Hormones, thyroid and fertility
Iodineand Total Thyroxine (Total T4)
Only one source here so far, and it measured higher total Thyroxine (Total T4).
How sure anyone can be
Low certainty, level 2 of 4Further research is likely to change this.
The numbers reported
- 40 percent change
- percent higher mean total thyroxine at 24 weeks
None of these sources gave a likely range — the band the real answer probably sits in — so how precise these numbers are is still an open question here.
One source, newest first
What we read is the published abstract, not the full paper, so a blank below may still be printed in the paper itself. A fixed rule worked this out from the source’s own fields. Nobody checked this rating by hand.
Randomised trial, 2006 · 310 participants
Low certainty, level 2 of 4Iodine supplementation improves cognition in iodine-deficient schoolchildren in Albania: a randomized, controlled, double-blind study.
Am J Clin Nutr. 2006;83(1):108-14. doi:10.1093/ajcn/83.1.108. PMID:16400058.
- Number reported
- 40 percent change
- Which way it went
- Higher
- Likely range
- Not in the abstract
- Source’s own words
- percent higher mean total thyroxine at 24 weeks
- Who was studied
- Child
- Compared with
- placebo
- Amount taken
- 400 mg iodine, single oral dose of iodized oil
- For how long
- 168 days
- Disagreement between studies
- Not in the abstract
- Kind of record
- Journal article
How this rating was reachedstarts at High, 2 steps down: risk of bias and imprecision
- Starts at High
- Risk of bias brought it down to Moderatethe abstract reports no risk-of-bias or quality appraisal, so study limitations cannot be ruled outNot in the abstract
- Imprecision brought it down to Lowthe abstract reports no confidence interval for the estimateNot in the abstract
- Ends at Low2 steps down.
- Checked, nothing to step it down for
- indirectness
- Inconsistency
- One study, so there was nothing to disagree
Imprecision stops at the first check that applies; others may apply too.
AI review could not confirm it — an AI agent re-read this finding against the saved source and at least one check failed. The batch record names the check and quotes the sentence that caused the doubt. No person read it.
What is still missing from these readings
- One gives no likely range, so how precise that number is is unknown.
Something nobody wrote down is never a zero and never a guess.
Still to read for Iodine
One of the six things on our list for Iodine has no reading here yet:
- Iodine, Serum
Still to read means nobody here has got to it, not that it was tried and did nothing or that no research exists. A pairing on no list is not a gap: we never set out to read it.
Read next
Iodine
Four other questions read for it
Hormones, thyroid and fertility
27 questions read under it
Total Thyroxine (Total T4)
No other ingredients read against it
Alphabetical, and by nothing else.
This is a library, not advice. No recommendation, no dose, no diagnosis, no ranking. We never ask about your symptoms, and nothing here is tailored to you.