can b12 injections make you nauseous Nauseous? Vitamin B12 Side Effects Stomach:

Endotoxin control is critical for minimizing biological interference and maintaining integrity in sensitive analytical systems

Some individuals might only need injections once or twice a year

Dietary adjustments may be an alternative if you are not severely deficient.

These studies show that people with higher levels of vitamin D have a lower risk of disease, although they do not definitively prove that lack of vitamin D causes disease or that vitamin D supplements would lower risk

But here are some general guidelines: Severe deficiencies: Daily shots for 1 week, then weekly shots until levels normalize Moderate deficiencies: Weekly shots until the deficiency is corrected Maintenance dosing : Monthly shots to keep B12 levels optimal Its definitely possible to take B12 shots too often