- Quality 1st High Concentration Vitamin C Serum
- Intensive Brightening serum 30ml
- Cartons pack 36 vitamin C serums
- Beside niacinamide and retinol serums

Quality 1st Queen Secret Quality First High Concentration Vitamin C Intensive Brightening Serum is a 30ml serum from the Japanese brand Quality 1st. Vitamin C and Intensive Brightening come from the product name. It is applied to the face after lotion.
Each export carton contains 36 bottles of 30ml. Ground Biotech supplies this vitamin C serum wholesale for export to importers, distributors and Asian supermarkets, and it sits next to the niacinamide and retinol serums of the same series.