In the case of 32 samples, the percentage of preparation mass
dissolved in the buffer solution ranged from 0% to 50%. In the case
of 27 preparations, the value of supplement mass dissolved in the
buffer solution was from 50.1% to 75%. For 21 preparations, from
75.1% to 90% of supplement mass was dissolved in the buffer solution.
In the case of six samples, the highest percentage of dissolved
mass ranged from 90.1% to 99%. Together, these suggest substances
in dietary supplements are only partly available to be absorbed by
the organism.