Vitamin C

Vitamin shopping page is not one SKU. It shows up as face serums, drink mixes, gummies, and capsules, so the first filter is use: skin or swallow. People who typed the bare ingredient usually want to scan formats before they lock a brand.

• Format: dropper serum versus capsules, gummies, or powder sticks.
• Form on the label: ascorbic acid, ascorbyl glucoside, or sodium ascorbyl phosphate, plus whether a milligram or percentage is printed.
• Pairings: vitamin E and ferulic acid in topicals, or mineral blends in supplements, versus a single-ingredient listing.

Decide topical or oral first, then compare two products in the same format so percentage and milligram claims are actually comparable.