NOW's Spirulina 1000 mg tablets are certified organic and non-GMO. These tablets are an easy way to get a daily dose of this nutrient rich superfood featuring beta-carotene (Vitamin A) and Vitamin B-12. This double strength product has twice the Spirulina (1,000 mg per tablet) as in our regular strength product (500 mg per tablet). USDA Organic, Non-GMO, Genuine Whole Foods, Quality GMP Assured, Vegan/Vegetarian, Soy Free, Sugar Free GMP Quality Assured: NPA A-rated GMP certification means that every aspect of the NOW manufacturing process has been examined, including our laboratory/testing methods (for stability, potency, and product formulation).