effects of too much b12 injections How Long Do The Side Last Why do I feel so bad after a B12 injection? Understanding the B12 Vitamin Shot:

[Pernicious anemia: masking of B12 vitamin deficiency by folic acid]

(2015) Effects of prostaglandin E1 plus methylcobalamin alone and in combination with lipoic acid on nerve conduction velocity in patients with diabetic peripheral neuropathy: A meta-analysis

HUBERMAN: To the hypothalamus, from the hypothalamus to the pituitary, and then the melanocyte-stimulating hormone is then released into the bloodstream, can travel to the melanocytes and cause pigmentation of the skin

This preparation contains 100 mg of high purity lyophilized peptide supplied in a sealed research vial

I figure if something was terribly wrong, it would show up in some other test

Freezing reconstituted peptides is generally discouraged because freeze-thaw cycles can cause aggregation and loss of activity