Magnesium Oxide

A high-quality form of Magnesium Oxide known to contain less Iron than other imported forms. Mined and produced right here in Australia, it is scientifically proven to be a safe and effective form of magnesium supplementation in the horse.

Magnesium Oxide contains approximately 57% Magnesium and a standard dose is between 10-20g daily for the average-sized horse.

This packet contains 2.8kg 

This product is a nutritional supplement only as is designed for inclusion in horse feed, this product has no therapeutic effect.

Why does the powder vary in colour? Read Here.

*Subscriptions:Receive 5% off when you subscribe to ongoing orders. You can edit your subscription order, including products and delivery dates, or cancel your order at any time, without penalty. No other discount, loyalty points reimbursement or checkout code is valid with Subscriptions. Local pick-up is still possible using the code LOCALPICKUP at checkout.


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Customer Reviews
4.8 Based on 25 Reviews
5 ★
92% 
23
4 ★
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4% 
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Filter Reviews:
Missy's Bucket Magnesium Oxide Review
07/01/2025

Only appreciated the difference when I ran out!

On two occasions, I have run out of Mag Oxcide and noticed uncharacteristic spooky and high energy behaviours. Once the supplement is started again, behaviours are much more consistent and reliable.

VW
Vanessa W.
Australia
Missy's Bucket Magnesium Oxide Review
29/10/2021
I recommend this product

Magnesium Oxide

I've been using this product for some time now. I love that it's low Iron and I upped the recommended dose a little recently due to lush Spring growth which helped to keep my QH mare calm. I also use it with my two minis, one which is very prone to laminitis. Used in combination with the Missy's Bucket original powder, I know my horses are getting their essential vitamins and minerals to ensure optimum health.

A
Anonymous
Australia
19/03/2025

Missy’s Bucket Magnesium Oxide

Horses were very happy to accept magnesium oxide added in hard feed. Happy healthy horses.

SH
Sharon H.
Australia
26/10/2024
I recommend this product

Wonderful stuff

It’s very easy to use and I swear by it

JR
Jaime R.
Australia
14/07/2024
I recommend this product

Magnesium Oxide

Notable improvement in hoof health in all of my 3 horses - 29,10 & 3y/o plus an “attitude “ improvement in the 2 ridden horses. Can’t recommend your product highly enough,the value & service are great- thank you

GM
Gloria M.
Australia
24/05/2024

Unfortunately my horse refuses to eat his feed with it in it. 😫 Do you have any suggestions ?

DL
Deb L.
Australia
30/03/2024
I recommend this product

Great Product without the Fancy Price

Great product without the fancy price tag

JS
Jennah S.
Australia
20/03/2024

Excellent product and arrived very quickly. Will buy again.

L
Leanne SVG verified by SHOP
Australia
28/02/2024
I recommend this product

Quality Product without the Price tag

Fantastic product without the big price tag a definite staple in our feed room.

JS
Jennah S.
Australia
26/11/2023

Great product and price. It arrived very quickly. Will order again.

L
Leanne SVG verified by SHOP
United States
17/10/2023
I recommend this product

Magnesium Sulphate

Seems to have made a big difference to the irritability of my horses over spring, less reaction to situations

PE
Philip E.
Australia
10/05/2023
I recommend this product

Great product - will be buying more

Excellent product - horses are doing great and don’t notice it in their feed despite it having a bit of a smell and mine can be fussy! Will definitely be ordering more when the time comes. Online ordering was simple and delivery prompt. Do recommend! Thank you!

A
Anonymous
Australia
10/05/2023
I recommend this product

Great product - will be buying more

Excellent product - horses are doing great and don’t notice it in their feed despite it having a bit of a smell and mine can be fussy! Will definitely be ordering more when the time comes. Online ordering was simple and delivery prompt. Do recommend! Thank you!

A
Anonymous
Australia
04/09/2022
I recommend this product

Magnesium oxide

Perfect fixed my horses problem horse is calm

SM
Sonia M.
Australia
13/08/2022
I recommend this product

Great Product

Very happy with the Mag Oxide from Missy Buckets. Benefits are immediately noticeable with the horses able to recover a lot quicker in their muscles after a heavy working session prior. Very important as we return to competition season and needing to back up multiple events at peak performance. Will buy again - thank you

A
Anonymous
Australia
22/04/2022
I recommend this product

Missy's bucket are great value and great service

BB
Brooke B.
Australia
01/04/2022
I recommend this product

Great product very fast shipping

Definitely where I’ll be purchasing my magnesium from now on

RL
Rosie L.
Australia
21/03/2022
I recommend this product

Best Magnesium product

It works far better then the expensive mag products and I use less.

YM
Yvette M.
Australia
06/02/2022
I recommend this product

Excellent Product

I am very happy with it I have recommended to my friends.

LS
Lisa S.
Australia
02/12/2021
I recommend this product

not the same

the magnesium oxide is a complete different colour, i wish i had been told before purchasing, i was really worried about feeding it

A
Anonymous
Australia