b12 injections for cows Troy Vitamin Injection 100 mL such as Vitamin B-12 Injection, 3,000 mcg/ml
Description
Here are the most common ways to get your B12 levels back up: Oral Tablets or Capsules : These are a great starting point if your deficiency is mild and likely tied to your diet

PMID 29881591

A study by Li et al

it made me super emotional I have only begun using this, but I feel change beginning as well

Are vitamin injections painful

I think we can safely say the overwhelming answer would be (b)