Ingredient field notes · Uneven tone and antioxidant care
Vitamin C: read beyond the label.
Vitamin C is a family of ingredients in skincare. The form matters: ascorbic acid and a vitamin C derivative are not identical labels for the same formula.
What the name means
Ascorbic acid is the ingredient behind many pure vitamin C claims. Derivatives have different names; do not assume they have identical evidence or potency.
Clinical context: AAD: vitamin C and skincare. Ingredient research does not establish that every finished product delivers the same result.
What to check on your bottle
Read the INCI name rather than relying on a vitamin C badge. Packaging, formulation and stability matter alongside the percentage advertised.
Names recognized by Rhune
ascorbic acid · l-ascorbic acid · vitamin c · acido ascorbico
These are lookup terms from Rhune's catalog, including common names. They are not a list of clinically interchangeable products.
Before adding it to your routine
An acidic serum may irritate sensitive skin. Follow its directions and keep sun protection in the routine; vitamin C is not a sunscreen.
What to track
Track uneven tone in consistent light. A brighter looking photo after application does not establish a lasting change in pigmentation.