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Chastetree Berry

To support normal hormone levels and responses

25 reviews. 4.8 / 5
Judith - 15/08/2022 09:40
My mare has been much more settled.
Debra - 31/01/2022 11:24
Have used this product before to help my 43 year old pony with his cushings. Along with the conventional veterinary treatment. I believe it helps keep it under control.. it comes in a fine palpable powder which he is happy to eat in his wet feed.
Alyson - 18/11/2021 10:57
Not certain if this is helping but worth a try as she is very mareish at moments
Trusted Feefo Customer - 30/09/2021 16:41
just received so will be able to answer in a few weeks.but was recommended by a friend whose horse is off normal medication now and just has the chastetree berry supplement
Hilary - 19/08/2021 08:12
Works great on my Welsh cob
Trusted Feefo Customer - 12/08/2021 19:44
Caught Cushings early and this supplement is amazing and we have a normal reading again.
Trusted Feefo Customer - 19/04/2021 08:03
Have used this on my mare for two months and its doing its job
Hilary - 22/02/2021 11:14
I haven't been using it for too long but so far so good, would prefer to review after a few more weeks
Morag - 15/01/2021 09:39
Have an older mare showing signs of cushings and this product has helped her no end.
Hilary - 27/10/2020 10:05
Good product, but not been using it long enough to fully asses effect.

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Nutrition Information

Chastetree Berry (Agnus-Castus) is also known as Monk’s Pepper and was first recorded as being used by Hippocrates in the 4th century AD.  Chastetree Berries have long been fed to horses and ponies to support hormonal challenges, and to older horses that require pituitary support.

Unsuitable for pregnant mares


Chastetree Berry powder (Agnus castus), Calcium carbonate (for product consistency)


Crude protein 2.2%
Crude oils & fats 1.5%
Crude fibre 24.9%
Crude ash 51.8%
Sodium <0.1%

Feeding Guide

Weight of Horse/Pony Amount per day                                  
Up to 400kg ⅓ scoop
Over 400kg ¾ scoop


1 level (50ml) scoop of Chastetree Berry weighs approximately 27g

Unsuitable for pregnant mares due to the hormonal action of this herb.
If wanting to feed to pregnant or lactating mares seek veterinary advice prior to adding to the diet.

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

Chastetree Berry is a complementary feeding stuff for equine animals. Feedmark uses nothing in the formulation of this product that contravenes competition rules..