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Selenium - non-metallic trace element occuring in soil
Selenium - non-metallic trace element.
Selenium is a non-metallic trace element discovered in 1817 by Jöns Jakob Berzelius and it was named after Greek Goddess of the Moon.
It has the symbol of Se, atomic number of 38 and atomic mass of 78.96 gmol ,close to that of Sulphur.
Selenium occurs in the soil in varying concentrations and is most commonly extracted as selenide in a by-product in the processing of Copper, Silver and Lead sulfides. Elemental Selenium and Selenides have relatively low toxicities because of their low biovalability, but in contrast Selenate and Selenite are very toxic and have modes of action similar to Arsenic.
Selenium’s bioavailability is from the uptake of inorganic selenium and its conversion to organic selenium by plants.
These Selenoproteins are mainly Selenomethionine (selmet), Selenocysteine (SeCys) which are the same as that organic Selenium found in Selenium enriched yeast as in SELENOX.
Research has shown that low levels of Selenium in the body could be a risk factor for:
Alzheimers disease, Arteriosclerosis, Arthritis, Angina,Asthma,Acne, AIDS, Body Growth, Bird ‘Flu, Birth defects, Cirrhosis, Cataracts, Cystic Fibrosis, Cold sores, certain Cancers (eg. Throat,Prostate, Liver, Colon, Rectum, Lung, Breast, Ovaries, Cervix, Bladder, Oesophagus, Pancreas.) DNA synthesis, Depression, Dementia, Emphysema, Eye function, Ebola, Eczema,Encephalitis, Heart disease, Hepatitis, High Blood Pressure, Herpes, Human Immune Virus, Kidney damage, Lupus, Leukaemia, Muscle function, Metabolic disorders, Miscarriage, Muscular Dystrophy, Macular degeneration,Male Infertility, Osteoarthritis, Parkinson’s Disease, Psoriasis, Preeclampsia, Premature delivery, Retroviral diseases, Rheumatoid Arthritis, Stroke, Shingles, Sudden Infant Death Syndrome,TB, Thyroid activity and many Viral diseases.