Dose tells you what the manufacturer put in the capsule. Bioavailability tells you what reaches your bloodstream — and the gap between the two is where most supplements fail. In this piece, we trace three case studies across the B-vitamin family, showing why methylated forms outperform their cyanocobalamin counterparts in absorption studies, and why the cheapest version on the shelf is rarely the most effective.
If you'd like the full reading list and clinical references for this piece, our research team can send a copy on request — just drop us a line.