The Ordinary's "Buffet" ($15-$29) serum highlights several peptide complexes that improve skin's elasticity, firmness, and smoothness, all to tackle a range of ageing signs or help prevent them from forming. This popular product has more than 135,000 loves from other Sephora shoppers and over 800 reviews. There's also an alternative, well-regarded version with copper peptides — "Buffet" + Copper Peptides 1% ($29) — to also aid with collagen synthesis and anti-inflammatory responses in addition to the above.