Vitamins and Minerals
Care
must be taken with vitamins and minerals, though we do not usually
consider them to be hazardous. Excesses of many minerals can
cause imbalances in the diet, affecting absorption rates. Selenium
is one of the most commonly supplemented minerals. Though necessary
for healthy muscle function, working to protect cells against
damage caused by free radicals (produced by a natural process),
there is a small range between what is needed and what is excessive.
Most horses need only about 0.1 milligrams per kilogram of dry
matter in their total diet, and NRC (National Research Council)
suggests that 2.0 mg/kg of dry matter can be toxic. Signs of
toxicity range from hair loss to hoof-wall defects, and in extreme
cases damage to the lungs and liver, and even death. Selenium
is found in the soil and is taken up by plant material. There
are regional variations across North America and most feed manufacturers
prepare their feeds accordingly. If you are shipping to a different
location, and plan to use local feed, check with a nutritional
consultant or veterinarian before continuing with your usual
supplementation program.
Vitamins that should be used with caution are the fat-soluble
ones - A,D,E, and K. These are stored by the body if not needed
immediately and toxic levels can build up. The water-soluble
vitamins, B and C, are safer, as excesses are excreted through
the urine. Always feed a balanced ration and use supplements
wisely. Your feed dealer or the manufacturer of a given product
should be able to provide you with advice.
GAGs?|MSM?|Herbals?|Vitamins and Minerals?|Electrolytes?|
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