Recovery is key. Supplements will help you recover, but nothing can really compare to sleep. Sleeping balances your metabolism and hormones. When you sleep less than 7 hours a night you will likely see decrease in weightloss and in some cases you might gain weight rather than lose it. It is necessary to sleep 7-9 hours each night to ensure that you are not tired. Not only will this help you recover quicker but you will not be lazy at the gym. Sleep more, lose more, and feel better inside and outside the gym.