Biotin is water soluble. These symptoms have only been observed in persons eating large amounts of raw egg whites. Symptoms of toxicity have not been observed.
Storage is non existent.
It is needed at every meal because it must be eaten every day stays only in the system about 5 hours has very little chance of building up to toxic levels is absorbed easily excess is excreted in the urine is very fragile and can be destroyed by light, heat, acids, alkalis, and even air. Excretion is through the urine. No more Ceasar salads. No more raw eggs in your Orange Julius.