The headline: the evidence is mostly disappointing
We'll be direct, because it saves you money and false hope. Dermatology clinical guidelines conclude there is inconsistent-to-no evidence to recommend common supplements — fish oil, evening primrose oil, borage oil, multivitamins, zinc, vitamin E, or vitamin D — for treating established eczema. Reaching for a bottle is understandable; the science just hasn't backed it up.
The specifics, honestly
- Fish oil (omega-3): a Cochrane review of multiple trials found no convincing benefit for eczema.
- Evening primrose oil / borage oil: a large Cochrane review (27 trials, ~1,600 people) found no clinical benefit taken by mouth.
- Probiotics: not recommended for treating established eczema — the evidence is inconsistent. (Note: there's separate, more promising evidence for certain probiotics given in pregnancy/infancy to help prevent eczema — a different question, and still a doctor conversation. See our diet and eczema guide.)
- Vitamin D: the most mixed of the bunch — some studies link healthy vitamin D levels to milder eczema, but findings are inconsistent and it's not established as a treatment. If your child is deficient for other reasons, that's a general-health conversation with your doctor.
And supplements aren't automatically safe. ‘Natural’ doesn't mean harmless: some supplements interact with medicines or upset the stomach, doses matter in children, and the industry is loosely regulated. Never start a child on a supplement without checking with their doctor first.
Where your effort actually pays off
None of this means nothing helps — it means the proven help isn't in a pill. The evidence-backed levers are the unglamorous daily ones: faithful moisturizing, gentle cleansing, treating flares, managing triggers. If you're spending energy and money on eczema, that's where the return is. (For topical natural remedies with some evidence, see natural remedies.)
Put your effort where it actually pays
The proven lever isn't in a bottle — it's the daily routine. Ollowen keeps that on track and shows you it working, so your energy goes where the evidence is.
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Sources
- American Academy of Dermatology. Can oils, probiotics, or vitamins heal eczema?
- Bath-Hextall FJ, et al. Dietary supplements for established atopic eczema (Cochrane review).
- NCCIH (NIH). Skin conditions and complementary health approaches.
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