Lavender hydrosol is the aqueous byproduct of steam-distilling Lavandula flowers, used as a fragrant base, toner, or mild soothing agent in skincare formulations. It contains trace water-soluble aromatic compounds but is far less concentrated than lavender essential oil.
| Reported effect | How often | Notes |
|---|---|---|
Allergic contact dermatitis | Uncommon | Linked to residual linalool/linalyl acetate, which can oxidize into sensitizing compounds. |
Skin irritation or redness | Uncommon | More likely in sensitive or compromised skin. |
Fragrance sensitivity reactions | Uncommon | Naturally occurring aromatic constituents may trigger reactions in fragrance-sensitive individuals. |
Photosensitivity | Rare | Generally low risk; lavender is not a strongly phototoxic botanical. |
Microbial contamination effects | Rare | Hydrosols are prone to microbial growth if poorly preserved, potentially causing irritation. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.