I received an injection of 1mg Methylcobalamin and soon after pissed beautiful pink urine. A week later I tried an equal injection of Hydroxocobalamin without any sign of excretion in my urine. Does this mean that HydroxyB12 is stored by the body (since it's the form found in food) while MethylB12 is used immediately by an active process? I did experience a bout of euphoria and relaxation after the Methyl- which quickly passed. Hydroxo- did not produce any noticeable effects/symptoms.