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how long do b12 shot injections last for Does a In Your Body? Why B12 Shots Are Popular
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The key word is cumulative
How prevalent is vitamin B(12) deficiency among vegetarians
We also know that the serum B12 test is inaccurate and cannot tell us what is happening at a cellular level
In addition to this, many people have problems metabolizing B12 in low-quality forms like cyanocobalamin due to defects in the MTHFR gene (1) (as many as 40% of people have THIS problem!)
[73] Streptomyces griseus , a bacterium once thought to be a fungus, was the commercial source of vitamin B 12 for many years
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