how safe are vitamin b12 injections Injection | Causes of Fatigue and Energy Support Vitamin B12 injections for MTHFR:

Updated 20242025 formulations from Moderna, PfizerBioNTech, or Novavax are covered for anyone with Medicare, including those who are older or immunocompromised

B12 injection dosage is based on the patients level of deficiency, response to B12 supplementation and medical condition

If you have genetic predispositions affecting nutrient pathways (detectable through tests like PlexusDx's Precision Peptide Genetic Test), this information should inform your provider's recommendation, dosing strategy, and monitoring plan

The deficiency may also occur in pancreatic insufficiency due to an inability to digest protein-bound vitamin B12

To support identifying the cause of vitamin B12 deficiency, doctors need to inquire whether the person adheres to a diet that is low in foods from animal sources and should ask the person about disease history, regular use of certain medications, and recreational use of nitric oxide

If folate deficiency is present, replacement should only be started after initiating B12 therapy to avoid worsening neurological symptoms