Best Serum for Dehydration
Dehydrated skin feels tight, looks dull, and shows fine lines that weren't there yesterday. Here's the single serum /PHD/'s dermatologist council recommends as the best hydration fix.
Dehydration is a skin state, not a type — even oily skin can be dehydrated. The fix is a humectant serum that pulls water deep into the skin and holds it there. Hyaluronic acid is the most studied, most effective humectant for this.
The Best Serum for Dehydration
2% Hyaluronic Acid Dewy Skin Serum
Hyaluronic acid holds up to 1,000× its weight in water. /PHD/'s multi-molecular-weight formula reaches multiple skin layers — not just the surface — so hydration is deep, visible, and lasting. Safe for every skin type, including oily and acne-prone.
Apply on damp skin within 60 seconds of cleansing, twice daily. Follow immediately with a moisturiser to seal the hydration in. This is the exact serum linked from the Dehydration concern in Find Your Dermat Routine on the homepage.
How to use it
Apply on damp skin within 60 seconds of cleansing, twice daily. Always follow with a moisturiser — HA without an occlusive layer on top will evaporate and take skin moisture with it.
Frequently Asked
What's the difference between dry skin and dehydrated skin?
Dry is a skin type (low oil production — usually genetic). Dehydrated is a skin state (low water content — temporary). Oily skin can still be dehydrated; in fact it often IS, because over-cleansing triggers rebound oil production.
Will drinking more water hydrate my skin?
Partially. Internal hydration supports your skin's baseline moisture, but topical humectants (like hyaluronic acid) do most of the visible work. You need both — plus a moisturiser on top to seal water in.
Do I apply HA on damp or dry skin?
Damp. Apply the HA serum within 60 seconds of cleansing while skin still has some moisture — the humectant will pull that moisture deeper into the skin. On completely dry skin, HA can paradoxically pull water out of deeper layers in low-humidity air.