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Limited evidenceJoints & skin

Borage Oil

Borage oil is the richest common source of gamma-linolenic acid (GLA), roughly triple the concentration in evening primrose oil. Like evening primrose it failed for eczema in Cochrane review; the only halfway credible signal is modest pain relief in rheumatoid arthritis.

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What the science says

  • Does not improve eczema Strong evidence

    The 2013 Cochrane review that covered 8 borage oil trials (n=449) alongside evening primrose oil found no significant benefit over placebo on eczema symptoms, including patient-rated global improvement. The higher GLA content of borage did not translate into a better outcome.

  • Modest symptom relief in rheumatoid arthritis Limited evidence

    A Cochrane review of herbal therapies for rheumatoid arthritis found that GLA-containing oils (borage seed, evening primrose, blackcurrant) at roughly 1.4-2.8 g GLA/day produced moderate improvements in pain and morning stiffness in some trials, but the evidence was rated low quality with small samples and inconsistent results. It is not a substitute for DMARDs.

  • General anti-inflammatory effects Limited evidence

    GLA is converted to dihomo-gamma-linolenic acid and then to series-1 prostaglandins, which is a plausible anti-inflammatory route, but human biomarker and outcome data are inconsistent. Some of the GLA is also elongated to arachidonic acid, a pro-inflammatory precursor, which may blunt any net benefit.

Dosage & safety

Studied doseRheumatoid arthritis trials used about 1.4-2.8 g GLA/day, corresponding to roughly 6-14 g of borage oil (typically 20-24% GLA), for 6-24 weeks. Eczema trials used lower doses with no benefit.
SafetyUsually well tolerated; nausea, bloating, soft stools and headache occur. The important safety issue is that unrefined borage oil can contain hepatotoxic pyrrolizidine alkaloids — buy only products certified PA-free ("UPA-free"), and avoid it entirely in liver disease. May lower seizure threshold; avoid in epilepsy and with phenothiazines. Mild antiplatelet effect — caution with anticoagulants and before surgery. Contraindicated in pregnancy (pyrrolizidine alkaloid risk and possible uterine effects).

How to take it

TimingTiming does not matter; split across meals given the volume involved.
With food?With meals, which is the only way 6-14 g/day of oil is tolerable.
Worth knowingBuy only product certified free of pyrrolizidine alkaloids ("PA-free"/"UPA-free") — unrefined borage oil can carry hepatotoxic alkaloids, and this is not a theoretical concern.

Interactions

With medications

  • phenothiazines and antiepileptic drugs

    Like other GLA oils, borage may lower the seizure threshold. avoid if you have epilepsy or take phenothiazines

  • warfarin, DOACs and antiplatelet drugs

    Mild antiplatelet effect adding to anticoagulation. tell your prescriber and stop it before surgery

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

Frequently asked questions

Does borage oil help eczema?

No: the 2013 Cochrane review covering 8 borage oil trials (n=449) found no significant benefit over placebo for eczema. Borage oil's higher GLA content than evening primrose did not produce a better outcome.

Can borage oil help rheumatoid arthritis?

The evidence is limited: GLA-containing oils such as borage at about 1.4-2.8 g GLA/day produced moderate improvements in pain and morning stiffness in some trials, but quality was low and results inconsistent. Borage oil is not a substitute for DMARDs.

Is borage oil safe?

Unrefined borage oil can contain liver-toxic pyrrolizidine alkaloids, so buy only products certified PA-free or UPA-free and avoid borage oil with liver disease or in pregnancy. It may lower the seizure threshold and has a mild antiplatelet effect, so avoid it with epilepsy and stop it before surgery.

How much borage oil should I take?

Rheumatoid arthritis trials used about 1.4-2.8 g GLA/day, which means roughly 6-14 g of borage oil, for 6-24 weeks. Split that volume across meals for tolerability.

Scientific references

Where to buy

Deva, Vegan Borage Oil, GLA, 90 Vegan Caps (500 mg per Capsule)

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