Question 1

How does borage seed oil work in the body?

Accepted Answer

Borage seed oil works primarily through its high gamma-linolenic acid (GLA) content, the highest of any known plant source at approximately 20-26%. GLA is an omega-6 fatty acid that converts to anti-inflammatory prostaglandins in the body. This conversion bypasses the often-impaired delta-6-desaturase enzyme step, making GLA directly available for producing series-1 prostaglandins that reduce inflammation and support skin barrier function. Evidence Level: C.

Question 2

Does borage seed oil interact with blood thinners or other medications?

Accepted Answer

Borage seed oil may interact with anticoagulant and antiplatelet medications, including warfarin, aspirin, and clopidogrel. The GLA content can affect platelet aggregation and may increase bleeding risk when combined with blood-thinning medications. Additionally, borage oil may interact with nonsteroidal anti-inflammatory drugs (NSAIDs) and phenothiazines. Patients taking blood thinners should avoid borage seed oil or consult a healthcare provider before use. Evidence Level: C.

Question 3

What is the recommended dosage for borage seed oil supplements?

Accepted Answer

The typical adult dosage for borage seed oil is 500-2000mg of GLA daily, which usually translates to 1-3 grams of borage oil depending on GLA concentration. For skin conditions, doses of 500-1000mg GLA daily have been used. Topical applications can be applied as needed. Dosage should be divided throughout the day with meals to improve absorption and reduce gastrointestinal side effects. Evidence Level: C.

Question 4

Is borage seed oil safe during pregnancy and breastfeeding?

Accepted Answer

Borage seed oil is considered unsafe during pregnancy and should be avoided. The oil may contain pyrrolizidine alkaloids (PAs), which are hepatotoxic and may harm fetal development. While properly processed, certified PA-free borage oil exists, the precautionary principle applies due to potential contamination. There is insufficient safety data for breastfeeding. Women who are pregnant, trying to conceive, or breastfeeding should not use borage seed oil without medical supervision. Evidence Level: C.

Question 5

What are the benefits of borage seed oil for skin conditions?

Accepted Answer

Borage seed oil is widely used in European herbalism for treating skin conditions, particularly eczema, dermatitis, and dry skin. The high GLA content supports skin barrier function by promoting ceramide synthesis and reducing transepidermal water loss. Topical application may improve skin hydration, reduce inflammation, and support wound healing. Some evidence suggests oral supplementation may benefit atopic dermatitis, though clinical trials show mixed results. Evidence Level: C.

Question 6

What are the side effects of taking borage seed oil?

Accepted Answer

Common side effects of borage seed oil include gastrointestinal upset, particularly at higher doses above 2000mg daily. Symptoms may include bloating, nausea, loose stools, and abdominal discomfort. Headaches have also been reported. Long-term use of improperly processed borage oil containing pyrrolizidine alkaloids carries risk of liver damage. Always choose certified PA-free products from reputable manufacturers. Evidence Level: C.

Borage Seed Oil

Sources & Citations

Summary

Background

Traditional uses

Active compounds

Mechanism of action

Clinical evidence

Safety & adverse effects

Pregnancy & lactation

Drug interactions

Evidence summary

PubMed sources

Government sources