D-Biotin
D-Biotin is a tier 1 form of Biotin (Vitamin B7), used in 9,468 on-market products .
9,468
on-market products
tier 1
quality tier
n/a
elemental fraction
Why this tier: D-biotin is the only one of biotin's eight possible stereoisomers with vitamin activity, both the naturally occurring form in food and the form targeted by commercial synthesis (per USP monograph) -- bare "Biotin" (the largest raw_form bucket, ~15,405 rows) is treated as the same molecule.
Source: General biochemistry consensus on biotin stereochemistry; no comparative study needed since other stereoisomers aren't marketed as vitamins