b12 injection rx CYANOCOBALAMIN INJECTION, USP 30000 mcg/30 mL (1000 mcg/mL) 30 mL VIAL Cyanocobalamin (Vitamin B12) Injection is sold as an FDA approved generic drug Buy B12 Shots and Injections

Thats where Vitamin B Complex injections come in

For example, if its 500 mcg/mL, 1,000 mcg is 2 mL

for others, it's by having regular injections of B12

The company's product range includes veterinary antibiotics, vaccines, antiparasitic drugs and nutritional supplements, with large-volume non-intravenous injections (including Chinese medicine extracts)/oral solutions (including Chinese medicine extracts), tablets/pills/injections/suspensions and other veterinary drugs to meet the health needs of livestock, poultry and pets

There is no limit for the intake of vitamin B12 because the risk of toxicity or overdoes is extremely low