A method for treating obesity, treating cellulite, reducing wrinkles, increasing skin elasticity, and/or slimming, comprising administering to a subject in need thereof an effective amount of a composition comprising an extract of Maca leaves or leafy stems,
- wherein said extract comprises at least 5% polyphenols by weight, expressed in gallic acid equivalents, with respect to the dry weight of the extract,
- wherein said polyphenols have a flavonoid content greater than 2% expressed in rutin equivalents, with respect to the total dry weight of the extract.