Pre-Calver + Protected iodEX

Pre-calver + protected iodex is a pre-calver mineral for cows with protected iodEX included. IodEX is a unique bioavailable, multi-stage system which protects iodine from being wasted inside the animals body. This pre-calver will provide cows with vitamins, minerals and protected iodEX which help support colostrum quality, calving ease, prevent mineral deficiencies and help ensure birth of health calves.

Pre-calver + protected iodEX is a 25kg bag and is available in a full pallet of 42 bags.

Role of Iodine

Iodine is an essential trace element for animals and is vital for growth, development, foetal development & reproduction. Iodine is found throughout the animal body in all tissues and in all body fluids.
The main role of iodine is as a component of the thyroid hormones which regulate basic body metabolism, including the absorption of dietary nutrients and the maintenance of body temperature. Ruminants also require iodine as an essential trace element for the microbes found in the rumen.
Iodine is required for milk production and is vitally important to support the growth & development of embryos. In pregnant animals, iodine passes freely across the placenta (the organ in the womb that nourishes the embryo) and accumulates in the blood & tissues of the growing foetus.

Iodine Deficiency

Most Iodine deficiencies we see are simple i.e. low intakes of iodine from forage. A significant percentage of Irish farms grow grass and silage which are low in iodine. Without continuous daily supplementation these animals will not have adequate iodine in their diet.

Induced deficiencies can occur when there are anti-nutritive factors in the feed. Goitrogens, factors in lush grass and high dietary calcium are examples. Goitrogenic feeds include brassicas – rape, kale, swedes and turnips.

A further difficulty with iodine is that it is described as a ‘medium’ store element. Animals can only store iodine for a short period of time. This is why even following months of supplementation with iodine indoors, un-supplemented dairy cows at grass in the spring (ie. cows receiving no meals or minerals), may have low iodine status entering the breeding season.

Over the past years there has been a significant reduction in iodine levels in dairy feeds to get milk powders compliant with consumer requirements for manufacture of infant formula. There are feeding situations where dairy cows are getting low levels of iodine – example where low levels of concentrate are fed.

Bioavailability of Iodine


Iodine is not physically a very stable element and up to 50% of feed iodine may sublime (goes from a solid to gas without passing through a liquid phase). Only iodine that is kept dry and cool and properly ‘protected’ when in contact with other minerals, will remain both physically & nutritionally available to the animal. Problems can also occur when Iodine is mixed in TMR or minerals spread on silage.


1)As a protected source to combat feed interactions, but still be available in the rumen, where 60% of iodine absorption occurs

2)As a protected form to bypass the rumen to be released later in the digestive tract

3)As a quickly available soluble source.


See also:

Sweetlics Pre-Calver, Headstart Pre-Calver & Rumbuff + Yeast.

Additional information

Weight N/A
Choose size

25kg bag full pallet (42 bags)


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