DMAE

Dimethylaminoethanol is a colorless, viscous liquid that carries both a tertiary amine and an alcohol group and has a fishy, ammonia-like odor ^[1]. Because it is an analog of choline bearing one fewer methyl group on nitrogen, it has long been proposed to feed into the body's choline and acetylcholine pathways, though whether it actually raises acetylcholine in the brain is doubtful ^[2].

Beyond biology, DMAE has substantial industrial use: it serves as a curing agent for polyurethanes and epoxy resins, is used in gas treating to strip hydrogen sulfide from sour gas, and acts as a chemical precursor, while its acrylate derivative functions as a flocculating agent. In supplement form it is most often supplied as the bitartrate salt, which is only partly DMAE by weight.

Under the name deanol, the compound was marketed in the mid-20th century, for example as Deaner, and was studied both for attention-related problems and for tardive dyskinesia, a movement disorder caused by long-term antipsychotic use. Controlled trials found deanol no more effective than placebo for tardive dyskinesia, and one reported a tendency for schizophrenic symptoms to worsen, a pattern the authors linked to its inability to enhance brain acetylcholine synthesis ^[2][3]. A later pro-cholinergic salt of DMAE, tested over six months in people with early, prodromal Alzheimer's disease, similarly failed to produce a significant cognitive advantage over placebo ^[4].

DMAE has fared better in cosmetic dermatology. In a placebo-controlled trial, a topical DMAE facial gel applied daily was reported to reduce forehead lines and fine periorbital wrinkles and to improve lip fullness and overall appearance of aging skin, with good tolerability, and instrumental measurements confirmed an acute firming effect on the skin ^[1]. In vitro work also described the compound as a moderately active anti-inflammatory agent ^[1].

DMAE is not an approved drug for cognitive uses, and the older deanol drug products have largely fallen out of medical use. Today it circulates mainly as a dietary supplement and as a cosmetic ingredient, in forms that include DMAE bitartrate capsules and tablets as well as DMAE-containing creams and gels.

Skip DMAE in pregnancy; animal studies show birth defects (neural tube and limb issues), so it's off the table for anyone who is or might become pregnant. It's also a no-go in bipolar disorder, where it can trigger manic episodes by throwing off the cholinergic-dopaminergic balance. Be careful pairing it with antidepressants, especially MAOIs and TCAs, because of additive cholinergic effects, and don't run it with anticholinergic meds since it can blunt them. It's not recommended if you have epilepsy or schizophrenia. Otherwise it's an OTC supplement in the US, EU, and most places, and generally fine at standard doses, though higher amounts can bring overstimulation, muscle tension, and headaches.