hi iam dr.nallammai welcome to hcm throat infection is not at all a serious problem,it is fr sure nt related to energy levels, probably u would hv changed ur water,or taken food ouside.. if throat inf nt asso with cold,u can just try salt water gargling or betadine gargling atleast 4 times per day as all reports are normal,u need nt worry even eating lot of food which is unhealthy is harmful..so if u eat little food also..u need nt worry..only thing is that they should b healthy eat lot of fruits and vegs,avoid junk and spicy foods.. keep ur mind cool..dont keep on thinking..think that u r fine, no need take any daily supplements,take healthy food thats it..