Stem extract refers to plant stem-derived botanical extracts used in skincare, typically supplying antioxidants, polysaccharides, and phytonutrients believed to support skin conditioning and protection against oxidative stress. Evidence for specific clinical benefits varies widely depending on the plant source and concentration.
| Reported effect | How often | Notes |
|---|---|---|
| Contact irritation (redness, stinging) | Uncommon | More likely with sensitive skin or higher concentrations of plant actives. |
| Allergic contact dermatitis | Rare | Botanical extracts can act as sensitizers in predisposed individuals. |
| Photosensitivity | Rare | Certain plant extracts contain photoreactive compounds; sun exposure may increase reactions. |
| Acneiform breakouts | Rare | Possible if formulated in occlusive or comedogenic bases rather than from the extract itself. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.