This is a good video, but please get trained by a medical professional
Tirzepatide niacinamide complete guide explains the rationale: niacinamide (vitamin B3) supports cellular energy metabolism and may enhance insulin sensitivity independently
Immunocompromised patients should insist on either an FDA-approved product or a 503B-registered compounder
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A supplemental nutritive source of vitamin B12 for cattle, horses, sheep, swine, dogs, and cats. The suggested dosage for cattle, horses, sheep, and swine is 1 to 2 ml; for dogs and cats is 0.25 to 0.50 ml. Administer IM or SQ. Suggested dosage may be repeated at 1 to 2-week intervals, as indicated by condition and response
So glad I found a way to get these shots at home