b12 injections in cats Giving Your Cat a Vitamin Boost Vitamin B12 Deficiency in Cats:

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Furthermore, the threshold effect is consistent with the concept that methionine synthase activity may become saturated beyond a certain B12 concentration [17], explaining the diminishing returns observed at higher levels

Efficacy and safety of mecobalamin on peripheral neuropathy: a systematic review and meta-analysis of randomized controlled trials

There are very few experiments that have been undertaken with such dosages on humans

This is an uncommon cause, but multiple case studies show the connection.[ref][ref] Overlapping conditions: POTS + hEDS + MCAS + ME/CFS POTS is a syndrome meaning a collection of symptoms rather than a specific disease

I used to wake up tired, work tired, and go to bed tired like my body never fully charged