Selenium is broadly praised for thyroid, energy, and hair benefits, with some caution around dosing and antioxidant overuse.
Source Naturals Selenium (Yeast Free) delivers selenium in a form suitable for those avoiding yeast-derived ingredients, supporting antioxidant enzyme activity, thyroid hormone metabolism, and immune function. Selenium is an essential trace mineral, and this formulation is designed for individuals who need a reliable, clean-label option without yeast-based compounds.
Why It's Worth Considering: The yeast-free designation makes this a practical choice for those with yeast sensitivities or candida concerns who still want consistent selenium intake at a meaningful daily dose.
For maintenance: 100-200mcg daily (selenomethionine form preferred). For thyroid support: 200mcg. The RDA is 55mcg but most functional medicine practitioners recommend 100-200mcg. Do NOT exceed 400mcg/day — selenium has a narrow therapeutic window and excess causes selenosis (hair loss, nail brittleness, GI issues).
Yes — selenium is critical for thyroid function. It's required for the enzyme that converts inactive T4 to active T3, AND it protects thyroid cells from oxidative damage. In Hashimoto's, 200mcg selenium daily reduces TPO antibodies by 20-40% in clinical trials. It's one of the most evidence-based supplements for thyroid health.
One Brazil nut contains 70-90mcg selenium — so 2 nuts/day provides a therapeutic dose. However, selenium content varies dramatically by soil (some nuts have 10mcg, others have 300mcg). If you rely on Brazil nuts, be cautious about overconsumption — 4-5 large nuts could exceed 400mcg. A supplement provides a consistent, known dose.
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No significant interactions identified. Always consult your healthcare provider.
† These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
