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Figuring out Magnesium Oxide 58% dosing
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Heather Leonard
I had bought some Magnesium Oxide 58% from Uckele last November. I am trying to figure out the right amount to give per feeding. Both of my horses are about 1000 lbs - my smaller mare is closer to 950lbs and my bigger mare is closer to 1100lbs. The label says to give one scoop per day - 1 scoop is 4g = 2320mg of magnesium. If 4g = 2320mg then 1g = 580mg. So if I give 5g a day, then I would be giving 2900mg of magnesium.
Am I correct in thinking that I should be giving 3g (3000mg) a day? Should I give 5g once a day or 2.5g twice a day? Is my math correct? Is there any more accurate way to give it? Thanks! Heather Mass 2000 |
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Hi Heather,
You're almost there. 1 gram of 58% MgO does = 580 mg of elemental magnesium. The trick is not to confuse product weight (measured in grams) with the elemental mineral amount that you dose (unfortunately, also measured in grams with major minerals like magnesium). See if this helps. Food grade minerals aren't 100% minerals - they're always bound to something. The percentage reflects the other "stuff." The product you have (magnesium oxide) is 58% elemental magnesium. That means that 1 gram weight of product will contain 0.58 grams of magnesium; or 580 milligrams. If you want to give 5 grams of elemental magnesium a day (that's the dose you're advised to give?) then you would need 8.6 grams (weight) of magesium oxide 58% (product). 5 grams (dose) divided by 0.58 (percentage) = 8.6 grams. This simple conversion works for gram to gram calculations. Kathleen (KFG in KCMO) Missouri, USA Dec 2005 |
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Heather Leonard
Hi Kathleen, Thank you so much for breaking down how to calculate the amount of magnesium oxide is in a gram. So helpful! Sorry for my last email being misleading with regards to the amount I am trying to feed. I am starting my horses on the emergency diet until I can get my hay tested and get a customized mineral plan. The emergency diet calls for 1.5g per 500lb. My horses are around 1000lb each (950lb and 1100lb). So they should be getting 3g (3000mg) per day, right? If the product I have has 0.58g or 580mg per gram, I would give 5 grams which would be 2900mg or 2.9g, correct? If my calculations are correct, should I give it once a day or split the dose into two feedings? Sorry for all the questions, just want to get this right. Thanks! Heather Mass 2000 Food grade minerals aren't 100% minerals - they're always bound to something. The percentage reflects the other "stuff." The product you have (magnesium oxide) is 58% elemental magnesium. That means that 1 gram weight of product will contain 0.58 grams of magnesium; or 580 milligrams. Kathleen (KFG in KCMO) Missouri, USA Dec 2005 |
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Heather here is a useful file in this regard: Kathleen has also put together a great chart on this subject, but I can't find it right now,and am out of time. Kathleen? Lorna in Ontario,Canada
https://www.facebook.com/ECIRGroup
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Heather,
If you have to give 3 grams (elemental mineral amount) and your product (MgO) is 58% pure, the 3/0.58 = 5 grams (weight) of product (MgO). Totally up to you if you split it or give it all at once. A lot of that will depend on whether your horses eat it readily. BTW, when dosing minerals, it's always wise to start slow. Start with a half dose and see if they eat it. If NO, then decrease by another half, even if you have to start with just a pinch. Once they accept it, start working your way up to the full dose. You'll find this helpful when you start giving the full compliment of minerals based on your hay analysis. Kathleen (KFG in KCMO) Missouri, USA Dec 2005 |
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Lorna,
Probably one of those things I did and forgot about. Clueless at the moment! I'll look around. Kathleen (KFG in KCMO) Missouri, USA Dec 200 |
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Hi Kathleen and Lorna,
There is a document by Patti Kuvik for Magnesium Oxide 54% in the files. It lists Volume Measure, Weight in Grams, Average weight and Magnesium provided. Might this one be the one you were thinking of? Equine Cushings and Insulin Resistance
Kathy Brinkerhoff SE/WI 10/12 |
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Carol
But if the company says 1 scoop is almost 3 g of magnesium (not magnesium oxide), haven't they already factored in the 58%? Carol and Rossi in Maryland 2003 |
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>Probably one of those things I did and forgot about. Clueless at the moment! I'll look around. It's one of my faves,Kathlee. I'll look again,too.I know it's there but it's somewhere my mind doesn't automatically go.I've done this before.(I hear practice makes perfect.  )Lorna in Ontario,Canada
https://www.facebook.com/ECIRGroup
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The one I mean is a chart.
Let's you see the conversions,the dosages you need according to your hay analysis,etc. I posted the link to Patti's earlier today,but this one always gets away from me. Lorna in Ontario,Canada
https://www.facebook.com/ECIRGroup
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Carol asked, "But if the company says 1 scoop is almost 3 g of magnesium (not magnesium oxide), haven't they already factored in the 58%?"
Yes, you would think so, but after reading so many wonky feed and supplement labels, I don't trust anyone. Once way to know for sure is to weigh the amount of product in one scoop. If 1 scoop of MgO contains 3 grams of elemental magnesium, then the contents would weigh 5.2 grams. Kathleen (KFG in KCMO) Missouri, USA - Dec 2005 |
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---In EquineCushings@..., <carolofearth@...> wrote : But if the company says 1 scoop is almost 3 g of magnesium (not magnesium oxide), haven't they already factored in the 58%? = = = = = = = = = In this case, yes. The label says a scoop weighs 4 grams and contains 2320 mg of mag. Eleanor in PA
EC Co-owner Feb 2001 |
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Now I'll sign........sigh. FOUND IT!! It's for calculating bulk minerals,but it has the percentages included. file:///C:/Users/Cane/Downloads/ECList_ProdCalc_v1%20(3).pdf I love this chart,Kat! Thanks for doing it. Lorna in Ontario,Canada
https://www.facebook.com/ECIRGroup
>Probably one of those things I did and forgot about. Clueless at the moment! I'll look around. |
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Carol
Thanks, Kathleen, hadn't thought of the weight difference. Good idea! Carol and Rossi in Maryland 2003 |
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