b12 injection drug interactions Vitamin B12: Symptoms, Dosage & Toxicity Risks Who shouldn't take weight-loss injections?

PMID 1901390

doi:10.1093/ajcn/85.2.460

[95] Intramuscular or intravenous injection [edit] Injection of hydroxycobalamin is often used if digestive absorption is impaired, [2] but this course of action may not be necessary with high-dose oral supplements (such as 0.51.0 mg or more), [97] [98] because with large quantities of the vitamin taken orally, even the 1% to 5% of free crystalline B 12 that is absorbed along the entire intestine by passive diffusion may be sufficient to provide a necessary amount

At first, you might need shots more often

Each bottle contains a steady, easy-to-use amount of GHK-Cu and AHK-Cu in a clean distilled-water base