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Heart Rate

Heart Rate is a term used to refer to the amount of beats a heart gives in X amount of time, usually a minute. Heart rate is variable, and should be constant; arrythmia (irregular beats) are a cause for concern, and some supplements (usually stimulants) influence Heart Rate.

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Human Effect Matrix

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The Human Effect Matrix looks at human studies to tell you what supplements affect Heart Rate.

Full details on all Heart Rate supplements are available to Examine members.
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.
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
grade-b Minor High See all 6 studies
An increase in heart rate is noted, but not wholly consistent. It appears to affect those with lower caffeine tolerance or high overdoses of caffeine
grade-b Minor Moderate See all 5 studies
An increase in heart rate is present following ephedrine administration which correlates well with its psychostimulatory properties; this is not 100% reliable, and heart rate increases may not occur
grade-b Minor - See study
A small decrease in heart rate may occur following grape seed extract, although the studies are currently in persons with metabolic syndrome and not healthy persons

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