You know that fresh-from-the-gym phenomena when your legs instantly look tighter and your arms more toned? Yep, nothing beats it—and that's why beauty companies have taken pains to recreate the effect through firming products. Now available in lightweight, serum-like formulations, these cellulite smoothers provide an instant (albeit temporary) boost between workouts.
Decléor Aromessence Excellence Youth Activator Body Serum ($85; nordstrom.com) improves the elasticity of mature skin thanks to a blend of plant and essential oils.
Got pesky loose skin even the most targeted exercises can't touch? Mio Skin Tight Tightening Body Serum ($56; bloomingdales.com) might just be the ticket.
Sure, it's not technically a serum, but Philosophy Amazing Grace Firming Body Emulsion ($37; sephora.com) is so lightweight (and non-greasy) that we're willing to let it slide.
Nivea Q10 Skin Firming & Smoothing Serum ($11; drugstore.com) comes with a small price tag, but a big promise—improved firmness in as little as 10 days.
Soap & Glory
Soap & Glory Sit Tight Intense XS ($23; soapandglory.com) is jam-packed with a patented caffeine complex that stimulates circulation and visibly smooths cellulite.
Considered by many to be the gold standard in firming serums, Tracie Martyn Resculpting Body Serum ($98, net-a-porter.com) boosts collagen and strengthens elasticity thanks to its peptide- and amino acid-rich formula.