Essential fatty acids (such as linoleic and linolenic acid) and vitamins (commonly A, C, E) are used in skincare to reinforce the skin's lipid barrier, reduce transepidermal water loss, and provide antioxidant and conditioning effects. They support overall skin hydration, suppleness, and protection against oxidative stress.
| Reported effect | How often | Notes |
|---|---|---|
| Mild irritation or transient stinging | Uncommon | More likely with higher concentrations of vitamins A or C on sensitive skin. |
| Allergic contact dermatitis | Rare | Vitamin E (tocopherol) is a recognized but infrequent sensitizer. |
| Comedogenicity / breakouts | Uncommon | Certain oil-rich fatty acid sources may aggravate acne-prone skin. |
| Photosensitivity or erythema | Rare | Associated mainly with retinoid forms of vitamin A. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.