Try not drinking it for a week. Just go back to your regular diet. If you still feel like a wet noodle, then it's you. Even if it is made with HFCS, I can't concieve any deleterious effects. I can't imagine why anybody would want to raise the protein of coconut juice (melamine). But stranger things have been known to occur. Maybe this weak feeling is the hump you just need to push yourself over, take a day off to rest and see if that doesn't help. Good luck.