Any comparison to lets say 30ml (1 oz) of Lugol's?
From wiki:
Povidone-iodine aka Betadine
Povidone-iodine (PVPI) is a water-soluble complex of Iodine with polyvinylpyrrolidone (PVP), with from 9.0% to 12.0% available iodine
And on PVP:
However the polymer PVP in its pure form is so safe that not only is it edible by humans, but it was used as a blood plasma expander for trauma victims after the first half of 20th century.