Ben Lynch (author of the book Dirty Genes ) reports that those who are born with the MTHFR gene variation may also have some advantages, such as being more alert, productive, and focused
Possible B12 injection side effects tend to be mild and short-lived, and may include: Injection site pain, redness, or swelling Mild itching Brief diarrhea (less common) A feeling of warmth after the injection Serious side effects are rare
Factors like dosage, timing, absorption, and individual nutritional needs can make a big difference in your results
Because TB-500 is also sold outside regulated pharmaceutical systems, there are real concerns about purity, contamination, and consistency
(1991) Nature 350 614
Food supplements Food Standards Agency