Nutricost Ascorbic Acid Powder (Vitamin C) contains 0.5lbs (8oz) of pure ascorbic acid powder per bottle. This product is non-GMO, gluten free, soy free, and made in a GMP compliant, FDA registered facility. Every batch of each Nutricost product undergoes testing by independent (3rd party) ISO-accredited laboratories to insure a quality product. Nutricost, located and headquartered in the USA, only uses the best ingredients to ensure maximum quality and to help you feel your best! By keeping our recipes simple and clean, you get the best experience possible with Nutricost. All Nutricost supplements are manufactured in a GMP-compliant and FDA-registered facility, provide high-quality ingredients, and offer a variety of options for your health support. And each batch of every product is tested by independent, ISO-accredited laboratories to ensure safety and quality.