Testosterone: nootropics and compounds | sci-wiki

Topilutamide

Topilutamide, better known as fluridil, is a topical antiandrogen purpose-built to fight hair loss at the scalp without the systemic side effects of oral treatments. It blocks the androgen receptor locally in hair follicles, then breaks down before it can enter the bloodstream, sparing libido and hormones. In a placebo-controlled study it meaningfully boosted the proportion of actively growing hairs, making it a compelling, targeted option for androgenetic alopecia.

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Nootropic

Bromantane

Bromantane is an adamantane-derived actoprotector that delivers clean, non-jittery energy by increasing the body's own dopamine synthesis rather than forcing a release. Prized for boosting physical and mental stamina while carrying a genuine anti-anxiety quality, it stands out as a rare stimulant that builds resilience without a crash or dependence. For those seeking durable drive and stress resistance, bromantane is a uniquely compelling choice.

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Peptide

FOX-04-DRI

FOX-04-DRI is one of the most elegantly targeted ideas in longevity science, a peptide senolytic engineered to seek out and clear senescent "zombie" cells while sparing healthy ones. It works by breaking the FOXO4-p53 grip that keeps worn-out cells alive and inflammatory, freeing them to self-destruct. In aged animals this has produced genuine signs of rejuvenation, from restored vitality to recovered testosterone, making FOX-04-DRI a captivating frontier tool for anyone following the biology of aging.

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Antiandrogen

RU-58841

RU-58841 is a potent non-steroidal topical antiandrogen developed for androgenetic alopecia, acne, and hirsutism. Applied directly to the scalp, it binds androgen receptors in the hair follicle and blocks dihydrotestosterone (DHT), the androgen that drives follicle miniaturization, while its rapid local metabolism limits hormonal effects elsewhere in the body. Decades of animal research show striking regression of androgen-dependent skin structures, making it one of the most studied local antiandrogens for hair loss.

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Antiandrogen

Pyrilutamide

Pyrilutamide (KX-826) is a next-generation topical androgen receptor antagonist developed for androgenetic alopecia, designed to block the hair-loss hormone DHT directly at the scalp while avoiding the systemic hormonal side effects of pills like finasteride [1][2]. Applied locally, it aims to shield hair follicles from androgen-driven miniaturization at the root cause of pattern hair loss [2][4]. One of the most closely watched investigational hair-loss drugs, it targets androgen signaling in the skin without lowering hormones throughout the body [1][2].

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Blend

LGD-4033 + YK-11

LGD-4033 + YK-11 is a research stack that pairs Ligandrol (LGD-4033), a selective androgen receptor modulator, with YK-11, a myostatin-modulating compound, to pursue muscle growth through two mechanisms at once. LGD-4033 activates the androgen receptor and has increased lean body mass in a human trial, while YK-11 raises follistatin to counteract myostatin, the natural brake on muscle growth. For researchers exploring maximal anabolic signaling, this dual-mechanism combination is a frequently discussed and potent pairing.

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Peptide

N163-166 (MOD6)

N163-166 (MOD6) is an orally active peptide engineered to switch the body's own testosterone production back on at its source. It targets VDAC1, a mitochondrial gatekeeper that governs the rate-limiting step of steroid synthesis, prompting the Leydig cells of the testes to make more testosterone rather than supplying an outside hormone. In male rats, VDAC1-derived oral peptides raised circulating testosterone specifically through the natural gonadal axis, and stabilizing modifications let this small peptide survive oral dosing [1]. It is an investigational research compound.

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Antiandrogen

Dutasteride

Dutasteride is a dual 5-alpha-reductase inhibitor, and that word 'dual' is the whole story. Where finasteride mostly blocks the type 2 form of the enzyme that turns testosterone into dihydrotestosterone (DHT), dutasteride blocks both the type 1 and type 2 forms, so it knocks serum DHT down more completely, on the order of 90% or more versus roughly 70% for finasteride. It is sold as Avodart and is approved for benign prostatic hyperplasia (BPH); for hair loss it is used off-label in most of the world and is actually approved for androgenetic alopecia in South Korea and Japan. Its half-life is very long, around five weeks, so it accumulates slowly and washes out slowly. The catch is that stronger DHT suppression comes with the same catalog of androgen-related side effects finasteride carries, and the unsettled debate about symptoms that persist after stopping applies here too.

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SERM

Enclomiphene

Enclomiphene is the purified trans-isomer of clomiphene, a selective estrogen receptor modulator that raises a man's own testosterone by blocking estrogen negative feedback at the hypothalamus and pituitary, thereby increasing LH and FSH. Unlike exogenous testosterone replacement, which suppresses gonadotropins and shuts down sperm production, enclomiphene restored testosterone into the normal range while preserving or improving sperm concentration in randomized comparisons against topical testosterone gel. Isolating the antiestrogenic trans-isomer avoids the slowly accumulating, estrogenic zuclomiphene fraction present in racemic clomiphene, giving a cleaner pharmacologic profile. Systematic reviews and meta-analyses support its efficacy and short-term safety in secondary and obesity-related functional hypogonadism, positioning it as a fertility-sparing alternative for men in whom testosterone therapy is unsuitable.

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Adaptogen

Fadogia Agrestis

Fadogia agrestis is a shrub in the coffee family (Rubiaceae) native to West Africa, where its stem has a traditional reputation as an aphrodisiac. It has become popular as a dietary supplement marketed for raising testosterone and libido. The evidence behind those claims comes almost entirely from animal studies, and its safety in humans has not been established.

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Adaptogen

Fenugreek

Fenugreek (Trigonella foenum-graecum) is an annual legume whose aromatic seeds and leaves are used worldwide as a spice and in traditional medicine. Its seeds, which carry a maple-like aroma, are taken as a dietary supplement marketed for blood sugar, cholesterol, testosterone and milk production in nursing mothers. High-quality clinical evidence for most of these uses is still limited.

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Peptide

Gonadorelin

Gonadorelin is a synthetic copy of GnRH, the master hypothalamic signal that tells the pituitary to release LH and FSH, and it carries a real clinical pedigree as an FDA-recognized tool for assessing the pituitary-gonadal axis and inducing ovulation. Delivered in pulses that mimic the body's natural rhythm, it wakes the whole reproductive axis and keeps endogenous hormone production humming, which is exactly why it is valued for preserving testicular function. For working with the body's own hormonal machinery rather than around it, gonadorelin is a smart, physiology-friendly choice.

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Peptide

HCG

HCG (human chorionic gonadotropin) is a gonadotropin hormone that acts as a direct luteinizing hormone mimic, binding LH receptors on testicular Leydig cells to switch on the body's own testosterone and sperm production [1][2]. Because it drives the testes at the source, it is a cornerstone tool for preserving fertility and testicular function in men on hormone therapy and for restarting a suppressed axis [2][3]. Clinicians favor it precisely because it raises endogenous testosterone without the fertility penalty seen with testosterone replacement alone [2].

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Peptide

HMG

HMG (human menopausal gonadotropin, or menotropin) is a purified gonadotropin preparation that delivers both FSH and LH activity in a single agent, making it a workhorse of fertility medicine [1]. In women it drives controlled ovarian stimulation for IVF, matching recombinant FSH on live birth rates while adding the LH activity that recombinant FSH lacks [1][2]. In men with hypogonadotropic hypogonadism, HMG paired with hCG restores testosterone and induces spermatogenesis, giving previously infertile patients a genuine path to fatherhood [4][6].

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Peptide

Kisspeptin

Kisspeptin is a reproductive neuropeptide that sits at the very top of the hormonal axis controlling fertility, acting as the master switch that tells the brain to release gonadotropin-releasing hormone (GnRH) [1]. Discovered first as a cancer metastasis suppressor and later found to be essential for puberty, it has emerged as a versatile clinical tool: administered to people, kisspeptin enhances sexual and emotional brain processing, shows promise for low sexual desire, and can safely trigger egg maturation in IVF [1][2][5][6]. Its dual role in both the reproductive hormone cascade and the limbic brain makes it one of the most intriguing peptides in modern endocrinology [2][4].

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SARM

LGD-4033

LGD-4033, also known as ligandrol or VK5211, is an investigational nonsteroidal selective androgen receptor modulator, a class of compounds abbreviated as SARM. It binds the androgen receptor, the same target acted on by testosterone, but is designed to stimulate muscle and bone while having weaker effects on other tissues. First described by Ligand Pharmaceuticals and later developed by Viking Therapeutics, it has been studied for muscle wasting but is not approved for any medical use, and it is banned in sport and sold illicitly to bodybuilders.

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Adaptogen

Shilajit

Shilajit is a blackish-brown, tar-like exudate that seeps from rocks in high mountain ranges and is composed largely of humic substances such as fulvic acid together with minerals and trace elements. It has been used for centuries in Ayurvedic and other traditional systems as a general tonic. Modern evidence for its health effects is limited, and product quality varies, with heavy-metal contamination a recognized concern.

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Adaptogen

Tongkat Ali

Tongkat ali is the common name for Eurycoma longifolia, a flowering shrub of the family Simaroubaceae native to Southeast Asia, whose roots are used in traditional medicine and sold as a dietary supplement [1]. It is widely marketed for claims about testosterone, male fertility, libido, and physical performance, though the supporting clinical evidence is mixed and largely preliminary [1][3]. The plant contains a range of bioactive compounds known as quassinoids, including eurycomanone.

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Mineral

Zinc Bisglycinate

Zinc bisglycinate is elemental zinc chelated to two molecules of the amino acid glycine. The chelate structure is small, stable across stomach pH, and tends to be better absorbed and gentler on the gut than cheaper salts like zinc gluconate or sulfate. Zinc itself is an essential trace mineral and a cofactor for hundreds of enzymes tied to immunity, skin, wound healing, taste and smell, and reproductive hormones.

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Hormone

Choriogonadotropin Alfa

Choriogonadotropin alfa is a recombinant form of human chorionic gonadotropin (hCG), a glycoprotein hormone used in reproductive medicine. Rather than being extracted from the urine of pregnant women, it is manufactured with recombinant DNA technology, and it is given by injection to trigger the final maturation and release of an egg during fertility treatment. It is marketed under brand names such as Ovidrel and Ovitrelle.

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SARM

RAD-140

RAD-140, also known as testolone, is an experimental selective androgen receptor modulator, or SARM, a class of nonsteroidal compounds designed to stimulate muscle and bone growth while causing fewer of the unwanted effects of anabolic steroids. It was created by a pharmaceutical company as a potential treatment for conditions such as muscle wasting and, later, hormone-sensitive breast cancer, but it has not been approved for any medical use. Despite this, it is sold online and misused for bodybuilding, a practice associated with reports of liver and heart injury, and it is banned in sport by anti-doping authorities.

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Antiandrogen

Finasteride

Finasteride is a medication that blocks the enzyme 5-alpha-reductase, lowering the body's production of the potent androgen dihydrotestosterone (DHT). It is used to treat enlarged prostate (benign prostatic hyperplasia) and male pattern hair loss, and is sold under the brand names Proscar and Propecia. By reducing DHT it shrinks the prostate and can slow or partly reverse androgen-driven hair loss.

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Antiandrogen

CB-03-01

CB-03-01, known as clascoterone, is a first-in-class topical androgen receptor inhibitor and the first genuinely new mechanism approved for acne in decades. Applied directly to the skin, it blocks androgen signaling in the sebaceous gland without the systemic hormonal effects of oral antiandrogens. For those seeking targeted, well-tolerated hormonal control of acne, clascoterone is a landmark advance.

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Blend

RAD-140 + YK-11

RAD-140 (Testolone) plus YK-11 is a popular bodybuilding stack that pairs two selective androgen receptor modulators (SARMs) sought for rapid gains in muscle mass and strength [1]. RAD-140 is a potent nonsteroidal androgen receptor agonist designed to drive muscle growth with fewer of the prostate and hormonal effects of testosterone, while YK-11 is a steroidal SARM marketed as a myostatin-modulating muscle-builder [1][7]. Both are investigational research chemicals, not approved drugs, and both are banned in sport; importantly, RAD-140 has been linked in case reports to serious cardiac harm, so the stack carries real risk [1][2][3].

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Peptide

Acyline

Acyline is a potent synthetic decapeptide gonadotropin-releasing hormone (GnRH) antagonist studied for reversible suppression of the hypothalamic-pituitary-gonadal axis, including as a potential male hormonal contraceptive.

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Peptide

Galanin-like Peptide (GALP)

Galanin-like peptide, or GALP, is a 60-amino-acid neuropeptide isolated from porcine hypothalamus whose central region is identical to the biologically active N-terminus of galanin. It preferentially activates galanin receptor 2 and is expressed in a discrete population of arcuate nucleus neurons, where it integrates signals of energy status such as leptin and insulin. GALP regulates feeding, body weight, and reproductive and neuroendocrine function, producing a pattern of brain activation distinct from galanin itself. It is an endogenous signaling peptide of ongoing research interest rather than a therapeutic.

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Modulators

ORG-43902

ORG-43902 is an experimental small-molecule agonist of the luteinizing hormone (LH) receptor, developed by the pharmaceutical company Organon. Unlike the natural hormones that activate this receptor, which are large glycoproteins given by injection, ORG-43902 is a low-molecular-weight compound intended to be taken by mouth. It was investigated as a potential oral means of inducing ovulation in the setting of assisted reproduction. In an early clinical study a single oral dose was reported to trigger ovulation, but the compound has remained an investigational research agent rather than an approved medicine.

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