Other systemic illnesses, such as diabetes and hyperthyroidism, or organ diseases affecting the liver and kidneys, can also contribute to deficiency by either preventing normal absorption or disrupting vitamin storage
Vitamin B12 is water soluble, meaning as long as you are taking "prescription-grade" drops, you do not have to worry that the levels are going to be diluted as they pass through your bloodstream
These changes can increase the risk of severe illness from infections such as COVID-19 and influenza
First, check your multivitamin to make sure that the dose of vitamin B12 (cobalamin) is under 1,000 mcg (aka 1 mg)
Vitamin B1 B6 B12 Injection In addition to standalone vitamin B12 injections, some formulations combine vitamins B1, B6, and B12