Purito Seoul Serums & Ampoules

The strengths are on the labels here and they set the order you should try them in. Wonder Releaf Centella, in scented and unscented versions, is the no-acid starting point. Pure Vitamin C and Azelaic Acid 10 percent with kojic acid are the active steps, Timeless Bloom Bakuchiol is the retinol alternative, and the TXA 6 percent with niacinamide 10 percent and retinal serum is the strongest thing on the shelf. One of those three at a time.

Price range

$15.99 to $22.99

Most named actives

Adenosine 9Allantoin 7Niacinamide 7