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Limited evidenceGeneral health

Hemp Seed Oil

Hemp seed oil is a decent culinary oil with a favorable omega-6 to omega-3 ratio and some gamma-linolenic acid, but it contains no CBD and no EPA or DHA. The small trials that exist show minor skin and lipid effects — it is food, not a therapeutic supplement.

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What the science says

  • Improves atopic dermatitis symptoms Limited evidence

    In a randomized crossover trial, 30 g/day of hempseed oil for 8 weeks reduced dryness, itchiness and dermal medication use in atopic dermatitis patients compared with olive oil, alongside increases in plasma linoleic and gamma-linolenic acid. It is one small trial with subjective endpoints and no replication, and other GLA-rich oils (evening primrose, borage) have failed to show consistent eczema benefit in larger meta-analyses.

  • Improves blood lipids Limited evidence

    A randomized trial comparing hempseed oil with flaxseed oil found shifts in fatty-acid profiles but no meaningful advantage in total or LDL cholesterol; flaxseed oil produced larger increases in ALA and some lipoprotein changes. Hemp seed oil is a reasonable fat to cook with, but no trial supports it as a cholesterol treatment.

  • Provides omega-3 benefits like fish oil Limited evidence

    Hemp seed oil supplies about 15–20% alpha-linolenic acid and roughly a 3:1 omega-6 to omega-3 ratio, which is better than most seed oils. But ALA converts to EPA at only about 5–10% and to DHA at under 1% in most adults, and less in men — so hemp oil is not a substitute for fish or algal omega-3 if EPA/DHA is what you want.

  • Contains CBD or cannabinoids Limited evidence

    Cold-pressed hemp seed oil is made from the seed, which contains negligible cannabinoids; any residual THC or CBD comes from trace contamination during processing. Products marketed as 'hemp oil' for anxiety or pain that list only hemp seed oil in the ingredients contain no active cannabinoid at all — a common and often deliberate labeling confusion.

Dosage & safety

Studied doseTrials used 30 g/day (about 2 tablespoons) of hempseed oil for 8–12 weeks; culinary use of 1–2 tablespoons daily is typical. Capsules usually supply 1,000 mg, meaning 15+ capsules would be needed to match a trial dose — buy the bottle, not the softgels. Use it cold: it has a low smoke point and oxidizes readily.
SafetyVery well tolerated as a food; large amounts can cause loose stools. It is highly polyunsaturated and goes rancid fast, so keep it refrigerated and dark, and discard it if it smells like old paint. Trace THC is possible in poorly processed products, and heavy consumption of hemp foods has occasionally produced positive workplace drug screens — relevant to tested athletes and safety-sensitive jobs. Because it contains GLA and other PUFAs, very high intake alongside anticoagulants warrants the usual mild caution. It is not a source of CBD, and it should not replace prescribed treatment for eczema or high cholesterol.

How to take it

TimingTiming does not matter — treat it as a food, not a dose.
With food?As food: drizzle it on salads or finished dishes, and never cook with it (low smoke point, oxidizes readily).
Worth knowingKeep it in the fridge in a dark bottle and throw it out if it smells like old paint — rancid seed oil is the usual reason people say it 'tastes bad'.

Interactions

With medications

  • warfarin, DOACs and antiplatelets

    Large daily intakes of polyunsaturated oil mildly increase bleeding tendency. keep your intake steady rather than varying it, and mention it to your prescriber

Well-established interactions only — this is not a complete list. Always tell your doctor and pharmacist what you take.

Frequently asked questions

Does hemp seed oil contain CBD?

No. Cold-pressed hemp seed oil is made from the seed, which contains negligible cannabinoids, so a 'hemp oil' listing only hemp seed oil contains no active CBD. Heavy consumption of poorly processed hemp foods has occasionally caused positive workplace drug screens from trace THC.

Is hemp seed oil a good source of omega-3?

Hemp seed oil supplies about 15-20% alpha-linolenic acid with roughly a 3:1 omega-6 to omega-3 ratio, but ALA converts to EPA at only about 5-10% and to DHA at under 1% in most adults. Hemp seed oil is not a substitute for fish or algal oil if you want EPA and DHA.

Does hemp seed oil help eczema?

The evidence is limited to one small crossover trial: 30 g/day of hemp seed oil for 8 weeks reduced dryness, itchiness and medication use in atopic dermatitis compared with olive oil. It has not been replicated, and other GLA-rich oils have failed in larger analyses.

How much hemp seed oil should I take?

Trials used 30 g/day (about 2 tablespoons) of hemp seed oil, so buy the bottle rather than 1,000 mg softgels, which would take 15+ capsules to match. Use hemp seed oil cold on salads or finished dishes, keep it refrigerated, and discard it if it smells like old paint.

Scientific references

Where to buy

Nature's Craft, Hemp Seed Oil, 120 Liquid Capsules (500 mg per Capsule)

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