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Although a Statistics Canada population survey published in 2013 found, on average, seniors had only slightly lower levels of B12 than younger adults

Internationally , similar regulatory timelines apply

12th June 2020 The MHRA allows clinics and individuals to market B12 injections by using the words wellness or boost or supplement but not deficiency, they absolutely cannot be marketed with medical claims, and this is the bit that makes NO SENSE whatsoever, because we with B12 deficiency keep being told they are a Prescription Only Medicine

Hydroxocobalamin is another highly bioavailable natural form frequently administered via injection due to its excellent retention in the bloodstream