Ascorbic Acid capsules provide a high potency vitamin C supplement that supports immune health and tissue repair, supported by Thorne's quality standards and trusted practitioner heritage. These vitamin C supplements show Thorne's commitment to quality, proven sourcing, and rigorous standards trusted by practitioners. Thorough third party testing ensures label accuracy and purity. For busy lives, a simple capsule slots easily into your daily routine.

Available Sizes & Variants:

60 capsules - high potency vitamin C supplement in a vegetarian capsule.

Benefits & Features:

• 1,000 mg vitamin C per capsule helps immune health.
• A key role in collagen synthesis supports skin, cartilage and wound healing.
• Antioxidant protection helps counter free radicals, supporting cellular health and lasting vitality.
• Divided dosing can improve absorption, and evidence suggests better immune support when daily intake is divided between morning and evening, helping maintain steady vitamin C levels.
• Clear labeling and allergen-free formulation make it easy to stay compliant with dietary needs.

Thorne's Ascorbic Acid capsules reflect the brand’s commitment to quality through GMP certified manufacturing and routine third party testing for contaminants. Vegetarian and clearly labelled, they are built for reliable daily use with traceable sourcing. Research supports the immune and tissue benefits of 1,000 mg daily, with Dr. Harri Hemilä of University of Helsinki observing shortened cold duration in trials. Not diet pills, these are vitamin C supplements for daily wellness.

(other) Calcium Laurate, Cellulose, Hypromellose Capsule

• GTIN: 693749012498
• Manufacturer: Thorne
• Categories: Best SellersNew ArrivalsPopular Supplement BrandsSubscribe & Save ProductsThorne Supplements
• 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.

Take one capsule daily, or as directed by your healthcare provider. The normal course is to begin with an ‘intensive course’ of 2-capsules every day for 30-days (that’s 60 capsules in total) and to then proceed each additional month at 2-capsules each day for 10-days (that’s 20 capsules in-total). To give a specific date\, we would recommend using the last 10-days of the month that follows the end of the intensive course.
A small number of people with special needs may require a doubling of the above doses\, i.e. 2-capsules twice daily for 30-days\, followed by 2-capsules twice daily for 10-days each month.

Maintenance Dose:
Take 2 capsules once a day during meals for 10 days. Depending on severity of condition\, repeat every 3 months.

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

The Active Ingredient Is: Vitamin C (Ascorbic Acid)

Vitamin C, also called ascorbic acid, is an essential nutrient involved in everyday metabolic and bodily processes. This product presents a high-potency, single-ingredient vitamin C supplement in the form of ascorbic acid.

This form is a straightforward ascorbic acid-based preparation designed to deliver a pure source of vitamin C for supporting daily biological needs.

What Does Vitamin C Do?

Vitamin C helps support immune function and is involved in collagen formation, assisting with skin and tissue health. It also contributes to antioxidant protection, aligning with EFSA and NHS guidance on nutrient roles.

Dr. Hemilä of the University of Jyväskylä found that vitamin C supplementation can reduce the duration and severity of upper respiratory infections, illustrating its role in supporting immune health.

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

Thorne provides evidence-based formulation know-how that fits Welzo’s strict supplier criteria. The brand rests on GMP-certified manufacturing facilities and broad third-party testing for contaminants and label accuracy, reflecting a long-standing commitment to safety and potency. Thorne is recognised as a trusted practitioner brand with wide market acceptance in regulated countries, reinforcing its credibility as a reliable partner for high-quality vitamins.

This brand stands out in our evaluation for its clear emphasis on sourcing integrity, manufacturing traceability, and a consumer-ready product philosophy.

Thorne’s dedication to rigorous quality standards is complemented by its position as a leading name in practitioner-focused supplements, making it a natural fit for Welzo customers seeking high-dose, single-ingredient vitamin C offerings.

For the product itself, Thorne’s Ascorbic Acid is the highest-dose encapsulated vitamin C option in their range, delivering 1,000 mg per capsule with a transparent ingredients list and vegetarian capsule shell, which aligns with Welzo’s focus on clean, well-supported formulations. This brand was evaluated by our team of medical experts for compliance with the standards we enforce, and is well suited to the British market through its regulated, quality-driven approach.