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Brewer's Yeast

A natural supply of B vitamins and amino acids

19 reviews. 5 / 5
Guest - 29/06/2023 14:58
Great product & robust packaging
Trusted Feefo Customer - 01/12/2021 19:14
Quite pricey,  compared to other resellers. So only buy when on special offer.
Trusted Feefo Customer - 28/11/2021 19:18
Good quality product for our horses.
Jacquie - 28/02/2021 11:23
Palatable for the horse!!
Trusted Feefo Customer - 13/08/2020 10:40
I have used this product for a number of years for a mare that had several minor colics and has since had none. Also appears to be effective for my ex racer that more than likely would have suffered ulcers in the past.
robert - 13/08/2020 07:17
great product  that my animal loves
Trusted Feefo Customer - 26/06/2020 12:50
I bought this for my ducklings. It's exactly what I needed to help their growth and to prevent angel wing
Kim - 13/06/2020 20:01
Cheaper than other brewers yeast and this is the one my two gastric prone mares prefer. Helps with symptoms of hind gut problems particularly when spring grass has come through
Sarah - 13/05/2020 21:23
Fantastic product, fantastic service & delivery
Madeline - 18/12/2019 22:52
I've been using Feedmark products for years now and I keep coming back - great quality and value.

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Feeding Guide

Weight of Horse/Pony Amount per day                                
Up to 400kg ½ scoop
Over 400kg 1 scoop
1 level (50ml) scoop of Brewer's Yeast weighs approximately 38g

If you want to supplement your horse's diet with live yeast to aid digestion, feed the friendly bacteria and assist fibre utilisation, look for the EU licensed and scientifically proven Yea-Sacc® in BioPro.

Yea-Sacc® is also included in Original Balancer™ and the all-in-one Performance Range products.

Feed supplements should be fed according to body weight. Introduce to the horse's diet gradually, splitting between feeds (when applicable).

Brewer's Yeast is a complementary feeding stuff for equine animals. Feedmark uses nothing in the formulation of this product that contravenes competition rules.

Nutrition Information

Brewer’s Yeast provides a natural way to supplement your horse’s diet with B Vitamins and amino acids. The amino acid content and prebiotic action makes it an excellent supplement for poor-doers to assist with improving condition, in combination with exercise. Some compounds within Brewer’s Yeast may also support immune function. Commonly, Brewer’s Yeast is also fed to promote relaxation


Brewer's Yeast


Crude protein 40.2%, Crude oils & fats 1.5%, Crude fibre <0.1%, Crude ash 12.1%, Sodium <0.1%

How does Brewer's Yeast support digestive function?

Brewer's Yeast is a prebiotic - a food source for the hindgut bacteria. It helps to feed the good bacteria in the digestive tract which supports and maintains a healthy hindgut environment. 


What is Brewer's Yeast made from?

Brewer's Yeast is derived from the Saccharomyces cerevisiae strain of yeast. It naturally contains high levels of B vitamins and Amino Acids (the building blocks of protein).


How will feeding Brewer's Yeast benefit my horse? 

Brewer's Yeast is a good source of protein and will provide the building blocks for muscle development. Brewer's Yeast also contains Vitamin B1 (Thiamine), which is known for its calming properties and the amino acid Tryptophan which is used by the body to make Serotonin.