b12 injection side effects uk Vitamin Injections Why do I feel worse

Although we performed multivariate adjustments, residual confounding may persist due to unmeasured factors such as dietary habits (e.g., irregular intake of animal-derived foods or B12-fortified products), unrecorded use of nutritional supplements, and genetic predispositionsparticularly MTHFR polymorphisms, which are known to influence homocysteine metabolism and folate cycling, thereby potentially altering the functional demand for vitamin B12

We also offer methylcobalamin (the bioactive form) upon special request after a quick consultation with our nursing staff

Heme iron is typically absorbed at a higher rate than non-heme iron, which means that the body more easily absorbs iron from animal products than iron derived from plant foods

High-dose oral B12 can even help overcome mild absorption problems, as some of the vitamin is absorbed passively