L-Selenomethionine

L-Selenomethionine is a selenium-containing amino acid, serving as a highly bioavailable form of selenium. Naturally present in foods like Brazil nuts, grains, and some meats, it’s industrially produced through microbial fermentation. Selenium, an essential trace element, plays critical roles in various biological processes, and L-Selenomethionine’s structure allows for efficient absorption and utilization by the body.

Product Name L-Selenomethionine
Appearance White Fine Powder
Specification 0.05% 0.1% 0.5%
Test Method HPLC
CAS No 3211-76-5
MF C5H11NO2Se
Certificate KOSHER/HALAL/ISO/CGMP/USDAORGANIC

Description

Functions​

Antioxidant Activity: As a source of selenium, L-Selenomethionine supports the function of glutathione peroxidase, a key antioxidant enzyme. This enzyme helps neutralize free radicals, unstable molecules that can cause oxidative damage to cells. By reducing oxidative stress, L-Selenomethionine protects cells from damage, potentially lowering the risk of chronic diseases such as cancer, heart disease, and neurodegenerative disorders. Studies have shown that adequate selenium intake, often through L-Selenomethionine supplements, is associated with decreased DNA damage and reduced lipid peroxidation.​

Thyroid Function: Selenium is essential for thyroid hormone metabolism. L-Selenomethionine helps maintain normal thyroid function by supporting the synthesis, conversion, and regulation of thyroid hormones. It plays a role in converting the inactive thyroid hormone T4 to the active form T3. In individuals with hypothyroidism, selenium supplementation in the form of L-Selenomethionine may improve thyroid function and reduce symptoms like fatigue, weight gain, and cold intolerance.​

Immune Support: L-Selenomethionine strengthens the immune system. Selenium is involved in the activation and function of immune cells, such as lymphocytes and macrophages. It helps these cells produce cytokines, signaling molecules that regulate the immune response. Research indicates that selenium deficiency can impair immune function, making individuals more susceptible to infections. By ensuring adequate selenium intake through L-Selenomethionine, the body’s ability to fight off viruses, bacteria, and other pathogens is enhanced.​

Applications​

Dietary Supplements: L-Selenomethionine is widely used in dietary supplements, especially in regions with low soil selenium levels where dietary intake may be insufficient. These supplements are targeted at individuals at risk of selenium deficiency, including vegetarians, the elderly, and those with certain gastrointestinal disorders that affect nutrient absorption. They often come in capsule or tablet form, and some are combined with other nutrients like vitamin E for enhanced antioxidant effects.​

Animal Feed: In the agriculture industry, L-Selenomethionine is added to poultry and livestock feed for selenium fortification. Selenium is essential for animal health, improving growth, reproduction, and immune function. For example, in poultry farming, selenium-enriched feed can enhance egg quality, increase hatchability, and reduce the incidence of diseases in chicks. It also benefits livestock, ensuring healthy muscle development and reducing the risk of nutritional deficiencies.​

Cosmetics: The antioxidant properties of L-Selenomethionine make it a valuable ingredient in cosmetics. It’s used in skincare products like serums, creams, and sunscreens to protect the skin from oxidative damage caused by UV radiation, pollution, and other environmental stressors. By neutralizing free radicals, L-Selenomethionine helps prevent premature aging, reduces the appearance of fine lines and wrinkles, and maintains skin health and radiance.