b12 and hcg injections Vitamin in Houston Vitamin for Cattle, Sheep, Swine,

Some individuals simply do not tolerate certain compounds well

[9] Visual disturbances have been reported in patients with Leber hereditary optic neuropathy, and rapid B12 administration may precipitate optic nerve atrophy in this genetically predisposed population, mandating extreme caution or alternative therapy

If you missed a dose of it, take it as soon as you can but never take a double dose

This matters for dosing because beta-3 receptor sensitivity varies throughout the day and in response to nutritional status

Not directly

This is because hypokalemia and thrombocytosis could occur due to the increase in erythrocyte metabolism following vitamin B12 therapy