The Dewy Serum
Reviewed by SerumTruth Editorial · Price and formula checked July 2026
A pleasant, well-made everyday plumping and hydration serum, built on brand ritual and finish rather than a stacked or high-dose treatment active. The hyaluronic acid and squalane will genuinely support a dewy look while it is on the skin, but with no disclosed HA percentage, it does not compete on proven actives per dollar against a disclosed hyaluronic acid serum at a fraction of the price.
- No active concentrations are disclosed
- Costly to use, about $53 a month
- Evidence21 / 30
Strength of the research behind the key actives
- Hyaluronic Acid: moderate evidence
The average of the key actives’ evidence grades.
- Potency21 / 25
Dosed at studied levels, not fairy-dusted
- Hyaluronic Acid: dosed at a studied level
How strongly the actives are dosed, led by the strongest, not how many there are.
- Delivery & stability16 / 20
Delivery tech + packaging that protects fragile actives
- Delivery: standard
- Packaging: airless, opaque
- No fragile actives here, so packaging barely moves the score.
Delivery tech plus packaging, and packaging only counts when actives are fragile.
- Formulation1 / 10
Disclosure, active breadth, and ingredient generation
- 0 of 1 actives disclose a concentration
- 1 key active (breadth credit caps at 3)
- No current-generation or synergy bonus
Disclosure, active breadth, and current-generation or synergistic actives.
- Value4 / 15
What a month of use costs vs. the category
- About $53 per month to use
- $89 for 30 ml, used about twice a day (about 0.3 ml each time), so a bottle lasts about 1.7 months
What a month of use costs: full marks at $6 a month or less, the floor at $60 a month or more.
Tap any row to see how its score was built.
Ranks #73 of 84 hydration & barrier serums we have scored.
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What’s inside
| Active | Disclosed | Dose |
|---|---|---|
| Hyaluronic Acid | n/a | Studied |
A hydration-and-finish serum led by Tatcha's Hadasei-3 fermented rice, green tea and sea algae complex, which tops the ingredient list, plus squalane and undisclosed-level sodium hyaluronate, with hydrolyzed collagen and elastin for a plumping feel and a small dose of ascorbyl tetraisopalmitate (an oil-soluble vitamin C ester) folded in as a minor supporting antioxidant rather than a dosed brightening active. It comes in an opaque pump bottle. Nothing in the formula is especially air- or light-sensitive, so the packaging is a reasonable, low-stakes choice.
How it’s delivered
Air- and light-sensitive actives (vitamin C, copper peptides) lose potency fast in the wrong packaging, so delivery and the bottle are scored, not just what’s on the label.
The actives, explained
What the research says
A multicenter study linked a topical hyaluronic acid serum with better looking hydration, tone, and texture over several follow up visits.
Multicenter evaluation of a topical hyaluronic acid serum. Journal of Cosmetic Dermatology, 2022. PubMed ↗
A study of the active, not this exact product. What matters for the score is whether this serum uses it at a comparable dose.
Higher-scoring alternatives
Same category, better SerumProof score. Worth a look before you buy.
Revision history
- July 11, 2026Price and formula rechecked
- July 10, 2026Review published
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Cosmetic information for general education, not medical advice. The SerumProof score reflects our reading of publicly available research and formulation disclosures. See how scoring works.