Hermetica Superfood Encyclopedia
The Short Answer
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.
CategoryVitamin & Mineral
GroupSelenium
Evidence LevelStrong
Primary Keywordselenium glycinate benefits
Synergy Pairings5
Selenium Glycinate — botanical close-up
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.
Origin & History
Natural habitat
Selenium Glycinate is an amino acid chelate form of selenium, combining selenium with glycine. This form is designed for enhanced absorption and bioavailability.
“Amino acid chelates like selenium glycinate represent a modern advancement in supplement technology, improving nutrient delivery and efficacy.”Traditional Medicine
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.
Preparation & Dosage
Traditional preparation
Standard dosage is 55 mcg of selenium daily. Consult a healthcare provider before use.
Nutritional Profile
- Selenium: 55 mcg per day recommended for adults. - Amino acid chelate form for enhanced absorption. - Essential trace mineral with multiple health roles.
How It Works
Mechanism of Action
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.
Clinical Evidence
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.
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.
Synergy Stack
Hermetica Formulation Heuristic
Frequently Asked Questions
How much selenium glycinate should I take daily?
The recommended dosage ranges from 55-200 mcg daily for adults, with 200 mcg being the upper safe limit for long-term supplementation. Higher doses should only be used under medical supervision to avoid selenium toxicity.
Is selenium glycinate better absorbed than other selenium forms?
Yes, selenium glycinate demonstrates 20-30% higher bioavailability compared to sodium selenite or selenomethionine. The glycine chelation allows absorption through amino acid transporters, avoiding competition with other minerals in the digestive tract.
Can selenium glycinate help with thyroid problems?
Selenium glycinate supports thyroid function by activating deiodinase enzymes that convert T4 to active T3 hormone. Studies show 200 mcg daily can reduce thyroid antibodies in Hashimoto's thyroiditis and improve overall thyroid hormone metabolism.
What are the signs of selenium glycinate overdose?
Selenium toxicity symptoms include garlic breath odor, metallic taste, hair loss, brittle nails, fatigue, and neurological symptoms. Chronic intake above 900 mcg daily increases risk of selenosis and should be avoided.
Should I take selenium glycinate with food or empty stomach?
Selenium glycinate can be taken with or without food, as the glycine chelation protects it from dietary interference. However, taking it with a small amount of food may reduce potential stomach upset in sensitive individuals.
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