NOW Supplements, Vitamin C Crystals Ascorbic Acid, 100% Pure Powder, 8-OunceAscorbic Acid Pure Powder Pharmaceutical Grade GMP Quality Assured: NOW closely ads to both mandatory U.S. FDA Current Good Manufacturing Practices (CGMP) regulations and voluntary Natural Products Association (NPA) Good Manufacturing Practices (GMP) regulations. Good manufacturing practices ensure compliance with sanitation, processing, documentation, and testing requirements that are designed to promote consistent, highly reproducible product quality and safety. Packaged in the USA by a family owned and operated company since 1968 Vitamin C is a water soluble nutrient well known for its vital role in the immune system.* Vitamin C is necessary for the production of collagen (a structural protein in connective tissue) and is tfore important for skin, bone, and joint health.* Vitamin C is needed for amino acid metabolism and the utilization of many nutrients such as folic acid and iron.* It is also a highly effective antioxidant that can protect the body's cells and molecules from damage by free radicals and reactive oxygen species generated during normal metabolism and exposure to environmental stressors.* From the FDA's website: "Some scientific evidence suggests that consumption of antioxidant vitamins may reduce the risk of certain forms of cancer. However, FDA has determined that this evidence is limited and not conclusive." Natural color variation may occur in this product. This product is sold by weight not volume. Payment DetailsWe currently accept payment via PayPal only. Once payment is cleared, we will dispatch your shipment within 1-3 business days. Please refer to the "Shipping" tab for more information regarding shipping speed to your destination.Return PolicyAs our valued customer, we will do our best to make sure the product you receive arrives to you on time and as expected. If you are not satisfied with your purchase, please contact us within 30 days of receiving your order to process a return.