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Red Blood Cell Count

Red blood cell count refers to total erythrocytes in serum, and is usually measured in toxicology testing or some instances of anemia. Although higher than average levels of red blood cells can needlessly increase blood pressure, it supports aerobic exercise and oxygen delivery.

Kamal
Research analysis lead by Kamal Patel
All content reviewed by Examine.com Team. Published:
Last Updated:

Human Effect Matrix

The Human Effect Matrix looks at human studies (it excludes animal and in vitro studies) to tell you what supplements affect red blood cell count
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 Vitamin E - Very High See all 4 studies
The overall amount of red blood cells does not appear to be significantly altered with supplemental vitamin E.
grade-c Royal Jelly Minor - See study
At least one study has noted an increase in red blood cell count following ingestion of Royal Jelly
grade-c Saffron Minor Moderate See 2 studies
A decrease in RBCs has been noted in one study suggesting saffron toxicity with prolonged supplementation of a double dose (60mg).
grade-c Astaxanthin  
grade-c Echinacea  
grade-c Garlic  
grade-c Lactobacillus reuteri  
grade-c Spirulina  
grade-c Velvet Antler  
grade-d Nigella sativa  
grade-d Vitamin D  
grade-d Ashwagandha  
grade-d Tetradecyl Thioacetic Acid  

All comparative evidence is now gathered in our ​A-to-Z Supplement Reference.

The evidence for each separate supplement is still freely available ​here.