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Equistro Megabase For Horses

Equistro Megabase For Horses
3kg Tub

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  • 3kg Tub £38.99


A complete complementary vitamin, mineral and trace element supply for breeding and sport horses. Can be fed on its own or combined with other Equistro products.

Calcium and phosphorus

99% of calcium and phosphorus is stored in the skeleton of the horse, which shows the importance of the two elements for the stability and function of the bony structure. A 500 kg horse requires, depending on the expected performance, 25-50 g Ca and 12-40 g P / day. The requirements are highest with mares in late pregnancy and foals in the first year. The normal Ca/P ratio should not drop below 1:1 and not exceed 3:1. In EQUISTRO MEGA BASE the Ca/P ratio is 5:1 to compensate for normal feed.

Sodium and chlorine

Sodium and chlorine maintain the osmotic pressure of extracellular liquids and regulate the acid/base balance and water balance. A 500 kg horse requires 10g Na and 40g Cl, but the requirement may be six times as high depending on the workload. In such cases, additional high-volume supplementation in other feeds is indispensable.


Magnesium is required for the activation of many enzymes - including those involved in muscle metabolism - and it influences the protein, fat and carbohydrate metabolism. Adult horses require between 10 and 13g Mg/animal/day, foals between 5 and 10g. Since only pasturing will (in most cases) ensure sufficient intake, it is necessary to supplement magnesium in winter. Since the magnesium content in mare's milk drops off rapidly, only 20% of the foal's requirement is ensured from the 3rd month. A connection is suspected between supply deficiencies of magnesium in foals and the occurrence of anomalies in posture and limbs.


Iron is required for the formation of haemoglobin and myoglobin and is therefore important for the supply of oxygen by the erythrocytes - and thus for performance. According to Finckler-Schade et al., 1996, 20% of foals in pasture showed insufficient supplies, and 16% of the operations checked in winter showed insufficient supplies acc. to Hackländer et al., 1996. Iron is depleted by lactation, haemorrhaging and sweating, with approx. 20 mg iron loss per kg of sweat. Feed supplementation with iron may become necessary after severe worm infestation and occasionally for high-performance horses (Ahlswede, 1991).


The content in dry substance should not be under 20 mg/kg and not in excess of 50 mg/kg.


In regions with calcareous soils or light sandy soils, the assumed minimum requirement for horses of 30-40 mg Mg / kg feed dry substance may not be reached.


Horses of all ages require approx. 50 mg zinc / kg feed dry substance. This requirement is usually not met with green fodder and hay. A supplementation of up to a 1 mg of elemental zinc / kg body weight / day is therefore recommended. Horse sweat contains 10 mg zinc / kg.


Methionine is the second most important protein building-block in horses. It is required, e.g. in keratogenesis and influences coat condition and hoof horn strength. Methionine can be converted into the non-essential amino acids cysteine and cystine. Growing foals, pregnant and lactating mares and hard-worked stallions at stud must have particularly good supplies of essential limiting amino acids such as methionine.

Sulphur A horse weighing c. 500 kg probably requires approx. 6 g sulphur / animal / day. Sulphur is a component of amino acids such as methionine, cystine and cysteine, vitamins such as biotin and thiamine and many important body substances such as heparin, insulin, coenzyme A and chondroitin sulphate. The protein keratin contains 4% sulphur. For the most part, horses are able to utilize only the organic sulphur in its feed. So the horses' requirements must be adequately met by "organic sulphur suppliers" such as methionine.

Vitamin A

Vitamin A influences the skin, respiratory, urinary and sexual apparatus, especially in young and in pregnant animals. At least in winter, a supplementation of vitamin A (or beta-carotene as its provitamin) is indispensable.

Vitamin D3

Vitamin D3 supports the absorption of Ca and P from the intestine as well as the reabsorption of Ca from the kidneys. The maintenance requirement is 5-10 IU / kg body weight / day, for brood mares and foals it is 15 IU (Meyer, 1996).

Vitamin E The antioxidant effect of vitamin E is crucial for muscle cells and the maintenance of the muscle tone. The requirements for horses during the growth period, breeding and in competitive sports are much higher than the uptake from feed. The vitamin E requirements increase even further when fat-rich feed is administered to raise the energy intake. Normal winter hay and oat rations provide only 5% (!) of the normal requirement. At least 2,000 mg should be administered per animal and day.

Administration and application

Horse 500 kg Indication Daily ration Time period
General For optimum basic supply of minerals, vitamins, trace elements and amino acids and compensation of natural deficiencies in green fodder (e.g. hay, oats). 30 g Daily
Competition horses Basic supply, performance 30 g Daily
Breeding stallions Basic supply, performance 30 g Daily
Brood mares Basic supply, performance 30 g Daily, see EQUISTRO MEGA BASE junior
Foals / 3-year-olds Basic supply, skeletal
development, sucking foal
15 - 30 g Daily, see EQUISTRO MEGA BASE junior

Need help or advice? Contact us:

  • Landline: 01582 842096
  • Mon - Fri: 8:30am - 5:00pm
  • Sat: 9:00am - 1:00pm (Collections only)
  • Email: [email protected]

All prices include VAT where applicable.

Delivery Information

How quickly do you deliver?

Under almost all products on our website is an Estimated dispatch time, check this for a delivery prediction specific to the item you are looking to purchase. These badges are updated live based on the stock levels we have and also those of our suppliers - so are usually very accurate, but cannot be guaranteed. In more general terms, we aim to dispatch all orders within 1 working day of receiving payment (and a prescription if required). If we cannot do so within 3 working days we will contact you by email.

What do you charge for delivery?

For UK delivery, we charge the following:

Order Total Weight Delivery
£0-£28.99 Under 2kg £2.99
2kg+ £4.99
£29-£38.99 Under 2kg Free
2kg+ £4.99
£39+ Under 2kg Free
2kg+ Free

Prices quoted are for delivery to all parts of mainland UK except certain Scottish postcodes (where the price is higher for items sent by courier. Delivery of food abroad (including Channel Islands, N. Ireland and other islands around the UK) is charged at a higher price and free delivery is not available. Temperature controlled products are also not always subject to the standard and/or free delivery options.

For full information on our delivery charges, including prices on heavy deliveries to Scotland and abroad, see our delivery information page.

We can deliver most items to all around the world, but prices do vary. To find the exact cost of shipping your item, and to see all options available, follow these steps:

  1. Put the items you wish to order in your basket
  2. Proceed to checkout and enter your delivery address, including country
  3. Delivery information including price will automatically update to what is available to you

Delivery of aerosols

Due to restrictions aerosols can't be sent by Royal Mail. We appreciate your understanding.

Delivery of temperature controlled items

Some products, such as non-ambient items and frozen food, need to be delivered in insulated packaging to prevent them from getting too warm (or too cold) during transit from us to you. Purchasing any of these items in your order will result in a £1.99 charge being added to the total to cover the high cost of the insulated packaging materials. You only pay the £1.99 once per order, regardless of how many temperature controlled items you purchase in that order.

How do I cancel or return an order?

Please call us as soon as possible if you need to amend or cancel an order on 01582 842096. If your order has been processed for dispatch we will be unable to cancel or amend the order. You will however be able to return your product for a full refund*.

To return an item, you must contact us by phone or email to arrange this BEFORE posting any product back to us. We will explain the process at this stage for you.

*For full details on returns, see our terms and conditions page.

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