Hemoglobin Research Analysis

Summary of Hemoglobin

Scientific Information on Hemoglobin

The Human Effect Matrix looks at human studies (it excludes animal and in vitro studies) to tell you what supplements affect hemoglobin

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

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
L-Carnitine	-	- See study
Ashwagandha	Minor	- See study	A slight but significant 6.3% increase in hemoglobin has been detected in otherwise healthy persons given ashwagandha daily for a period of 60 days.
Saffron	Minor	- See study	Hemoglobin has been noted to be decreased in one study and thought to be related to possible toxic effects of moderately high dose saffron (60mg for more than 8 weeks).
Colostrum	-	Very High See 2 studies	There does not appear to be an inherent increase in hemoglobin with colostrum, although when it successfully treated HIV-associated diarrhea an increase in hemoglobin was noted once (thought to partially underlie the reduction in fatigue).
Lactobacillus reuteri
Vitamin E
Vitamin D

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

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