THORNE High Potency Vitamin C 42 Servings
- Form: Powder
- Supplement Type: Vitamin C
- Diet: Gluten Free
- Allergens: Dairy Free, Fish Free, Shellfish Free, Soy Free
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A buffered, unflavored vitamin C powder for people scaling their own dose, third-party tested and free of the usual allergens.
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ASIN: B005IZIXC4Category: Vitamin C Supplements
Overview
THORNE's High Potency Vitamin C is an unflavored ascorbic acid powder that adds calcium, magnesium and potassium to reduce the acidity plain vitamin C powders carry. Third-party certified and free of gluten, dairy and soy, it suits anyone who wants a mixable dose rather than a pill count.
8.32 ounces works out to roughly 42 servings by Thorne's own count, and the powder format lets you dial the dose into water, juice or a shake rather than swallowing multiple capsules. The added mineral ascorbates buffer the acid, which is the main reason people pick a buffered powder over plain ascorbic acid tablets.
- 8.32 oz powder, about 42 servings
- Calcium, magnesium and potassium added
- Gluten, dairy and soy free
- Third-party certified
Who it's for
Fits people managing a higher daily vitamin C intake who find capsules cumbersome, or anyone whose stomach reacts to unbuffered ascorbic acid. Not aimed at someone who just wants a once-a-day pill with no measuring involved.
Pros and cons
- Buffered formula eases stomach acidity
- Unflavored, mixes into any drink
- Free of gluten, dairy and soy
- Third-party certified for potency and purity
- Requires measuring rather than a fixed capsule dose
- No flavor means it's less palatable taken alone in water
Performance notes
Ascorbic acid buffered with calcium, magnesium and potassium is gentler on the stomach than unbuffered vitamin C at high doses, since the minerals neutralize some of the acidity before it hits the gut. Being unflavored, it dissolves into whatever liquid you choose without adding sweetness.
Specifications
| Brand | THORNE |
|---|---|
| Form | Powder |
| Supplement Type | Vitamin C |
| Diet | Gluten Free |
| Allergens | Dairy Free, Fish Free, Shellfish Free, Soy Free |
| Count | 0.52 pounds |
| Flavor | Unflavored |
| Benefits | Antioxidant Support |
Frequently asked questions
Is THORNE's High Potency Vitamin C powder flavored?
No, it's unflavored, meant to be mixed into water, juice or a shake.
What minerals are added to this vitamin C powder?
Calcium, magnesium and potassium ascorbates are included to buffer the acidity of the ascorbic acid.
Is this product dairy and soy free?
Yes, Thorne lists it as gluten, dairy and soy free.