Synopsis

Source of validity: Scientific
Rating (out of 5): 2

Green algae, particularly species like Chlorella and Spirulina (though Spirulina is technically a cyanobacterium, it's often grouped with green algae in supplements), have been studied for their potential to support or treat anemia, especially iron-deficiency anemia. The scientific rationale is based on their relatively high content of bioavailable iron and, in some cases, vitamin B12 and folate, which are essential for red blood cell formation. Some small-scale clinical studies and animal research have shown that supplementation with green algae can improve hemoglobin levels in individuals with anemia, especially in populations with limited dietary iron.

For example, a few randomized controlled trials in pregnant women and children have suggested that Chlorella supplementation can modestly increase hemoglobin levels and reduce the risk of anemia. However, the overall number of well-designed human studies is limited, sample sizes are small, and results are sometimes inconsistent. Additionally, the form of iron in algae may not always be as bioavailable as that from animal sources. Therefore, while there is some scientific support for the use of green algae in addressing anemia, the evidence is considered preliminary, and more rigorous research is needed to establish clear efficacy and safety.

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