Uploaded September 2026 | Updated September 2026, 3 hours ago
A new study analyzed 41 vitamin C products containing different forms of vitamin C, including ascorbic acid and several vitamin C derivatives.
Using HPLC, the researchers measured the actual concentrations in the finished products and compared them with the concentrations claimed on the labels.
The results showed quite a bit of variability, including some products with no detectable ascorbic acid and surprising variability among some vitamin C derivatives.
So what does this mean for those “super stable” vitamin C formulas? We break down what the data can—and can't—tell us and why proper storage and consistent use still matter.
And as always, we'd love to know: what vitamin C are you using right now?
A new study analyzed 41 vitamin C products containing different forms of vitamin C, including ascorbic acid and several vitamin C derivatives.
Using HPLC, the researchers measured the actual concentrations in the finished products and compared them with the concentrations claimed on the labels.
The results showed quite a bit of variability, including some products with no detectable ascorbic acid and surprising variability among some vitamin C derivatives.
So what does this mean for those “super stable” vitamin C formulas? We break down what the data can—and can't—tell us and why proper storage and consistent use still matter.
And as always, we'd love to know: what vitamin C are you using right now?
