Synopsis

Source of validity: Scientific
Rating (out of 5): 4

Selenium yeast is a form of selenium—a trace mineral essential for human health—produced by fermenting yeast in a selenium-rich medium. The glandular system includes the thyroid, adrenal, and other hormone-producing glands. Scientific evidence supports the use of selenium, including selenium yeast, for the optimal function of the thyroid gland, a key component of the glandular system. Selenium is a vital cofactor for enzymes involved in thyroid hormone metabolism, such as iodothyronine deiodinases, which convert thyroxine (T4) to the more active triiodothyronine (T3).

Numerous studies have shown that selenium supplementation, particularly in selenium-deficient individuals, supports normal thyroid function and may reduce the risk of thyroid-related disorders, such as Hashimoto’s thyroiditis and Graves’ disease. For example, a 2013 review in the journal Thyroid concluded that selenium supplementation can reduce thyroid peroxidase antibodies in patients with autoimmune thyroiditis. Selenium yeast is often preferred over inorganic forms due to its superior bioavailability and safety profile.

While most research focuses on the thyroid, selenium also plays a role in the immune system and helps protect glandular tissues from oxidative stress. However, evidence for selenium yeast specifically supporting other glands (e.g., adrenal or pituitary) is limited. In summary, the use of selenium yeast for glandular system support is scientifically validated, particularly with respect to thyroid health.

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