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Copper (Cu)

Copper and its roles:
  • Bone formation due to its catalytic action on iron fixation
  • Support mitochondrial  function, essential for energy production (ATP)
  • Support haematogenesis
  • Support  keratinisation  
  • Catalyze superoxide dismutase, an antioxidant enzyme involved in performance

Copper is a catalyst for many organic reactions and its functions are important and multiple. It forms part of many metalo-enzyme complexes.

The bioavailability of copper can vary and depends on the type of raw material but also the age of the horse. A diversification of the sources (organic and mineral) is an advantage to increase this bioavailability. 

The needs in copper are estimated at 3.5 mg/kg of metabolic weight per day. The ratio Cu/Zn must be close to 1:4. High zinc diets have been known to induce copper deficiency anaemia.

The metabolic weight corresponds to the horse's weight to the power of 0.75: for example a horse of 450 kg : 450 0.75 = 98 kg of metabolic weight; such a horse will need  343 mg of copper per day.

Copper and zinc

Cu/Zn ratio between 1:4 and 1:3 is very important in order to:
  • regulate nutrient absorption
  • act synergistically in controlling growing processes
  • regulate metabolic stress reactions

Practical case: oats 5 kg and hay 5 kg
kgZn (mg)Cu (mg)Zn / Cu
Ideal value6272093
% ratio/need5719

A traditional feed does not cover the needs in trace elements, especially copper and zinc.
TWYDIL® products that contain this ingredient:



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Our offices are closed from 24 December 2018 to 2 January 2019, 8 am. We thank you for your trust...

Product of the month




The season has begun and with the increase of the workload, the risk of gastric ulcers is maximum.

For your horses in lack of fitness, think of TWYDIL® STOMACARE. This product keeps your athletes in good shape, ensures their gastric well-being and strengthens their stomach defenses.

Studies show that the activity of the product is visible after 2 weeks with a maximum effect occuring after 4 weeks of complementation. TWYDIL® STOMACARE should be given 15 minutes before exercise.