Paullinia Cupana Seed Extract

Paullinia cupana (guarana) seed extract is primarily an antioxidant/stimulant botanical used at low concentrations, but it contains caffeine and polyphenols that can be mildly astringent and more reactive on compromised barriers. Clinical irritation data are limited and variable for botanicals, and in eczema-prone or highly sensitized patients even low-level plant extracts can trigger stinging or redness. Given the uncertainty and real-world reactivity in sensitive populations, I score it as mild with occasional sensitivity possible. Safety Notes: In mass-market leave-on skincare (eye gels, anti-fatigue serums, moisturizers) and rinse-off cleansers, guarana extract is commonly used as a minor botanical/caffeine source at trace to low levels (~0.001–0.1%), often as part of a broader “energizing” complex. Higher-end body-firming/anti-cellulite leave-on products and some “high-plant-load” natural formulations use substantially more extract (typically ~0.5–3%), with the upper end around ~5% observed in consumer-available products where odor/color and caffeine-related irritation/sting become limiting factors. Actual delivered actives vary widely because extract type (water/glycerin, glycolic, CO2, and standardized caffeine content) differs, so the same % extract can represent very different caffeine/polyphenol levels.