how much b12 should you inject weekly Vitamin Injection Dosage for Adults: Guidelines B12 Injection Dose: 7 Guidelines
Description
You might try mixing the Vitamin B12 with a small amount of wet food and see if he will eat it

Fischer,

Many notice improved focus and mental sharpness within the first week of treatment

doi: 10.1007/s12603-014-0525-1

Some patients start weekly, then move to monthly maintenance

The cost of Vitamin B12 injections in Miami typically ranges from $25 to $50 per shot, contingent upon the dosage and frequency required
