Buffered C Magnesium Ascorbate Powder - Unflavored

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If conventional vitamin C supplements don't sit well with your stomach, Buffered Magnesium Ascorbate Vitamin C Powder from Swanson Premium is an excellent alternative. Vitamin C is one of the most important dietary antioxidants for maintaining good health, which is why it is among the most widely supplemented vitamins. But for some people, the vitamin's acidity can lead to stomach discomfort, especially at higher intakes. Our formula features vitamin C that's buffered with magnesium to make it gentler on the digestive system.


Supplement Facts

Serving Size 1 Scoop (1 g)

Servings Per Container 113

Amount Per Serving % Daily Value
Vitamin C (as magnesium ascorbate) 830 mg 922%
Magnesium (from magnesium ascorbate) 65 mg 15%

Suggested Use: As a dietary supplement, mix one scoop (1 g) one time per day with water or juice as desired. Scoop included.

Warning: For adults only. Consult your healthcare provider before using this or any product if you are pregnant or nursing, taking medication or have a medical condition.

Storage Instructions: Product contains a desiccant packet to maintain freshness. Do not eat the desiccant packet. Keep out of reach of children. Do not use if seal is broken. Store in a cool, dry place.




  1. How Does Vitamin C Support Immune Health?
    Vitamin C is an essential nutrient that helps support healthy immune function. It plays a role in the normal function of various immune cells and provides antioxidant support to help protect cells from oxidative stress. Because the body cannot produce vitamin C on its own, obtaining adequate amounts through diet and supplementation can help support overall wellness.
  2. Can You Take Too Much Vitamin C?
    Vitamin C is generally well tolerated when used as directed. However, taking more than the recommended amount may increase the likelihood of side effects such as digestive discomfort, including stomach upset or diarrhea. Always follow the suggested serving size on the product label and consult your healthcare provider if you have questions about the appropriate amount of vitamin C for your needs.
  3. Can Vitamin C Be Taken Every Day?
    Yes. Vitamin C is an essential nutrient that many people take daily to help support healthy immune function, antioxidant activity, and overall wellness. Because the body does not store large amounts of vitamin C, consistent daily intake through diet and supplementation can help support nutritional needs. Always use as directed on the product label.
  4. What Is the Difference Between Vitamin C and Buffered Vitamin C?
    Standard vitamin C supplements typically contain ascorbic acid, while buffered vitamin C combines vitamin C with mineral salts such as calcium, magnesium, or potassium to reduce acidity. Some individuals prefer buffered vitamin C because it may be gentler on the stomach.
  5. Why Choose a Powdered Vitamin C Supplement?
    Swanson Buffered Magnesium Ascorbate Vitamin C Powder offers a convenient alternative to capsules and tablets. The easy-to-mix powder format allows you to customize your serving and can be added to water or other beverages for flexible daily use. Many people prefer powdered supplements because they are easy to incorporate into wellness routines and can be a practical option for those who have difficulty swallowing pills.
  6. Is Swanson Sugar-Free Chewable Vitamin C Suitable for Special Diets?
    Swanson Sugar-Free Chewable Vitamin C is vegan and non-GMO, making it a convenient choice for individuals seeking a vitamin C supplement made without genetically modified ingredients. However, this product is not gluten free. Always review the product label for the most current ingredient, allergen, and dietary information before use.
  7. Is Swanson Buffered Magnesium Ascorbate Vitamin C Powder Suitable for Special Diets?
    Yes. Swanson Buffered Magnesium Ascorbate Vitamin C Powder is vegan, non-GMO, and dairy free, making it a convenient option for a variety of dietary preferences and lifestyles. Always review the product label for the most current ingredient, allergen, and dietary information before use.