The most common side effects are GI-related
Glutathione S-transferase in research subjects esophageal carcinoma [PMID: 8517648] Laboratory literature summary: Glutathione S-transferase in research subjects esophageal carcinoma
[ CrossRef ] [ Google scholar ] [ PubMed ] Wang GS, Gruber H, Smyth P, Pulido O, Rosenberg L, Duguid W,et al
doi:10.1186/1743-7075-10-2
News Release August 07, 2002 ConsumerLab.com finds some spoilage and inaccuracy among omega-3 and 6 supplements List released of evening primrose, flaxseed and other GLA/ALA products that passed testing WHITE PLAINS, NY August 7, 2002 ConsumerLab.com, an independent evaluator of health and nutrition products, released results today of its Product Review of Black Currant, Borage, Evening Primrose, and Flaxseed Oils: Sources of ALA and GLA (Omega-3 and -6 Fatty Acids)