EnduraBol® High Iodine

EnduraBol® High Iodine provides a sustained release of six trace elements and three vitamins for up to 180 days. The boluses are suitable for breeding cattle at pre-calving and pre-bulling, replacement heifers or cattle with known nutritional deficiencies.

Available to purchase through agricultural merchants and vet practices. Each pack of 20 allows for treatment of 10 cattle in one quick and efficient application, using a specific bolusing gun, which is also available to buy and retail.

icon Active for up to 180 days
icon Suitable for breeding stock and replacement heifers
icon Addresses iodine deficiencies
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Ideal For

  • iconPre-Bulling
  • iconPre-Calving
  • iconHeifer Rearing
  • iconBreeding Stock

A standard two bolus application provides the following quantities per day for up to 6 months:

Trace Elements Daily Supply (avg.)


2.60 mg


2.70 mg


175.10 mg


90.70 mg


19.20 mg


147.00 mg

Vitamins Daily Supply (avg.)


Vitamin E
15.00 iu


Vitamin A
5,996 iu


Vitamin D3
1,199 iu

How to Administer a Bolus

General Guidance

  • Administer to adult cattle weighing over 150kg live weight ONLY.
  • Two EnduraBol® High Iodine boluses should be given to each animal.
  • Before bolusing, the animal should be securely restrained.

Application Instructions

Load Applicator

  • Insert the flat end of the boluses into the chamber first.
  • Ensure both the boluses are securely held in the chamber of the applicator.

Inserting the applicator

  • Place the bolus end of the applicator into the centre of the cow’s mouth, to the back of the tongue.
  • Ensure the cow’s head and neck are extended in a straight line.


  • Severe pressure on the tongue.
  • Using force damaging teeth or any soft tissue.

Bolus Release

  • Gently squeeze the trigger, releasing the boluses over the back of the tongue.
  • Once the boluses have been ejected, further progress will depend on the swallowing reflex of the animal, the animal should easily be able to swallow the boluses.
  • Avoid using force which can cause damage to soft tissue.
  • Carefully remove the applicator, maintaining its central position in the mouth.

Contra-indications & Warnings

  • Only administer after seeking advice from your veterinarian or nutritional consultant regarding the trace elements status of your herd.
  • There is no need to administer additional copper, cobalt or selenium during the active life of EnduraBol® High Iodine (180 days).
  • DO NOT administer to animals weighing less that 150kg.
  • No meat and milk withdrawal period.
  • Do not drop onto hard surfaces.
  • Keep out of reach of children.
  • Do not administer to cattle with non-functional rumens, e.g. calves.
  • If applicable, simultaneous supplementation of additives with maximum content from other sources to those incorporated in a bolus should be avoided.

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