Synopsis

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

Brewer's yeast has traditionally been used as a nutritional supplement to support general health, including for individuals with anemia. Its use for anemia is primarily based on its rich content of B vitamins (especially folic acid and vitamin B12), iron, and protein — all nutrients that play roles in red blood cell production. Historically, brewer's yeast has been recommended in folk and alternative medicine systems to boost energy and combat symptoms associated with low iron or vitamin B deficiency, both of which can contribute to anemia.

However, the actual content of vitamin B12 and iron in brewer's yeast may vary significantly depending on the manufacturing process, and not all preparations contain meaningful amounts of these nutrients. While brewer's yeast is a good source of folate, it is generally not a reliable source of vitamin B12, which is critical for preventing certain types of anemia (e.g., pernicious anemia). Scientific studies directly examining brewer's yeast as a treatment for anemia are limited, and clinical evidence supporting its efficacy is weak. Most guidance for its use for anemia comes from tradition and the theoretical benefits of its nutrient content, rather than from robust clinical trials demonstrating a direct effect.

In summary, while there is some rationale based on nutrient composition, the use of brewer's yeast for anemia is primarily traditional, and the evidence supporting its effectiveness is limited.

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