fatty acid · for dry skin
Omega-3
Gets built into skin cells, improving the barrier that holds moisture in.
Say that in clinical terms
Omega-3 fatty acids are incorporated into skin cell membranes, improving barrier function and transepidermal water loss. They support ceramide production, reduce inflammatory skin responses, and enhance skin lipid composition for better moisture retention.
How strong is the research?
2 papers read, 1 supporting.
Tested as: Krill oil (EPA+DHA in phospholipid form with natural astaxanthin, 1–2 g/day, e.g. Aker BioMarine krill oil)
Who was studied: The trials are in eczema and atopic dermatitis, not ordinary dry skin.
How much to take
daily with meals
1000–2000 mg
Omega-3s support skin hydration from within. Allow 6-8 weeks for noticeable skin improvements.
Before you take it
- FDA GRAS limit for dietary supplements: up to 5 g/day of combined EPA+DHA (not 3 g/day; the lower figure reflects an older FDA enforcement discretion letter, not the current GRAS determination).
- No formal Tolerable Upper Intake Level (UL) has been established by the IOM/NAM for EPA or DHA.
- Doses of 2–15 g/day may increase bleeding time by reducing platelet aggregation; clinically relevant when combined with anticoagulants (warfarin), antiplatelet agents (aspirin, clopidogrel), or NSAIDs.
- INR monitoring is advisable when omega-3 supplements are added to warfarin therapy; most evidence suggests doses of 3–6 g/day do not significantly alter anticoagulant status, but individual variation exists.
- Extended use at 4 g/day in individuals with established CVD or at high CVD risk is associated with a modestly increased risk of atrial fibrillation (documented in STRENGTH and REDUCE-IT trials).
- High doses (≥900 mg EPA plus 600 mg DHA/day) may reduce immune function.
- Omega-3 may add to the blood-pressure-lowering effect of antihypertensive medications; blood pressure monitoring is advisable when initiating supplementation in patients already on antihypertensive therapy.
- Common side effects include fishy aftertaste, belching, gastrointestinal discomfort, and nausea; these are dose-dependent and usually mild.
- Individuals with fish or shellfish allergies should verify product sourcing; algal EPA/DHA is a fish-free alternative.
- Oxidized (rancid) fish oil may have pro-inflammatory effects; product freshness and storage conditions matter.
When to take it
Best taken: with food
What we make of it
The source is a review of fish oil in skincare, not a trial.
The detail
What we cite is a narrative review of cosmetic and therapeutic uses of fish oil on skin. It is not a randomised trial, so it cannot carry the weight our label implies.