>Perhaps protein powder if you want to buy supplements. <br> <br>I'm currently taking half a scoop of whey protein before workout, and a full scoop post workout. <br> <br>> Generally you cannot "exchange" muscle for fat or build muscles during a negative calory intake. The exception for this is people who use heavy steroids or some teens. Just technicality, I guess in reality people is on a positive calory intake for some days and then eat less so I guess it works out in the end. <br> <br>Here I'll have to disagree with you. I'm not taking steroids, but my musculature is noticeably bigger, and I'm still losing weight. Bigger muscles, and less fat, I'm call that an exchange. <br> <br>> Good luck anyway and very nice work so far. <br> <br>Thanks