<s>[INST] i want to have gfuel (gamma) its a energy and focus water suppliment. it does have caffeine for the energy but when i had one today i didnt feel so hyper and i didnt feel like if i was drinking a monster. i have a little heart murmor would it be safe to have one before a test in school so im focused? [/INST] Hello, I have gone through your question. First of you must know what is the underlying lesion responsible for your murmur. There can be many causes of murmur. Some may be mild n being and some may suggest serious defect in heart. As far as supplement you intend to take should be avoided, as at first instance itself it made you uneasy. So better avoid and get echocardiography done to know cause of murmur. My best wishes. </s>