NAF Five Star Oestress Calming Supplement for Horses

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

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  • Liquid » 1 litre Bottle £29.00
  • Liquid » 2 litre Bottle £37.49
  • Liquid » 5 litre Bottle £84.99
  • Powder » 500g Tub £23.99
  • Powder » 1kg Tub £41.99
  • Powder » 2.5kg Tub £95.79

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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
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  • Sat: 9:00am - 1:00pm
  • Email: [email protected]

All prices include VAT where applicable.

Reviews (53)

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

Overall 5
Ease Of Use
Value For Money
Absence Of Side Effects
53 out of 53 (100%) customers would recommend this product.
5 stars (46 reviews)
4 stars (6 reviews)
3 stars (0 reviews)
2 stars (1 reviews)
1 stars (0 reviews)

Only verified purchasers of this product can leave a review.

55 Loves it!
Verified Purchase

By on 28 January 2022

My mare is so much calmer when in season due to this product, will defo carry on purchasing, cant recommend enough.

Customer recommends this product

55 Amazing service
Verified Purchase

By on 27 January 2022

Great product works well and give it all year round

Customer recommends this product

55 Brilliant!
Verified Purchase

By on 20 January 2022

Does exactly what it says it does, my is great using oestress, wouldn't be without it 👍🏻

Customer recommends this product

55 Oestress calming supplement
Verified Purchase

By on 9 September 2021

If you have a mare that turns into a monster when in season it's horrible. A friend told me about oestress supplement we had her on it all summer to ease her pain and temperament and it's made a huge difference. She's now on a maintenance dose until next spring. Great stuff wouldn't be without it.

Customer recommends this product

1 person found this review helpful

55 Excellent results on multiple mares.
Verified Purchase

By on 30 August 2021

Excellent results on multiple mares at the usual times of the year.

Customer recommends this product

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Q & A

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

24 February 2022 at 7:33am

Will this work to calm their desires?



Will this calm their need for ;), we are thinking of buying a horse but the owner have said she gets very full on when in season. Nothing nasty just really wants the geldings attention

Hope to hear from you


  • VioVet Staff

This supplement is aimed at calming stress related to the oestrus cycle so it will be good for this use. It may not reduce the urge to reproduce but it can reduce the aggression and behavioural changes surrounding this.

27 January 2021 at 6:09pm

Safe for laminitis horses?


Is Naf Oestress safe for a horse who is suffered laminitis (onset from steroids)

Thanks and regards

  • VioVet Staff

NAF Five Star Oestress does not contain any additional sugar or sugar products so I can confirm it is safe to use in a horse prone or suffering from laminitis.

23 December 2020 at 9:39am

Will this work for a extremely anxious mare?


My mare is extremely anxious and has sever seperation issues, will this help her relax at all?

  • VioVet Staff

This product is a calming supplement so should help with anxieties such as separation issues, however calming supplements generally only provide a mild effect. If the anxiety is severe then you may not see it resolve the problem. I advise trying a calming supplement such as this but also treating the underlying anxiety with behaviour training.
The Oestress supplement is more targeted for mares that are having season related stresses. I advise checking out NAF Five Star Magic if it is purely anxiety you are treating.

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.

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