Swanson Buffered Vitamin C is a gentle, stomach friendly vitamin supplement delivered as vitamin C tablets, supporting immune health and skin brightness, thanks to calcium buffered ascorbate and citrus bioflavonoids. Calcium buffered ascorbic acid keeps acidity down, making it easier on sensitive stomachs. A citrus bioflavonoid complex may help with absorption and antioxidant support. Swanson's GMP manufacturing and vegan, non-GMO credentials back quality you can trust.

Available Sizes & Variants:

500 mg vitamin C tablets - gentle on the stomach thanks to the buffered form.

250 tablets - convenient daily supply for ongoing immune support.

Benefits & Features:

• Gentle on sensitive stomachs with calcium buffered vitamin C.
• Supports immune health and normal collagen formation with the star ingredient.
• Citrus bioflavonoid complex may help improve absorption and retention of vitamin C in the body, boosting antioxidant protection and vascular health, especially during physical stress.
• Vegan, non-GMO formulation supports ethical choices while ensuring reliable quality.
• Swanson's decades of experience means you get clear ingredient sourcing and reliable lab testing, backed by customer satisfaction guarantees and a commitment to affordable, high quality supplements.

Swanson has a long heritage in reliable supplements, built on clear labeling and strong value. This Buffered Vitamin C uses calcium buffered ascorbate to ease stomach comfort and citrus bioflavonoids for added antioxidant synergy. The product is vegan and non-GMO, manufactured in GMP facilities with routine purity testing, reflecting Swanson's commitment to quality and customer trust in everyday wellness.

Vitamin C (from Calcium Ascorbate), Calcium (from calcium ascorbate), Vitamin C (from Calcium Ascorbate), Calcium (from calcium ascorbate)

• GTIN: 87614019482
• Manufacturer: Swanson
• Categories: Back to School Supplements & EssentialsBest SellersHealth Supplements for Frequent TravelersImmune System Vitamins & SupplementsSubscribe & Save ProductsSwansonVitamin CVitamin C Skincare
• Best buy: 6 - 24 months+

United Kingdom Shipping:

Orders placed by 2pm (Monday to Friday) are dispatched the same day. Orders placed after 2pm will be dispatched the next working day.

Free shipping on orders over £50 to the UK.

Returns: Our products are meant to make you feel healthy and at your best. If you need to return your item, you can do so free of charge within 30 days in the same original and unopened packaging. Subject to T&C's.

As a dietary supplement, take one tablet one to three times per day with food and water. Store in a cool, dry place. 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. Keep out of reach of children. Do not use if seal is broken.

Please consult the product packaging for accurate instructions on how to use the product.

*Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

The Active Ingredient Is: Vitamin C (Calcium ascorbate)

Vitamin C, often known as ascorbic acid, is a water-soluble nutrient that helps in collagen formation and supports normal immune system function. This buffered form uses calcium to cut acidity and improve tolerability, with citrus bioflavonoids contributing to absorption and antioxidant support.

This formulation is vegan and buffering calcium helps to minimise gastric irritation, aiding GI comfort while keeping the nutrient’s role in the body.

What Does Vitamin C (Calcium ascorbate) Do?

Vitamin C helps support normal immune system function and participates in collagen synthesis, linking skin and tissue function with antioxidant protection, in line with EFSA guidance. The calcium buffering and bioflavonoids may aid uptake and utilisation of the nutrient.

Dr. Hemilä of Helsinki University found that vitamin C may influence how long immune-related challenges last and how severe they are in physically stressed individuals, reflecting its role in supporting normal immune function.

This product is not intended to diagnose, treat, cure, or prevent any disease.

Swanson kicks off with a science‑backed, consumer‑focused approach, making Swanson the clear go‑to for this Buffered Vitamin C. When compared with other brands, Swanson stands out for its well‑established market presence and focus on value without compromising quality. A key differentiator is the brand’s emphasis on transparent sourcing and strong quality checks, supported by GMP‑style manufacturing practices and regular purity and potency checks. For this reason, we trust Swanson to bring consistent, dependable ingredients for our customers.

The manufacturer’s reputation for reliability and clear labeling reinforces our decision. Swanson is widely recognised for affordability paired with rigorous standards, building broad consumer trust while maintaining a positive track record in the supplement sector. This combination of heritage and quality focus aligns with our own standards for rigorous evaluation and expert curation. Our panel of medical experts evaluates such strengths through our our team of medical experts and confirms alignment with our quality certification process.

For this product, Swanson’s commitment to manufacturing excellence and safety standards makes it a natural fit for Welzo, ensuring premium quality from ingredient pick to final tablet making.