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Most of them had no ingredients listed and the few that did only listed a smaller subset of those found in Berrymans B-12 Chemtool
The best approach depends on your personal health history, current medications, symptoms, goals, and clinical evaluation
"Homocysteine levels in morbidly obese patients: its association with waist circumference and insulin resistance"
If you suspect vitamin B12 deficiency neuropathy, do not rely on guesswork
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