Ingredients that improve moisture retention draw and hold water in the stratum corneum, helping maintain skin hydration and barrier function. They are commonly used in moisturizers and serums to reduce transepidermal water loss and improve skin texture.
| Reported effect | How often | Notes |
|---|---|---|
Mild transient stinging or tingling | Uncommon | More likely on compromised or freshly exfoliated skin |
Skin irritation or redness | Uncommon | Can occur with high concentrations of certain humectants such as urea or lactic acid |
Contact dermatitis | Rare | Allergic or irritant reaction to specific agents like propylene glycol |
Paradoxical dryness in low-humidity environments | Rare | Some humectants (e.g., glycerin) may draw water from deeper layers when ambient humidity is very low and not occluded |
Worsening of acne or folliculitis | Rare | Occlusive formulations may aggravate acne-prone skin |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.