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Ingredient guide
homarine
In short
Homarine is a water‑loving molecule found in marine organisms, where it helps cells stay balanced under environmental stress. In skincare it’s used to support hydration, calm visible redness, and help the skin feel more resilient.
Reviewed against published evidence · editorially independent · no brand pays for placement
Works for
Redness · Barrier
Best used
Anytime
What it is
Zwitterionic betaine compound originally identified as an osmoprotectant in marine invertebrates including sea urchins and molluscs; in marine organisms it protects cells from osmotic stress and UV-induced oxidative load; proposed skin benefits include similar osmoregulatory stabilisation of keratinocytes under environmental stress, and antioxidant activity via free radical scavenging; water-soluble across all pH ranges; used in formulations targeting UV-stressed and sensitised skin; limited independent human trial data but promising in vitro antioxidant profiling.
Also found as
Related
Common questions
It helps the skin hold water and stay comfortable during environmental stress. It can also support a calmer appearance when skin looks flushed.
It suits most skin types, especially those that feel tight, reactive, or easily dehydrated.
It appears in hydrating serums, essences, and moisturisers and works well alongside other humectants and antioxidants.
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Personal guidance only · For clinical concerns, see a dermatologist.