Mass gainer protein powders, also called weight gain protein powders, are specifically formulated for athletes and weightlifters looking to pack on pounds, particularly lean muscle mass. Unlike ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Toby Walters is a financial writer, investor, and lifelong learner. He has a passion for ...

Rebecca Jaspan is a registered dietitian specializing in anorexia, binge eating disorder, and bulimia, as well as disordered eating and orthorexia. Nick Blackmer is a librarian, fact-checker, and ...