Vitamin C 1,000 mg (formerly Ascorbic Acid)
Scored by the Formulate Research Team · Last reviewed July 2026
Overview: Thorne Vitamin C 1,000 mg (formerly Ascorbic Acid)
Provides antioxidant and immune support, while also promoting healthy, glowing skin* Get support for healthy skin and optimal whole-body wellness with Vitamin C – a vitamin that promotes healthy immune function and collagen production.*
Score Breakdown
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Ingredients per Serving
Certifications & Testing
Other Ingredients
Hypromellose (derived from cellulose) capsule, Calcium Laurate, Cellulose
Recommended Use
Take 1 capsule daily or as recommended by your health-care practitioner.
Warnings
ALLERGY WARNING This product is contraindicated in a individual with a history of hypersensitivity to any of its ingredients. PREGNANCY If pregnant, consult your health-care practitioner before using this product. INTERACTIONS There are no known interactions or contraindications at publication date. OTHER WARNINGS Vitamin C can cause diarrhea in some individuals in large doses, which can vary from
Frequently Asked Questions
What is Thorne Vitamin C 1,000 mg (formerly Ascorbic Acid)'s Formulate score?
Thorne Vitamin C 1,000 mg (formerly Ascorbic Acid) scores 90 out of 100 (grade A) on Formulate's ingredient-level rubric, which weighs evidence quality, dose accuracy, bioavailability, transparency, safety, and manufacturing practices.
Is Thorne Vitamin C 1,000 mg (formerly Ascorbic Acid) worth it?
Thorne Vitamin C 1,000 mg (formerly Ascorbic Acid) scores 90/100 (grade A). That puts it in Formulate's top tier: its ingredient doses, forms, and label transparency hold up against the clinical evidence, and it carries credible third-party testing. Formulate grades every product with the same automated rubric, so the score reflects the formula — not marketing or sponsorships.
What's in Thorne Vitamin C 1,000 mg (formerly Ascorbic Acid)?
Each serving contains Vitamin C (1 g). Serving size: 1 Capsule. 60 servings per container.
How do I take vitamin c 1,000 mg (formerly ascorbic acid)?
Take 1 capsule daily or as recommended by your health-care practitioner.
Who makes Vitamin C 1,000 mg (formerly Ascorbic Acid)?
Vitamin C 1,000 mg (formerly Ascorbic Acid) is made by Thorne. See Formulate's full grade and product lineup for Thorne on its brand page.
Is Thorne Vitamin C 1,000 mg (formerly Ascorbic Acid) third-party tested?
Thorne lists the following certifications and testing for this product: Gluten Free, Soy Free, Dairy Free, Natural Flavors, Natural Colors, Made in USA, Third-Party Contents Certified, Thorne Verified, GMP Certified.
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Disclosure. Formulate may earn a commission from purchases made through links on this page. Commissions never influence scores — every product is graded by the same automated rubric. This page is for educational purposes only and does not replace advice from a qualified healthcare provider.