Serum T4
Summary of Serum T4
Primary Information, Benefits, Effects, and Important Facts
Scientific Information on Serum T4
Get the latest information on 400+ supplements and their effects on 500+ health outcomes.
By becoming an Examine Plus member, you'll have access to all of the latest nutrition research. Quickly and easy look up evidence on over 400 supplements across over 500 different health goals, outcomes, conditions, and more.
Human Effect Matrix
The Human Effect Matrix looks at human studies (it excludes animal and in vitro studies) to tell you what supplements affect serum t4.
| Grade | Level of Evidence [show legend] |
|---|---|
|
Robust research conducted with repeated double-blind clinical trials |
|
Multiple studies where at least two are double-blind and placebo controlled |
|
Single double-blind study or multiple cohort studies |
|
Uncontrolled or observational studies only |
|
Level of Evidence
?
The amount of high quality evidence. The more
evidence, the more we can trust the results.
|
Supplement |
Magnitude of effect
?
The direction and size of the supplement's impact on
each outcome. Some supplements can have an increasing effect, others have a decreasing effect, and others have no effect.
|
Consistency of research results
?
Scientific research does not always agree. HIGH or
VERY HIGH means that most of the scientific research agrees.
|
Notes |
|---|---|---|---|---|
|
|
Minor
|
Moderate See all 5 studies |
Supplemental iodine above 500µg appears to be capable of suppressing T4 to a small degree whereas lower doses are not associated with such an effect.
|
|
|
|
- | High See all 5 studies |
Although one study noted a decrease with 600 IU, future studies in similar persons with multiple doses have failed to replicate these observations.
|
|
|
|
Minor
|
Very High See 2 studies |
The decline in T4 hormone levels during prolonged exercise is abolished with supplementation of zin
|
|
|
|
||||
|
|
||||
|
|
||||
|
|
||||
|
|
||||
Get access to the latest nutrition research
By becoming an Examine Plus member, you'll have access to all of the latest nutrition research on over 300 supplements across over 500 different health goals, outcomes, conditions, and more.
