Evening primrose oil contains gamma-linolenic acid (GLA), an essential fatty acid in the omega-6 family of oils that is metabolized to dihomogammalinolenic acid (DGLA). These fatty acids are precursors to prostaglandins series 1 and 2 (PGE1 and PGE2).  Evening primrose oil contains about 4 to 16 % GLA while Borage oil  has about 22% and black currant seed oil has about 17%. EPO has a high concentration of linoleic acid.

Evening Primrose 1300 mg
Jarrow Formulas
Evening Primrose oil 1300 consists of 100% pure, cold pressed oil of Evening Primrose (Oenothera lamarchiana), a potent source of Gamma Linolenic Acid (GLA), an omega 6 fatty acid produced in human metabolism.

Evening Primrose Oil Supplement Facts:
Amount Per Softgel
Calories - 13
Evening Primrose Oil - 1300 mg *
GLA (Gamma Linolenic Acid) - 117 mg

See here to purchase Evening-Primrose-Oil supplement

Evening Primrose Oil benefits
Evening primrose oil has antioxidant and anti-inflammatory properties.
Evening primrose oil has shown inconsistent results in the treatment of atopic dermatitis and other medical conditions.

Evening primrose oil benefit questions
Q. I have heard about using evening primrose oil for nights sweats associated with menopause. Can you substantiate this claim?
   A. We have not seen good studies that show evening primrose oil use has a major influence on night sweats associated with menopause.

Q. Does evening primrose oil have any adverse effect on the liver? My mom takes two GNC evening primrose oil capsules (1,300mg) each day. She recently had a CAT scan and now her doctor wants to do a PET scan on her liver as they see some “things” on the liver that they want to take a closer look at. My mom is wondering if the evening primrose oil is perhaps effecting her liver. Also, what is the difference between a 500mg and 1,300mg capsule of evening primrose oil?
   A. We have not come across any human studies indicating the use of evening primrose oil has a detrimental effect on the liver.

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