10 Best Vitamin C Supplements 2026 in the United States

The Sports Research High Potency Vitamin C supplement offers 1000 mg of vitamin C per capsule, providing a strong dose suitable for daily immune support and antioxidant benefits. These capsules are vegan, non-GMO verified, gluten-free, and soy-free, making them a good choice for people with dietary restrictions or those who prefer clean supplements without unnecessary fillers. The product comes in a convenient veggie capsule form, which is easy to swallow and free of binders or extra ingredients, supporting better absorption and purity. It is manufactured in a GMP-compliant facility in the USA, ensuring quality assurance.

While this supplement uses ascorbic acid in a straightforward veggie capsule, it ensures reliable absorption for most users. The 240-count bottle offers good value for those looking for a long-lasting supply. This product provides a strong, straightforward option at a reasonable price, especially suitable for vegans or individuals avoiding common allergens.

Dr. Mercola Liposomal Vitamin C comes in capsule form, making it easy to take without worrying about taste since it is unflavored. Each serving delivers a substantial 1,000 mg of vitamin C, which is a strong dose to support your immune system, brain, heart, and eye health. A standout feature is its use of liposomal technology, which helps your body absorb the vitamin more effectively than regular vitamin C supplements, potentially reducing stomach discomfort that some people experience.

The product is non-GMO, gluten-free, and soy-free, which is ideal for those with dietary restrictions or who prefer cleaner supplements. It is presented in a 180-capsule bottle, offering 90 servings, which balances quality with quantity effectively. The brand emphasizes informed health decisions and regenerative practices, appealing to users seeking trusted sources.

This supplement is well-suited for those wanting a potent, easily absorbed vitamin C option without common allergens, especially if they value advanced delivery methods.

Viva Naturals Vitamin C and Zinc supplement offers a strong daily dose with 1000 mg of Vitamin C and 20 mg of Zinc per capsule, which is suitable for adults looking to support their immune system. The supplement comes in vegetarian capsules, making it friendly for those avoiding animal products, and is free from common allergens like gluten and dairy. A notable feature is the use of Quali-C, a premium form of Vitamin C from Scotland, combined with Zinc sulfate, a form known for good absorption, which boosts the bioavailability of these nutrients.

Alongside immune support, the supplement also promotes cellular energy and collagen production, benefiting skin, hair, nails, and joints. The inclusion of citrus bioflavonoids and rose hips adds antioxidant support, which is a plus. The bottle contains 250 capsules, which provides good value for the price per serving, especially if taken daily.

This product represents a strong choice for adults seeking a high-potency Vitamin C and Zinc supplement with clean ingredients and vegetarian capsules, though those looking for certified testing might want to verify further.