Gamma-linolenic acid (GLA) is an essential fatty acid (EFA) in the omega-6 family, and is found primarily in plant-based oils like evening primrose, black currant seed, flax, and borage oil. Coldwater fish like sardines, anchovies, mackerel, and salmon also contain GLA. However, some experts dislike the latter fish over concern for possible high levels of toxins.
EFAs are essential to human health, but cannot be made in the body and therefore must be obtained from food. Emerging sources of EFAs, and therefore GLAs, include krill (a coldwater crustacean) oil, multi-EFA supplements, macadamia nut oil, and hemp oil and powder.
Studies have revealed promising results that GLA may diminish joint pain, swelling, and morning stiffness associated with arthritis. A meta-analysis (or summary of a group of studies) completed in April 2000 suggested the benefits of GLA for rheumatoid arthritis include significant reduction of the symptoms for arthritis; GLA reduced the duration of morning stiffness by 60-65 percent and has been found safe for long-term use.
Clinical trials with GLA revealed that patients with severe skin conditions like eczema achieved noticeable benefits after six to 12 weeks of usage. Improvements in itching, inflammation, blister formation, and dryness were noticed. Additionally, most patients were able to reduce other drugs (i.e. antihistamines, cortisteroid creams, and ointments).
New investigations into other beneficial uses of GLA include diabetes, eye disease, menopausal symptoms, premenstrual syndrome (PMS), allergies, high blood pressure, and heart disease, among other conditions.
Experts recommend adults take between 1,000mg - 2,800mg daily.
Allergies
People who are prone to allergies may require more EFAs. In fact, women and infants who are prone to allergies appear to have lower levels of GLA in breast milk and blood.
Diabetes
Omega-6 fatty acid supplementation, in the form of GLA from evening primrose oil or other sources, may assist nerve function and help prevent nerve disease experienced by those with diabetes (called peripheral neuropathy and felt as numbness, tingling, pain, burning, or lack of sensation in the feet and/or legs).
- www.usadrug.com/IMCAccess/ConsSupplements/ GammalinolenicAcidGLAcs.shtml
- Karst, Karlene, "Health Fats for Life." A presentation at National Nutritional Foods Southwest Trade Show & Convention. Jan. 28-30, 2005.
- Nutraceuticals: The Complete Encyclopedia of Supplements, Herbs, Vitamins, and Healing Foods. Roberts, Arthur J., M.D., O'Brien, Mary E., M.D., Subak-Sharpe, Genell. Perigee. 2001.
Provided courtesy of Vitamin Retailer
