Regular Delivery Service, let us remember for you!

NAF Five Star Oestress Calming Supplement for Horses

NAF Five Star Oestress Calming Supplement for Horses NAF Five Star Oestress Calming Supplement for Horses NAF Five Star Oestress Calming Supplement for Horses
Product image Product image Product image
Product image Product image Product image
Liquid » 1 litre Bottle Liquid » 1 litre Bottle Liquid » 1 litre Bottle
Liquid » 2 litre Bottle Liquid » 2 litre Bottle Liquid » 2 litre Bottle
Liquid » 5 litre Bottle Liquid » 5 litre Bottle Liquid » 5 litre Bottle
Powder » 500g Tub Powder » 500g Tub Powder » 500g Tub
Powder » 1kg Tub Powder » 1kg Tub Powder » 1kg Tub
Powder » 2.5kg Tub Powder » 2.5kg Tub Powder » 2.5kg Tub

Images are for illustration purposes only. Packaging may change from time to time and images on our website may or may not be updated.

  • Liquid » 1 litre Bottle £20.99
  • Liquid » 2 litre Bottle £37.49
  • Liquid » 5 litre Bottle £87.49
  • Powder » 500g Tub £23.99
  • Powder » 1kg Tub £39.99
  • Powder » 2.5kg Tub £99.99

Selection of 6 products from

£20.99 to £99.99


Five Star Oestress from NAF is a nutritious blend of herbal extracts which promotes aid for mares during season. The ingredients also act as a general supplement for the mare's hormonal system. As well as making her relax, NAF Five Star Oestress supports her system against anxiety and muscle tension. It also contains natural antioxidants to flush the system of toxins.

Available in both powder and liquid form, NAF Five Star Oestress should be fed daily through the spring and summer and can be incresed in accordance with the oestrus cycle. It can, however, be used all year round.



Water, Magnesium chloride.


Chastetree berries, Magnesium oxide, Cramp bark, Sunflower seed, Black cohosh, Brewers' yeast, Bitter orange peel (ripe), Rosehip shells, Thorowax, Carrot (dried), Ginger, Omicha berries, Dandelion leaves, Milk thistle seeds, Turmeric, Hawthorn berries, Blueberries, Gingko leaves, Rosemary, Tomato pulp, Angelica, Skullcap, Licorice, White mineral oil, Fructo-oligosaccharides, Apiculture by-product (bee pollen), Wheat protein.



Chastetree tincture 288 ml
Black snow ball tincture 240 ml
Sarashina shoma tincture 105 ml
Milk thistle tincture 26.5 ml
Immortality herb tincture 24 ml
Rose tincture 23.5 ml
Blueberry tincture 11.7 ml
Ginger tincture 11.7 ml
Gingko tincture 11.7 ml
Omicha tincture 11.7 ml


Vitamin A 95000 I.U.
Vitamin D3 15000 I.U.
Digestibility Enhancer
Saccharomyces cerevisiae CBS 493.94 4a1704 3.28 x 10^9 cfu



Protein 0.2%
Fat <0.1%
Ash 2.4%
Crude fibre 1.8%
Moisture 90.7%
Sodium 670mg/kg


Protein 8.9%
Fat 7.6 %
Ash 21.0 %
Crude Fibre 30.2 %
Sodium 1340 mg/kg

Feeding guidelines


Weight ml per day
Horses Peak Rate 100
Maintenance 25-50
Ponies Peak Rate 75
Maintenance 25-50

Ideally fed split between feeds. If feeding once daily best given in the morning. 5 litres fed at 25ml per day will last approximately 200 days. Maintenance levels should be adjusted to suit the individual mare, and are not necessarily strictly according to bodyweight. Also suitable for geldings showing "riggy" behaviour.


Weight g per day scoops per day
Horses & Ponies Loading (7-10 days) 30 3
Maintenance 10-20 1-2

One 20ml scoop provides approximately 10g of Five Star Oestress powder. The loading rate may be used to establish her on Oestress and also during the peak time of her season. Maintenance levels may be adjusted to suit the individual and are not necessarily related to bodyweight. Not recommended for pregnant mares. Recommended to discontinue use on broodmares two months prior to covering. Suitable for geldings showing ‘riggy’ behaviour.

Need help or advice? Contact us:

  • Landline: 01582 842096
  • Mon - Fri: 8:30am - 5:00pm
  • Sat: 9:00am - 1:00pm
  • Email: [email protected]

All prices include VAT where applicable.

Delivery Information

Reviews (38)

Summary of Reviews for NAF Five Star Oestress Calming Supplement for Horses

Overall 5
Ease Of Use
Value For Money
Absence Of Side Effects
38 out of 38 (100%) customers would recommend this product.
5 stars (33 reviews)
4 stars (4 reviews)
3 stars (0 reviews)
2 stars (1 reviews)
1 stars (0 reviews)

Only verified purchasers of this product can leave a review.

45 Excellent product and cheaper from this site
Verified Purchase

By on 28 November 2019

Take a couple of months but definitely helps with pre and during season tension

Customer recommends this product

55 Excellent product
Verified Purchase

By on 3 November 2019

So far Very pleased with this product easy to add, horse has had no adverse reaction & didn’t notice it being in being in her feed. Only just started using, need to use a little longer to see full effectiveness

Customer recommends this product

55 Works so well for my mare
Verified Purchase

By on 7 October 2019

I swear by NAF 5 Star Oestree, I have had my BB mare since she was 8 months old. I realised at an early age that she was extremely hormonal when she came into season. I had read about Orstress, so I decided to try her on it. I could see a difference in her. After some time I stopped giving her it, just to see if it made a difference to her. Well let’s put it like this, she is now 9 years old & she is still on it, she is so much happier on the Oestress. If n my horse is happy, then so am I.

Customer recommends this product

45 Very effective
Verified Purchase

By on 30 September 2019

I have used for years, helps my mares seasons

Customer recommends this product

55 Great product
Verified Purchase

By on 20 September 2019

My horse switched easily from the liquid to the powered form.

Customer recommends this product

Page 1 of 8

Next Page

Q & A

Below are some recent questions we've received regarding NAF Five Star Oestress Calming Supplement for Horses, including answers from our team.

1 May 2017 at 4:51pm

Can I feed alongside regumate?

Aimee holt

Hi there

Am I able to feed this alongside regumate or would you suggest sticking to just one or the other? My mare is having pain from ovaries which is causing her to be very sensitive to ride. I'm sure regumate will work in terms of stopping her coming inTo season but thinking maybe a herbal will also help her.

Also would you recommend this product or Dodson and horrell stroppy mare?



  • VioVet Staff

It would be perfectly acceptable to feed this supplement alongside Regumate. They work in different ways and could be very helpful to your mare. Although there have not been any clinical studies done to suggest how effective these supplements are people do report good results. With regards to the NAF or D&H supplement they are very similar and I can't say that I have found one to be better than the other. Sometimes one seems to work better than the other for certain horses but there is no exact science to it. I would just pick one to try and see how it works for your horse.

10 January 2017 at 12:15am

Powder or liquid?


Hi, is there a difference in the strength of product between the liquid and powder? Is one better than the other or just personal preference? The mare in question has painful ovaries and is feeling tender and grumpy, looking for something to soothe her so she can be ridden again! Thanks.

  • VioVet Staff

The choice between the two is basically personal preference. General advise to horse owners is to start the mare on the liquid as due to the solution extraction process for the herbs, we do find herbs in a liquid form become active within the system slightly quicker but the strength of the two is the same.