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A member asked:
Can any doc explain why can thyroxine be taken orally, but insulin can't?
A doctor has provided 1 answer
Protein digestion: Thyroxine is a small molecule similar to an aminoacid and it gets absorbed intact from the gut. When circulating it then behaves like naturally produced thyroxine. Insulin is a protein digested/broken down into dipeptides and aminoacids. Obviously once broken down and absorbed into the bloodstream it no longer exists as the intact molecule which is needed for its hormonal function.
Answered 6/25/2014
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Related Questions
A member asked:
What does mean if my thyroid result is 18.4 and 1.22 I'm on thyroxine but not sure if this is good my doc said she would like it to be 0.4?
A doctor has provided 1 answer
A member asked:
18 y/o male with hypothyroidism. Diagnosed @ 15. Is this common? Should i just take the Synthroid (thyroxine) are ask doc to further investigate as too why?
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A member asked:
My TSH is .039 new doc changing Synthroid (thyroxine) from 150 to 137 mcg. Is it normal for TSH to fluctuate when you're newly dx?
A doctor has provided 1 answer
A member asked:
I was on 25mcg of Synthroid (thyroxine) for TSH of 4.5 which then normalized and now my TSH went up to 4.25 and doc moved me to 75 mcg. Is that too much?
A doctor has provided 1 answer
A member asked:
100 mcg Synthroid (thyroxine) for yrs.TSH went from 3.84 to 6.35 in 8 months.Doc upped to 125, after 30 days TSH 3.05.now doc wants to raise to 137. This Right?
3 doctors weighed in across 2 answers
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