CHINA-FREE - United C is one of the only Vitamin C products Sourced and Made in the USA VITAMIN C - from Calcium Ascorbate. Compared to ascorbic acid, calcium ascorbate has been shown to have high plasma concentrations 24 h post dose. Therefore, calcium ascorbate was obviously better absorbed and hence present in higher plasma levels than ascorbic acid. IMMUNE SUPPORT - Support when you need it: while we normally get some vitamin c from fresh fruit and vegetables, many of us don't eat a diet which provides us with enough. Now you can give your body nature made vitamin c plus an array of immune-boosting ingredients in one serving. SAFE -Tested & Trusted Ingredients: Our non-gmo, soy-free, gluten-free and dairy-free, Pure Vitamin C formula is manufactured in the USA INGREDIENTS: 545mg of Calcium Ascorbate in each capsule. Other ingredients are: Vegetable Cellulose Capsule, Rice Flour, Magnesium Stearate and Silica. Made in the USA by Eagle Supplements Did you know that 95%+ of all Vitamin C is sourced from China? This may be confusing because the label of your brand says "Made in the USA." Most brands source the raw ingredients from other countries and combine them in the USA. This enables companies to use the "Made in the USA" wording which is purposely confusing to customers. Our United C is "China-Free" and uses ingredients only sourced from the USA and contains NO ingredients from other countries.