A stable form of vitamin C, used in our formulas for the look of uneven tone. In the trial we cite, a lotion carrying a vitamin C derivative, ascorbyl glucoside with arginine, lightened sun spots on the face more than a placebo lotion over 24 weeks.

Glow in the formula

Stable Vitamin C sits in our formulas for one job: evening the look of tone. We file it under Brightening in this glossary for the job we use it for, and the evidence section below says how far its source goes.

Glow in the vitamin

The mechanism is the one stated in the summary above, and we have deliberately not extended it. Where a supplier or a competitor would reach for a bigger promise, the sentence we publish stops where the research stops.

Glow in the evidence

Our source is a randomised controlled trial published in an indexed journal, recorded as Takada 2024 PMID 39769217. You can read it yourself at PubMed 39769217. We grade that as the strongest kind of evidence we recognise.

Glow and its limits

The research behind Stable Vitamin C studies the ingredient, not the finished Opuliss product it sits in. It is not a trial of our formula, and we will not present it as one.

Cosmetic claims describe how skin looks and feels. Nothing here is a medical claim, and nothing here treats a condition.