High-dose vitamin B12 supplements taken concurrently with the injection may lead to excessive B12 levels, though toxicity from vitamin B12 excess is extremely rare due to its water-soluble nature and efficient renal excretion
And your body will rid itself of any excess of vitamins like riboflavin that dissolve in water
Adequate B12 is linked to better concentration, faster recall, and reduced brain fog, especially in adults over 40, in anyone on a plant-forward diet, and in patients with the MTHFR gene variant that affects how the body processes folate and B12
Before taking, speak with your doctor if you are allergic to vitamin b12, have a genetic condition called optic atrophy, have blood in your urine, polycythemia, an ongoing infection, low iron or folate levels, are pregnant or plan to become pregnant, are breastfeeding or plan to breastfeed