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Selenium, like vitamin E, has a central role in the animal’s immune system and serves as a major nutrient involved in the antioxidant system. There are over 25 different enzymes and proteins in the body that require selenium, the most well-known being glutathione peroxidise (GSH-Px seen on blood profile reports)
Selenium reserves in cattle are often at their lowest around calving and selenium inadequacy has been linked to diseases, such as retained placenta, metritis, increased mastitis cases, iodine deficiency and poor reproductive performance.
Inorganic selenium is usually fed as sodium selenite or selenate. This is altered by rumen bacteria to a form that can’t be absorbed. Sel-Plex is the same form of selenium that is found in plants and animals. The selenium in Sel-Plex is found in amino acids such as seleno-methionine (SeMet) and this is the storage form of the element in the body. In the animal SeMet, is converted to seleno-cysteine (SeCys), a highly active form, rapidly utilised to produce the selenium proteins used in metabolism and immunity.
These are both now considered essential amino acids. Sel-Plex takes advantage of the yeasts’ ability to accumulate selenium as SeMet. Feeding selenium as Sel-Plex provides this crucial trace mineral in the form the body (SeMet) is most able to actively absorb, store and utilise.
Trials using Sel-Plex have usually replaced all the inorganic sodium selenite with Sel-Plex. Sel-Plex is well-known to be more bioavailable than sodium selenite (Juniper et al., 2006) and safer (Juniper et al., 2008). Supplementation with Sel-Plex in dairy cows has shown:
The FiMLAC range was started back In 2001 on the back of the DEFRA LINK study, Feed into Milk for Lactating cows.
Massey Feeds carry out in-house analyses of forage and feed samples using NIRS (Near Infra-Red Reflectance Spectroscopy)
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