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Guo C, Hao C, Shao R, Fang B, Correa AM, Hofstetter WL, Roth JA, Behrens C, Kalhor N, Wistuba II, Swisher SG , Pataer A
Vitamin B12 Fact Sheet for Health Professionals. Office of Dietary Supplements, NIH, 11 March 2021, [Full Article] Mayo Clinic
They do not differ in the fundamental constraint: molecules above roughly 500 daltons don't cross intact stratum corneum passively, and the botanicals that do fit under that threshold arrive at doses two to three orders of magnitude below anything studied
Gradual Dosage Increase : Treatment begins with a minimal dose that is slowly increased to achieve the best balance between efficacy and tolerability
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