self administer intramuscular thigh vitamin b12 injection site Optimal Sites for Maximum Absorption and Benefits Vastus Lateralis Intramuscular Injection -

[73] As noted above, the completely synthetic laboratory synthesis of B 12 was achieved by Robert Burns Woodward and Albert Eschenmoser in 1972, though this process has no commercial potential, requiring more than 70 steps and having a yield well below 0.01%

If breast milk or baby food does not contain enough of the vitamin, a severe deficiency can occur within a few weeks

No hormones

It's not clear how you get PA, though genetic and environmental factors may play a role

Lipotropic injections consist of various vitamins, nutrients, and branched-chain amino acids (BCAAs) purportedly used to aid in weight loss

Is methylcobalamin a natural form of B12