so we're putting him on something called a dexa scanner, which counts how much of ali's body is muscle. you're going to lie down again, and this is one that's going to measure your resting metabolic rate, so we can calculate your energy expenditure. the world of the selfie. now ali's going to go cold turkey on protein supplements for six weeks. instead, professor close has asked him to eat a similar amount of food but, crucially, spread out throughout the day. people think that you can take a protein supplement and suddenly you look like this competition body—builder or this men's health cover model. it couldn't be further from the truth. to get that increase in muscle mass involves really hard training, consistent training, a really good diet and a consistent diet. and thinking that you're going to do it from the supplements, you're just kidding yourself. meanwhile, across the other side of liverpool, we're in a body pump class to chat with some women about how popular protein supplements are with them. it seems to be really common now, more and more people, more and more women taking