With more than 1,000 reviews and 173,000 loves from Sephora shoppers, the Hyaluronic Acid 2% + B5 ($7-$13) is a definite crowd-pleaser. It features hyaluronic acid in low, medium, and high molecular weights to provide immediate and longer-lasting results both on the surface and deeper into the skin. There's also a hyaluronic acid cross-polymer that helps hold moisture in even longer.