Amaranthus Caudatus Seed Extract

Amaranthus caudatus (amaranth) seed extract is typically used at low concentrations as an antioxidant/soothing, skin-conditioning botanical, and available safety/patch-test data for amaranth-derived cosmetic ingredients suggests a low rate of irritant reactions. However, as a plant extract containing multiple bioactive compounds, it carries a non-zero risk of irritation or allergy in highly reactive or eczematous skin, especially when layered with other actives. Scoring it as very gentle (0.2) reflects generally good tolerability while acknowledging rare but clinically relevant sensitivity potential. Safety Notes: In commercial skincare, Amaranthus caudatus seed extract is most often used as a minor “botanical/antioxidant/soothing” component in complex blends, where finished-product use levels commonly land around 0.001–0.1% (especially in leave-on serums/creams listing it mid-to-late INCI). Higher-strength consumer products marketed around amaranth-derived actives (e.g., antioxidant/peptide-like or barrier-support positioning) can reach ~1–5% finished-product inclusion when the extract is a primary featured ingredient; above this is uncommon due to cost, sensory impact, and variability of extract solids. Rinse-off products typically sit at the low end because brief contact time reduces the incentive for high loading.