what's in b12 injections Where Can You Inject Where is the best place to inject a B12 shot? How Long Does a Vitamin

Reddit threads on r/Biohackers describe it landing between weeks 3 and 5 most often

Muscle weakness, steroid myopathy, reduction of muscle mass, osteoporosis, vertebral compression fractures, fractures of the femoral or humeral head, pathological fractures of long bones

CNS neuroscience & therapeutics, 26(1), 5-13

DNA was not isolated from the first two samples collected in the LD/LD-V group, and the first sample collected in each of the other respective groups, due to the use of saline to flush the cecum (after weighing) during early collection (therefore, n = 25 cecal samples)

Transdermal forms of vitamin B 12 are available over the counter, but this route of administration has not been validated clinically in the setting of vitamin B 12 deficiency and should not be relied upon for treatment

However, it's still important to follow your healthcare provider's dosage recommendations