Vitamin C Powder 5,000 mg from Thompson helps you get your vitamin C without any large pills to swallow. Vitamin C functions within the body as an antioxidant, helping to fight off free radicals which can age and damage the cells of the body. It also supports a healthy immune system and the tissues of the body. Thompson's Vitamin C Powder 5,000 mg provides a potent dose of this important vitamin per serving for optimum benefits. Vitamin C Powder 5,000 mg from Thompson is an unflavored powder that can be mixed with non-carbonated juice or water without affecting the taste.