If you're a so-called "hard gainer," a skinny guy who struggles to add weight to the scale, who fights hard for every added pound of muscle, you're in luck: there's a product designed specifically to ...

If you're struggling to put on size in the gym, using the excuse of being a 'hard-gainer' or 'low-responder' might not cut it anymore. That's because new research suggests lifestyle factors, rather ...