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For first-time users, the published evidence base is strongest on topical at 1 to 2%
Vitamin B12 is water-soluble
However, the percentage weve seen usually exceeds this number
Are these treatments FDA-regulated or prescription-based
Metformin, a common diabetic drug is also a cause of B12 deficiency
synthesized by certain bacteria Although the intestinal flora of humans is able to synthesize vitamin B 12 , humans are not able to absorb bacteria-generated vitamin B 12 since the location of synthesis (the colon) is too distal from the location of absorption (the small intestine)
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