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Parathyroid Hormone

Parathyroid hormone (PTH) is a hormone secreted from the parathyroid that negatively influences the actions of Vitamin D and promotes bone loss when in excessive concentrations.

Research analysis led by Kamal Patel.
All content reviewed by the Examine.com Team. Published: Nov 18, 2013
Last Updated:

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Things To Know & Note

Also Known As

PTH

Human Effect Matrix

The Human Effect Matrix looks at human studies (it excludes animal and in vitro studies) to tell you what supplements affect parathyroid hormone
Grade Level of Evidence
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.
Outcome 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
grade-b Strong Very High See all 4 studies
Vitamin D supplementation is the reference drug for reductions in parathyroid hormone due to directly negatively regulating its secretion
grade-c - - See study
Insufficient evidence to support changes in parathyroid hormone from 7-keto supplementation.
grade-d Minor - See study
An increase in parathyroid hormone has been noted with consumption of licorice