Dimethyl Mea

Dimethyl MEA (commonly used as dimethylaminoethanol/DMAE) is a skin-conditioning “firming” active typically used around ~0.5–3% in leave-on products, where it can cause stinging, tightness, and irritant dermatitis—especially on compromised barriers (eczema, rosacea, post-procedure). Human experience reports and patch/usage testing indicate a meaningful irritation rate in sensitive populations, so I score it as moderate and recommend patch testing and cautious introduction. Safety Notes: In commercial skincare, Dimethyl MEA (commonly listed as DMAE/Dimethylaminoethanol or its salts) is typically used at low levels (~0.1–0.5%) in general anti-aging serums/creams where it functions as a skin-conditioning/firming support ingredient. Mid-range consumer leave-on firming products frequently sit around 1–3%, while the highest OTC “DMAE lifting/firming” specialty serums and gels marketed directly to consumers are commonly found up to about 5% due to increasing risk of irritation/tightness and formulation/comfort limits at higher levels. Rinse-off use is less common and generally trends lower than leave-on because of short contact time and cost/benefit.