For daily immune and antioxidant support, two capsules give you 1,000 mg of **Vitamin C** — right in the middle of the clinical range (250–2,000 mg) and a well-supported dose. You can also take just one capsule on lighter days and still get 500 mg, which is above the clinical minimum. Each capsule adds 200 mg of **citrus bioflavonoids** as a modest complement.

Ester-C is positioned as a premium, stomach-friendly form of vitamin C, but the clinical evidence supporting meaningful absorption advantages is thin. It works fine as a vitamin C source, but you shouldn't expect a significant edge from the form itself.

At the full two-capsule dose, you're well under the 2,000 mg tolerable upper limit, which gives you room if you get vitamin C from other sources too. The capsules are gelatin-based, so they're not suitable for vegetarian or vegan diets.