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The products on this website are not available in their current form in the USA. A selection of TWYDIL® products appearing on this website have been exclusively and specifically produced to meet FDA guidelines and are being currently distributed in the USA. Please contact our exclusive US distributor for further information on available products:
+1 646 812 50 62.

Vitamin D

Vitamin D and its roles in horses supplied with adequate daily amounts:

  • Regulator of calcium absorption
  • Regulator for blood levels of calcium and phosphorus
  • Regulator of bone calcium deposition
  • Regulator of kidney reabsorption of calcium and phosphorus
  • Supports immunity and antiviral defenses

Did you know that active vitamin D is produced in skin during exposure to UV light such as the rays of the sun ?

A horse on total indoor management needs regular vitamin D supplementation.

Vitamin D is particularly unstable when exposed to light, which is the main limiting factor regarding this vitamin.

Depending on the physiological status of the horse and its management, the needs vary from 1000 to 8000 IU of vitamin D per day.

An adequate calcium-phosphorus ratio must be supplied in the feed in order to guarantee the good efficacy of this vitamin.
TWYDIL® products that contain this ingredient:



Christmas Holidays

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.