients called Fortasyn Connect, combining omega-3 fatty acids, uridine monophosphate, choline, phospholipids, and several vitamins. Clinical trials have produced mixed results, and systematic reviews have found little convincing effect on cognitive decline, although the product is generally well tolerated.

Tau Peptide

Tau peptide is a loosely used name for short peptide preparations marketed for brain and cognitive support, usually grouped with so-called bioregulator peptides. The label is not well standardized, and the sequences sold under it vary between vendors, so the name says little about the precise contents of a given product. Any connection to tau, the microtubule-associated protein of the nervous system, is largely nominal, and rigorous human data are scarce.

Theophylline

Theophylline is a naturally occurring methylxanthine (1,3-dimethylxanthine) that has been used as a bronchodilator and respiratory stimulant for more than 80 years. Structurally related to caffeine and theobromine and found in trace amounts in tea and cocoa, it relaxes airway smooth muscle and stimulates respiration through a combination of non-selective phosphodiesterase inhibition and adenosine receptor antagonism. At the low plasma concentrations achieved with modern sustained-release dosing, it also exerts anti-inflammatory effects by restoring histone deacetylase-2 (HDAC2) activity, a mechanism that can reverse corticosteroid resistance in severe asthma and chronic obstructive pulmonary disease (COPD). Because it has a narrow therapeutic window and numerous drug interactions, it is now generally reserved as an add-on therapy after inhaled agents.

Vasopressin

Vasopressin, also called antidiuretic hormone (ADH) or arginine vasopressin, is a peptide hormone made in the hypothalamus and released from the posterior pituitary gland. It helps the body conserve water by concentrating the urine and, at higher levels, narrows blood vessels to raise blood pressure. A manufactured form is used as a medicine in critical care, for example to support blood pressure in shock and to treat certain forms of diabetes insipidus.

Vesilute

Vesilute is a synthetic dipeptide composed of glutamic acid and aspartic acid (Glu-Asp). It is described as one of the short peptide bioregulators in the tradition of Russian gerontology research and is promoted as a tissue-specific peptide aimed at the urinary tract and bladder. Independent published research on Vesilute itself is very limited, and it is not an approved medicine; it is generally sold and handled as a research peptide.

Xelstrym

Xelstrym is dextroamphetamine delivered through the skin, and it is the first amphetamine patch approved for ADHD; the methylphenidate patch preceded it by fifteen years. The drug is not new and nothing about its pharmacology is: what is new is the delivery. A patch worn for about nine hours produces a gradual rise and then a controlled stop when it comes off, which solves two specific problems that oral stimulants handle badly, namely swallowing difficulty and the need to end the effect early rather than wait it out [2]. It was approved in 2022 on the strength of a pivotal study in children and adolescents [1].

Zeaxanthin

Zeaxanthin is a yellow-orange xanthophyll carotenoid and one of the most widespread carotenoids in nature. In humans it concentrates with lutein in the macula of the retina to form the macular pigment; at the central fovea, where blue-light exposure and oxidative load are highest, the retina enzymatically converts dietary lutein into a third pigment, meso-zeaxanthin, so that additional protection is generated precisely where it is most needed. Obtained from foods such as corn, peppers, saffron, and goji berries, it is used both as a food coloring and as a dietary supplement studied for eye health, with higher macular pigment density also associated with measures of visual and neural processing.