Kosas's GrowPotion is a viral brow growth serum celebrated in many GRWM videos, favored for its clean beauty credentials. This vegan and cruelty-free formula is 97 percent naturally derived, containing key ingredients like hyaluronic acid, vegan keratin, and peptides. Notably, it also enhances lash thickness and length. Customers praise its effectiveness, with one reviewer noting visible improvement in an overplucked eyebrow, highlighting balanced regrowth and sustained results. The peptide trio, vegan keratin, and provitamin B5 work synergistically to promote healthier brows.