give vitamin b12 injection video How to Administer an Intramuscular at Home VIDEO: How Can Vitamin B12

When serum B12 is normal but MMA is elevated, this may indicate a functional B12 deficiency and may be treated with high-dose injections of vitamin B12, which help bypass barriers to absorption

Retrieved 8 March 2023

It's definitely not an over-the-counter solution, but for the right person, it can be very effective

Why to avoid with MTHFR: Requires multiple conversion steps to become active MTHFR mutations impair these conversions Contains cyanide (though small amount) Least bioavailable form Found in most cheap multivitamins and fortified foods Bottom line: Choose methylcobalamin, hydroxocobalamin, or adenosylcobalamin instead