PLUMP YOUR LIPS

Cause

Smoking and exposure to the sun lead to thinning lips and those annoying lines that lipstick bleeds into.Some people have them that don't even smoke.

Do-it-yourself fix

Lip glosses laced with ingredients that temporarily supersize your kisser. The ginger and cinnamon in DuWop's Lip Venom, $15, increase circulation, leaving lips more luscious (and tingly feeling). Jeni Lee's Get Lip, $38, sexily plumps your pucker with L-Arginine, an amino acid.

M.D. methods

Collagen, a protein derived from cows that is injected into lips and their borders to instantly plump them up -- and knock out lip lines in the process. (For an instant image, think Melanie Griffith and Goldie Hawn, two celebs whose kissers are reported to be collagen-enhanced.) Recently other lip "fillers" have come on the market, including Restylan, AlloDerm and Gore-Tex. But collagen remains the best option if it's your first time plumping up: "Collagen has been around for a very long time," says Oleh Slupchynskyj, M.D., a founder of the Aesthetic Institute of New York, "so we know it's safe. It's not permanent, and it's less expensive than other forms of lip augmentation" (from $350, lasting three to four months). Don't bother trying Toki, a lemonade-flavored skin-plumping cocktail. According to Bank, it's "nonsense" that anything you ingest can target the skin, so it's beyond unlikely that Toki's active ingredient, a collagen peptide, can actually be absorbed into the bloodstream and delivered directly to skin cells, where it's supposed to trigger the collagen production. Anyway, the price, $195 for a one-month supply of daily drinks, is enough to choke you.