Spinacia Oleracea Leaf Extract

Spinacia Oleracea (spinach) leaf extract is primarily used as an antioxidant/soothing botanical at low concentrations in leave-on products, and it is generally well-tolerated. However, like many plant extracts, it contains multiple bioactive compounds and trace impurities that can trigger irritant or allergic contact reactions in a minority of highly reactive or eczematous patients, especially on compromised skin. Given this non-zero but typically low risk profile, it fits best as a "gentle" ingredient rather than exceptionally gentle/inert. Safety Notes: In mainstream consumer leave-on skincare (serums, creams, masks) spinach leaf extract is often used as a minor antioxidant/soothing botanical at trace-to-low levels around 0.0005–0.1%, especially when supplied as a dilute glycerin/propylene glycol extract or part of a botanical blend. Higher-strength consumer products marketed around “superfood/greens” or antioxidant concentrates can use the extract at ~1–5% (typically as a standardized supplier extract solution), with 5% representing the upper end commonly seen before cost, odor/color, and stability constraints become limiting; rinse-off products typically sit toward the low end due to reduced contact time.