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.

Pure Encapsulations Ascorbic Acid Capsules provide a straightforward and potent dose of vitamin C with 1,000 mg per capsule, suitable for those wanting strong immune and antioxidant support. The capsules are unflavored and gluten-free, appealing to users with dietary restrictions. The product emphasizes purity by avoiding common allergens, artificial ingredients, and GMOs, which is reassuring for those who prefer clean supplements.

Being a capsule form, it’s easy to swallow and convenient to take, with flexibility to adjust daily intake from 1 to 4 capsules depending on your needs. The product uses ascorbic acid as its vitamin C source, which has good bioavailability but might be a bit harsh on sensitive stomachs if taken in high doses.

This supplement is ideal for anyone seeking a high-dose, no-frills vitamin C option focusing on purity and potency.