why b12 injections instead of pills Vitamin A Vitamin B12 injection is a quick shot that gives your body vitamin B12 directly into the muscle. This helps your body absorb it faster than tablets. Vitamin B12 helps Oral B12 vs. B12 Injections:

Mistake 5: storing medication improperly Leaving your vial on the counter, in a car, in direct sunlight, or in a fridge that cycles above 46 degrees Fahrenheit degrades the medication

doi:10.1210/endo.142.12.8522 Ng FM, Sun J, Sharma L, Libinaka R, Jiang WJ, Gianello R

The BCAAs are transaminated in muscle mitochondria by branched-chain aminotransferase (BCAT), and branched-chain -keto acids (BCKAs, especially -keto acid from leucine) inhibit branched-chain -keto acid dehydrogenase kinase, resulting in elevation of the active state of the rate limiting enzyme branched-chain -keto acid dehydrogenase complex (BCKDH)

Available research indicates it operates through enzymatic modulation rather than hormonal pathways

[21] Furthermore, an animal study in ewes demonstrated that a B 12 , folate and methionine restricted diet around conception, resulted in offspring with higher adiposity, blood pressure and insulin resistance which could be accounted for by altered DNA methylation patterns