ordinary glutathione serum Niacinamide 10% + Zinc 1% for Oily Skin free composition means you can use it daily without worry APLB - Glutathione Niacinamide Ampoule

Cruciferous vegetables (broccoli, Brussels sprouts, cabbage), leafy greens (spinach, kale), and allium vegetables (garlic, onions) remain primary dietary sources

Two things to check first

MMPs normally regulate collagen degradation, with MMP-1 specifically implicated in the initiation of collagen fragmentation. A 2024 study found that elevated MMP-1 levels contribute to aging skin, causing in mice: A 2016 study showed that GHK-Cu significantly increased gene expression of MMP-1 and MMP-2 at the lowest concentration. Researchers attributed this as one mechanism by which the peptide increased collagen and elastin production

Don't forget to drink plenty of water too