Youll also want to ensure it is 100% pure B12 no additives or preservatives whatsoever
Therefore, its worth asking your doctor to also check your active vitamin B12 levels (also known as holotranscobalamin II) and blood or urine levels of methylmalonic acid (5)
Testing before treatment is not just a best practice it is the standard recommended by the NIH, the AAFP, and the NICE clinical guideline NG239 (2024)
2 to 3 Months and Beyond: Long-Term Support Some of the deeper benefits take longer because they involve slower repair processes, especially in the nervous system
Your body doesnt naturally make B12, so you get it from eating animal byproducts, or supplementing
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