Selenium
Selenium is an essential trace mineral incorporated into selenoproteins including glutathione peroxidase & thioiodothyronine deiodinases; the thyroid contains the highest selenium concentration per gram of any tissue, & supplementation reduces thyroid antibodies & supports hormone synthesis in deficient individuals.
Evidence last reviewed: 04 Apr 2026
Moderate evidence suggests selenium supplementation can significantly reduce thyroid antibodies in individuals with Hashimoto's thyroiditis. While the thyroid's high selenium concentration highlights its importance, more research is needed to fully understand its broader effects on thyroid function and immune parameters.
Thyroid function, selenium biochemistry, & immune parametersGeneral population and patients with thyroid disorders · reviewModerate
A comprehensive review confirmed that the thyroid gland contains the highest selenium concentration per gram of any organ; selenium is indispensable for the synthesis of thyroid hormones (as deiodinase cofactor), & deficiency impairs T4-to-T3 conversion; supplementation in autoimmune thyroiditis reduces antibody titers & may improve quality of life.
Thyroid antibodies (TPOAb) & thyroid function in Hashimoto thyroiditisAdults with Hashimoto autoimmune thyroiditis · systematic review and meta-analysis of RCTsModerate
Meta-analysis of 35 RCTs (n=2,358) found selenium supplementation significantly decreased TPOAb levels in patients not on thyroid hormone replacement, lowered TSH, & reduced malondialdehyde; adverse effects were comparable to placebo (moderate certainty of evidence).
Men's Sperm Quality & Testosterone Stack
Male factor infertility accounts for ~50% of cases & is largely driven by oxidative stress, micronutrient deficiency, & suboptimal testosterone. Ashwagandha has RCT evidence for significantly improving sperm concentration, motility, & testosterone. L-carnitine is the most evidence-backed intervention for sperm motility. CoQ10 & selenium reduce seminal oxidative damage, while zinc is essential for spermatogenesis & androgen synthesis.
Thyroid & Hormonal Support
Iodine & selenium are combined to support thyroid function & hormonal balance. Iodine is essential for thyroid hormone production, while selenium supports thyroid health & antioxidant defense.
Men's Fertility, Power & Recovery Stack
This personalized supplement stack is optimized for enhancing your baseline health, supporting recovery, and boosting strength during your active training phase. With Vitamin D3 for immune support, electrolytes for hydration, fish oil for overall wellness, creatine for power, and tart cherry for recovery, this budget-friendly combination will help you maintain peak performance and promote effective recovery.
Forms & usage▾
Take 100-200 mcg daily with food for optimal absorption.