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The recognised normal level of B12 in the UK is considerably lower than the normal levels accepted in other developed countries such as America, Canada and Japan
According to the manufacturer, the active ingredient in the RX B12 liquid is 250 micrograms of Vitamin B-12 (cyanocobalamin)
The most performance-relevant outcome is improved oxygen delivery, because B12 deficiency directly causes anemia and reduced VO2 max regardless of training
See our BPC-157 storage guide for a concrete example of how this works in a multi-vial protocol
Total cost: $19.99, nothing more
Treatment with methylcobalamin or hydroxocobalamin may unmask this condition
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