I eat a lot of raw egg whites, pasteurized from a carton. They are an easy source of protein tat I don't have to cook. I'm sure everyone here can appreciate the temptation of food that is low effort and high in nutrients. Cooking also degrades the protein content in the egg whites. However, I have been looking up biotin deficiency in trying to figure out why my energy has tanked in the last month. From wikipedia entry on biotin deficiency: Eating raw egg whites: Some mistakenly believe that raw egg-white consumption is the only cause of biotin deficiency. Nonetheless, a diet that contains an excess of raw egg whites quickly and almost invariably leads to biotin deficiency. I've been eating/drinking them every day for months with my protein drink. They are the easiest food imaginable and don't seem to cause me any obvious problems but I am beginning to suspect biotin deficiency. I'm ordering a biotin supplement and probably going to cutback the egg whites from twice a day to once a day. Easy liquid food that is pure protein and can be mixed in with other things so it tastes fine... I guess maybe it is too good to be true. Has anyone ever had this experience or even heard of it? This is a weird one for me. PS I can't stand egg yolks and really hate cleaning out frying pans so don't bother trying to sell me on the merits of whole eggs or cooked eggs. Just saying.