Selenium Glycinate

Selenium glycinate is a chelated form of selenium bound to the amino acid glycine, offering superior bioavailability compared to inorganic selenium forms. It functions as a cofactor for glutathione peroxidase enzymes, providing potent antioxidant protection and supporting thyroid hormone synthesis.

Origin & History

Selenium Glycinate is an amino acid chelate form of selenium, combining selenium with glycine. This form is designed for enhanced absorption and bioavailability.

Historical & Cultural Context

Amino acid chelates like selenium glycinate represent a modern advancement in supplement technology, improving nutrient delivery and efficacy.

Health Benefits

- Enhances antioxidant defense by neutralizing free radicals, protecting cells from oxidative damage and supporting longevity. - Supports thyroid function by aiding in hormone synthesis, crucial for energy metabolism and overall vitality. - Promotes immune health by boosting the production of white blood cells, essential for fighting infections. - Contributes to heart health by reducing inflammation and oxidative stress, potentially lowering the risk of cardiovascular diseases. - May improve cognitive function by protecting brain cells from oxidative stress, supporting mental clarity and focus. - Supports reproductive health by enhancing sperm quality and motility, which can improve fertility. - Aids in detoxification by supporting liver function, helping to cleanse the body of harmful substances.

How It Works

Selenium glycinate serves as a cofactor for selenoproteins, particularly glutathione peroxidase (GPx) and thioredoxin reductase enzymes, which neutralize hydrogen peroxide and lipid peroxides. The chelation with glycine enhances intestinal absorption through amino acid transporters rather than competing mineral pathways. It also supports iodothyronine deiodinases that convert T4 to the active thyroid hormone T3.

Scientific Research

Research supports the enhanced absorption of amino acid chelate forms like selenium glycinate. Studies highlight its role in antioxidant defense and thyroid support.

Clinical Summary

Human studies show selenium supplementation at 200 mcg daily significantly increases plasma selenium levels and glutathione peroxidase activity within 6-12 weeks. A randomized controlled trial of 184 adults found selenium supplementation improved thyroid function markers and reduced thyroid peroxidase antibodies in those with autoimmune thyroiditis. Meta-analyses indicate selenium intake correlates with reduced cancer risk, though intervention studies show mixed results depending on baseline selenium status.

Nutritional Profile

- Selenium: 55 mcg per day recommended for adults. - Amino acid chelate form for enhanced absorption. - Essential trace mineral with multiple health roles.

Preparation & Dosage

Standard dosage is 55 mcg of selenium daily. Consult a healthcare provider before use.

Synergy & Pairings

Magnesium, Omega-3, Vitamin C

Safety & Interactions

Selenium glycinate is generally well-tolerated at doses up to 400 mcg daily, but chronic intake above 900 mcg can cause selenosis with symptoms including hair loss, nail brittleness, and neurological issues. It may interact with anticoagulant medications by enhancing their effects and can reduce absorption of vitamin C when taken simultaneously. Pregnant women should limit intake to 400 mcg daily, as excessive selenium may increase risk of gestational diabetes.