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Research analysis led by Kamal Patel.
All content reviewed by the Examine.com Team. Published: Jun 28, 2017
Last Updated:

Summary of Hematocrit

Primary Information, Benefits, Effects, and Important Facts

Scientific Information on Hematocrit

Human Effect Matrix

The Human Effect Matrix looks at human studies (it excludes animal and in vitro studies) to tell you what supplements affect hematocrit
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.
grade-b - - See 2 studies
grade-c - - See 2 studies
grade-c - - See study
No significant alterations in hematocrit noted
grade-c - - See study
grade-c - Very High See 2 studies
No significant influence on hematocrit is noted with supplementation of betaine.
grade-c - - See study
Hematocrit does not appear to be significantly influenced with supplementation of vitamin E relative to placebo.
grade-d Minor - See study
Small drops in hematocrit were noted in vitamin D-insufficient healthy people supplemented with 800 IU over 12 weeks.
grade-d - See study
A possible small decrease in one study in healthy, active participants. More research is needed.
grade-d - - See study
No apparent effect in one study.