“Protein powder is great for vegetarians,” says nutritionist and personal trainer Aynsley Kirshenbaum. Or kids who are picky eaters. Kirshenbaum adds protein powder to her kids’ macaroni and ...

Featured pricing is subject to change. Eat your veggies, kids. But for the adults, you can drink them, too. Greens powders have been popping up all over social media for years, right alongside ...