Everyone says this stuff hydrates. But the rumor is it can actually suck moisture *out* of your skin.
It hinges on one thing: the humidity in your air. If it’s drier outside than in your skin, the serum can pull water from you into the atmosphere. A reverse osmosis situation.
It’s The Ordinary’s Hyaluronic Acid 2% + B5. $8. I tested the claim that it backfires in dry climates.
Texture
Slightly viscous, like thin syrup.
Absorption
Sinks in under 15 seconds — leaves zero residue.
Packaging
The dropper is fine, but you’ll use it up fast.
Photo: Sonia Roselli / Unsplash
It’s not one hyaluronic acid. It’s three forms with different molecular weights. The low-weight one can penetrate deeper, which is where the dehydration fear starts.
- Hyaluronic Acid: Binds up to 1000x its weight in water
- Sodium Hyaluronate: A smaller, penetrating form
- Hyaluronic Acid Crosspolymer: A time-released form
- Vitamin B5 (Panthenol): Helps support skin barrier
Photo: Curology / Unsplash
Damp skin, three drops. It spreads like water, then vanishes. Immediate tightness — not the good kind. A thirsty pull.
By week two in dry indoor heat, that tightness turned to fine, papery lines on my cheeks. The serum was hoarding water, not sharing it.
Plumped fine lines when used perfectly. Zero effect on deep hydration. My skin felt bouncier but not more nourished.
It doesn’t dehydrate you. It just exposes your environment’s failings. A high-maintenance friend who’s amazing in the right setting.