L-selenomethionine

L-Selenomethionine (CAS 3211-76-5) is the bioavailable, organically bound form of selenium used across nutritional, pharmaceutical, and cosmetic applications. As Seleno-L-methionine, it is the preferred selenium source in dietary supplements.

It is widely used in functional food fortification due to its superior absorption compared to inorganic selenium salts. In dietary supplements and nutraceuticals, it serves as the primary active ingredient in selenium fortification products.

The compound is essential for targeting antioxidant support formulations. Pharmaceutical manufacturers use it as the selenium source in micronutrient preparations, including tablets, capsules, and infusion solutions where precise dosing is critical.

In cosmetic and personal care formulations, it functions as an antioxidant and moisturizing agent in anti-aging creams and serums. Biotechnology and cell culture applications rely on it as a selenium supplement in growth media.

It is particularly useful where organic selenium is required for protein expression studies. L-Selenomethionine is supplied as a white to off-white crystalline powder available in food-grade and pharmaceutical-grade specifications.

The USP and Ph.Eur. grades are commonly sourced for regulated applications. Bulk quantities are offered for industrial formulators, with smaller research quantities available for biotechnology and laboratory use.