numbuzin
No.5 Vitamin Concentrated Serum
A medium holy trinity active for hyperpigmentation and aging, built around Vitamin C and PHA, with reviewed formula data, and some patch-test cautions.
Routine step
Serums & Treatments
Category
Holy Trinity Active
When to use
Morning or night
Skin fit
Dark spots
10/10
Aging
9/10
Dullness
9/10
Pores
3/10
Best for
Key ingredients
Ascorbic Acid
Brightening, firmer-looking skin support, and antioxidant
Niacinamide
Reduces melanosome transfer and strengthens barrier
Tranexamic Acid
Inhibits melanin synthesis and reduces hyperpigmentation
Cautions
Sensitive skin may sting. Patch-test before using it all over.
Formula checked
Koracle has a reviewed ingredient source for this product.
Checked 2026-04-30
Available
Check current price before you buy.
Koracle is skincare education, not medical or dermatology advice. Patch-test new products. Ask a licensed dermatologist about acne, rosacea, eczema, allergic reactions, pregnancy concerns, or symptoms that persist.