Selenium (L-Methionine)

What is it?

Selenium is an essential trace element that is not produced by the body; its oral intake is required to obtain this important mineral, of which adequate levels are critical to initiate the immune response against viruses, bacteria, and other pathogens. 
It is an element that reinforces the function of vitamin E and C as defense vitamins; together with iodine, selenium produces thyroid hormones that increase sperm production and maintain the function of the nervous system. 
Without selenium, the liver and pancreas would not be able to carry out their digestive and blood sugar functions; one important function is to act as a cofactor of the enzyme Glutathione peroxidase, which catalyzes the Reduced Glutathione oxidation reaction, resulting in the most important intracellular antioxidant effect for the human body.


  • Promotes  cellular energy production by reducing oxidative stress and providing good oxygen levels throughout the body.
  • It helps to synthesize Selenoproteins, enzymes that participate in many physiological functions, including brain function.
  • Regenerates and lengthens the action of other antioxidants such as vitamin C and E, necessary for the health of brittle hair, skin, and nails.
  • Protect the body from the toxic effects of heavy metals and other harmful substances that cause neuronal diseases.
  • It helps produce antioxidant protein enzymes, which are involved in preventing cell damage and certain types of cancer.
  • Reduces thyroid disorders by providing this gland with the trace elements necessary to produce the T3 hormone.
  • It supports mineral deficiencies that lead to problems with focus, memory, and mental clarity.
  • Assists in the symptomatic reactions of low mood, anxiety states, fatigue, and muscle weakness.
  • Helps reduce episodes of flu and colds during the fall and winter seasons.


Nogales F, Ojeda ML, Fenutría M, Murillo ML, Carreras O. Role of selenium and glutathione peroxidase on development, growth, and oxidative balance in rat offspring. Reproduction. 2013 Oct 29; 146 (6): 659-67. doi: 10.1530 / REP-13-0267. PMID: 24080144.