Innisfree is a great K-beauty brand, but peptide line is not that popular. This product is a combination of low-molecule peptides and 10% AHA salt. What does that mean? It contains lactobionic acid which is actually a PHA. But it also contains sodium lactate so - AHA salt. The tube is small, you can apply pea size amount of this product on spots - acne, fine lines. The solution is really gentle, even sensitive skin can use it, but I'm pretty sure Innisfree decided to pull this product from the market.