Rheum Palmatum (Chinese rhubarb) root/stalk extract is a plant-derived ingredient containing anthraquinones, stilbenes (such as rhaponticin) and polyphenols valued in skincare for antioxidant, anti-inflammatory and skin-conditioning properties. It is used in formulations targeting irritation, oxidative stress and uneven tone.
| Reported effect | How often | Notes |
|---|---|---|
Contact irritation (redness, stinging) | Uncommon | More likely at higher concentrations or on sensitive/compromised skin. |
Allergic contact dermatitis | Rare | Sensitization reported to botanical constituents in predisposed individuals. |
Skin discoloration/staining | Rare | Anthraquinone pigments can temporarily tint skin or formulations. |
Photosensitivity | Very rare | Limited evidence; anthraquinones theoretically photoactive, but clinically uncommon. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.