What is GLA (Borage Oil)?

Borage oil is pressed from the seeds of the borage plant (Borago officinalis), a Mediterranean herb with striking blue star-shaped flowers, earning it the nickname 'starflower oil.' It is the most concentrated natural source of gamma-linolenic acid (GLA), an omega-6 fatty acid that most people struggle to produce in adequate amounts. Unlike standard omega-6 fats that tend to drive inflammation, GLA takes a different path and actually helps the body cool it down.

How does GLA (Borage Oil) work?

The body converts GLA into a family of hormone-like compounds called prostaglandins — particularly PGE1 — that put the brakes on inflammation, support healthy skin barrier function, and help regulate immune responses. Many people have impaired conversion of dietary fats into GLA due to stress, aging, poor diet, or genetics, so supplementing directly bypasses that bottleneck. By supplying GLA pre-formed, borage oil gives the body a ready-made building block for these calming, regulatory compounds.

What forms does GLA (Borage Oil) come in?

Softgel capsules are the most common and convenient form, typically standardized to GLA content. Always choose products certified as pyrrolizidine alkaloid (PA)-free, as borage plants naturally contain low levels of these liver-toxic compounds that should be removed during processing. Topical borage oil is used directly on skin for eczema and dryness.

Where it comes from:

Borage has been grown across the Mediterranean and Middle East for over 2,000 years, used in traditional European herbal medicine as a mood lifter, adrenal tonic, and treatment for skin and joint complaints. Modern scientific interest in borage oil began in the 1980s when researchers identified its unusually high GLA content and began studying its anti-inflammatory properties.

What does GLA (Borage Oil) help with?

• Eczema and dry, inflamed skin: GLA is a key building block for the skin's protective barrier, and people with eczema often show reduced ability to produce it naturally. Supplementing with borage oil helps restore moisture retention, reduce redness and itching, and strengthen the skin's outer layer. Both oral capsules and topical application have shown benefits in clinical studies.
• Rheumatoid arthritis and joint pain: GLA shifts the body's inflammatory chemistry in a direction that reduces joint swelling and morning stiffness — the hallmarks of rheumatoid arthritis. Several trials have found that people taking GLA-rich oils needed fewer anti-inflammatory medications over time and reported meaningful reductions in pain and tenderness.
• PMS symptoms: GLA helps regulate prostaglandins that influence hormone-related changes throughout the menstrual cycle. Women with PMS often show lower GLA conversion, and supplementation has been linked to reduced breast tenderness, mood swings, and bloating in the days before a period.
• Hormonal acne and skin issues: GLA helps modulate sebum production and reduces the low-grade skin inflammation that drives hormonal breakouts. Its anti-inflammatory action targets the same pathways involved in acne without the harshness of topical treatments.
• Diabetic neuropathy: Nerve damage from diabetes is associated with impaired GLA metabolism. Supplementing with GLA has been studied for improving nerve conduction and reducing symptoms like tingling and numbness in people with mild to moderate diabetic neuropathy.
• Dry eye syndrome: GLA supports the fatty acid balance in tear film, helping eyes stay lubricated. It works particularly well when combined with omega-3s, targeting the inflammation at the root of chronic dry eye.
• Breast pain (mastalgia): Cyclic breast pain tied to hormonal fluctuations has been treated with GLA-rich oils in clinical settings. It appears to reduce the sensitivity of breast tissue to normal hormonal shifts, easing both tenderness and swelling.
• Childhood atopic dermatitis: Children with atopic dermatitis (a form of eczema) often show measurably low GLA levels. Supplementation — both dietary and topical — has been studied to reduce itching, redness, and skin dryness in pediatric populations, with a favorable safety profile.
• Inflammatory skin conditions (psoriasis): GLA's ability to shift inflammatory signaling may help reduce the skin cell overproduction and redness seen in psoriasis. Results are more preliminary than for eczema, but many people report softer, less inflamed skin with consistent use.

What can GLA (Borage Oil) help prevent?

• Progression of mild diabetic nerve damage (when used early)
• Skin barrier breakdown in people with eczema-prone or aging skin

Which foods are rich in GLA (Borage Oil)?

1. Borage seeds / borage seed oil: The highest known plant source of GLA, containing 20–26% by weight — far more than any other common food source.
2. Evening primrose oil: Contains 8–10% GLA and is the most widely studied alternative to borage oil for the same conditions.
3. Black currant seed oil: Contains 15–18% GLA and is available as a supplement; black currants themselves contain small amounts.
4. Hemp seeds and hemp seed oil: Contains modest amounts of GLA (2–3%) along with a favorable omega-3 to omega-6 ratio that supports GLA's anti-inflammatory effects.
5. Oats: Contain trace GLA and support the enzymatic conversion of linoleic acid to GLA, particularly when consumed as part of a whole-food diet.

Practical Tips:

GLA is found in meaningful amounts almost exclusively in plant seed oils, not in everyday foods. To support GLA production from dietary sources, reduce intake of trans fats, excess alcohol, and refined sugar — all of which block the enzyme (delta-6-desaturase) your body uses to make GLA from dietary fats.

What are the side effects of GLA (Borage Oil)?

• Mild nausea or loose stools (especially when starting)
• Bloating or belching (fishy or plant-oil aftertaste)
• Headache in sensitive individuals
• Potential liver toxicity with low-quality products containing pyrrolizidine alkaloids (choose PA-free certified brands)
• Increased bleeding time at high doses
• Not recommended during pregnancy due to possible uterine-stimulating effects

Good to know:

Borage oil is safe for most adults when taken from PA-free certified products at recommended doses. The most important safety consideration is ensuring the product has been processed to remove pyrrolizidine alkaloids (PAs), naturally occurring compounds in the borage plant that can harm the liver with prolonged exposure.

How much GLA (Borage Oil) should you take?

• Recommended daily: 1,000–3,000 mg borage oil per day (providing approximately 200–720 mg of GLA); therapeutic doses for joint and skin conditions typically aim for 360–720 mg GLA daily
• Best time of day: Any time of day; splitting into two doses (morning and evening) can improve tolerability
• With or without food: Take with food — fat-soluble; a meal containing some healthy fat significantly improves absorption and reduces digestive side effects
• Time to effect: Skin benefits: 6–8 weeks; joint pain relief: 8–12 weeks; hormonal symptom relief: 2–3 menstrual cycles
• How long to take it: Can be taken continuously for chronic skin and joint conditions; reassess every 3–6 months. For PMS and hormonal cycling, some practitioners recommend continuous use rather than cycling.