THORNE - High Potency Vitamin C - Ascorbic Acid with Calcium, Magnesium & Potassium - Healthy Immune Function & Antioxidant Support* - Third-Party Certified - Gluten, Dairy & Soy-Free - 42 Servings Review

Our scorecard

The overall score is owner satisfaction weighted by how many reviews back it, so a high rating from few reviews counts for less. The bars below show where this model stands against the other home health monitors: bathroom scales, blood pressure monitors, pregnancy and ovulation tests, thermometers, body composition monitors, stethoscopes, glucose monitors and pulse oximeters we track in this category on price, popularity and size. Context, not marks against it, and our read of the data, not a lab test.

Overview

['THORNE High Potency Vitamin C is a powder supplement combining ascorbic acid with calcium, magnesium and potassium, packaged in an 8.32 ounce container that provides 42 servings. THORNE positions the product around third party certification and testing, which is part of its brand identity.', 'The label markets the formula for healthy immune function and antioxidant support, and it is free of gluten, dairy and soy. As a powder rather than a capsule, it requires mixing into water or another liquid, which some buyers prefer for flexible dosing while others find less convenient than a pill.', 'With a 4.5 rating from just under 900 reviews, this product sits toward the lower end of the ratings seen across this vitamin C lineup, though it remains a generally positive score. As with any supplement, particularly one combined with additional minerals, check with a healthcare professional if you take other products with calcium, magnesium or potassium.']

Specifications

Performance notes

This powder formula pairs vitamin C with calcium, magnesium and potassium rather than being a plain ascorbic acid product, which sets it apart from simpler capsule options. The 8.32 ounce container is sized for 42 servings, so it needs mixing into water or a beverage for each use. THORNE's third party testing and broad allergen free labeling are part of what the brand markets as its differentiator.

What buyers say

A 4.5 rating from just under 900 reviews is a decent but more modest result compared to several other vitamin C products in this lineup that reach 4.7 or 4.8. It still points to a largely satisfied buyer base, just with somewhat more mixed feedback than the top performers.