Rehmannia Chinensis Root Extract

Rehmannia Chinensis Root Extract is a botanical extract used mainly for soothing/antioxidant claims, typically at low concentrations (often well under 1–2%). While not a known high-irritancy active, botanical extracts have meaningful variability and can trigger irritant or allergic contact dermatitis in sensitive/eczema-prone populations due to complex phytochemical content and potential contaminants, so I rate it as mild rather than “gentle.” In real-world routines with multiple botanicals and preservatives, cumulative reactivity is plausible, warranting cautious placement at 0.4. Safety Notes: In commercial skincare, Rehmannia Chinensis Root Extract (a TCM botanical) is most often used as a low-level supporting extract in multi-botanical soothing/anti-aging formulas, commonly in the ~0.001–0.1% range (leave-on toners, emulsions, and serums), especially when supplied as a glycerin/butanediol-based extract. Higher-strength consumer-available products marketed as “herbal/hanbang concentrates” or mask/ampoule-style products can reach ~1–5% of the extract solution, with practical upper limits driven by odor/color, stability, and tack; rinse-off cleansers typically sit toward the low end due to brief contact time. There are no specific FDA/EU maximum limits for this INCI, so observed market use is primarily constrained by formulation aesthetics and supplier extract potency.