Source Naturals, Vitamin C Non-GMO, 1000 mg, 240 TabsProduct Description Source Naturals Non GMO Vitamin C provides all of vitamin C's health benefits, including support for the immune system, collagen formation, hormone production, and iron utilization. While much of the vitamin C on the market is derived from genetically modified ingredients, Source Naturals carefully scrutinizes its sources of vitamin C to ensure it is obtained from only nongenetically modified materials.* Product Benefits For Immune