selenium levels - The Horse Forum
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post #1 of 3 Old 10-25-2012, 09:49 PM Thread Starter
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selenium levels

if a horse is receiving 4 lbs of grain at .60 ppm of selenium this would be 1.36 grams of selenium. the say some adds a multi vita/min containing 20 mg of selenium per pound which is 1.25 mg for one ounce and 2.5 mg for the recommended 2 ounce dose. this would mean a total of 3.86 mg of selenium from concentrate and supplement alone. i have read that 1-3 mg for an average 1000lb horse at maintenance. is this correct?
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post #2 of 3 Old 10-25-2012, 10:18 PM
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4# at .6 ppm will yield 1.1 mg Se.
(4 divided by 2.2= 1.8 Kg 1.8 X .6 ppm= 1.09 mg Se)
Are you reading the mineral blend correctly at 20 mg/#? (not 20 ppm?)

Is there a reason why you need to feed the entire 2 oz recommended portion? That amount probably doesn't take into consideration that you are also providing some type of fortified concentrate that is going to provide a certain amount of vitamins and minerals.

The short answer is yes, the recommended amount of Se is 1-3 mg but it's a little more complex than that as it's a % (ppm really) of the entire diet included the hay. You are well within the safe zone even at 4 mg.
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post #3 of 3 Old 10-25-2012, 11:15 PM Thread Starter
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thank you!!! lol actually it says 20mg per pound and 42ppm. i am doing a lot of research with nutrition and the vita/min supplements. i bought a multi vit today and was using a scenario to test myself. i am wanting ti go an all forage diet but i am trying to make sure that i am calculating this properly. i converted my pounds into kgs differently than you. but yours is much easier
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