Fant denne også, og dette synes jeg hørtes logisk ut, og sammenfallende med ting jeg har lest og hørt fra før (hvis noen ikke leser engelsk får dere hyle ut, så oversetter vi når det passer sånn):

Some folks chew their tablets, and let the chewed tablet dissolve
sublingually to get around the absorption problems. By taking your
thyroxine sublingually, you won't have to worry about what you
can/can't eat for X number of hours around the dose. You also won't
have to worry about iron and calcium supplements interfering.

Based on the package inserts, absorption ranges somewhere between 40
and 80 percent, which would mean that your getting somewhere between 90
and 180 ug from your 225.