By definition, subcutaneous injection has high systemic bioavailability
Because methylcobalamin is classed as a nutritional supplement and is not a licensed prescription only medicine in the UK, it is not available via the NHS and is being offered more and more by non-healthcare and non-prescribing practitioners as a treatment for wellness, fatigue, and to boost energy, without making any medical claims around deficiency, and is rarely combined with a supplement of adenosylcobalamin
Track bloodwork (liver/kidney markers) if using long-term
Remember, your genes work when they have to work to do
Similarly, using a morphine withdrawal model in rats, Selank reduced withdrawal symptoms significantly
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