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Some are made from a mix of B vitamins, minerals, and amino acids
Oral bioavailability: the numbers that matter Bioavailability refers to the fraction of an administered dose that reaches systemic circulation in an active form
No pharmacy transparency If a provider will not tell you which pharmacy compounds their medication, walk away
This means most of a high-dose supplement remains in the gastrointestinal tract, though the direct link to digestive symptoms is not well established
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