inject b12 Injecting What happens when you vitamin B12? Best Vitamin B12 Injection Site:
Description
Administration of growth hormone (GH), but not insulin-like growth factor-I (IGF-I), by continuous infusion can induce the formation of the 150-kilodalton IGF-binding protein-3 complex in GH-deficient rats

2022, p

Recreational use of nitrous oxide Recreational use of nitrous oxide gas can cause vitamin B12 deficiency

When to Seek Medical Advice About B12 Side Effects Whilst B12 supplementation is generally safe, certain symptoms warrant prompt medical evaluation

You could just get B12 alone and see how you react to that

You need 2.6 micrograms of B12 daily while pregnant and 2.8 mcg while breastfeeding
