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NAF, Nutritional Advanced Formulas for horses and ponies Stay Save Keep in Touch Stay Save Keep in Touch
Supports the mare's natural oestrus cycle by encouraging regularity and balance
Supports the mare's natural oestrus cycle by encouraging regularity and balance
Supports the mare's natural oestrus cycle by encouraging regularity and balance

Oestress Liquid

Oestress Liquid is a fast acting liquid tincture which compliments the mare's natural oestrus cycle by encouraging regularity and providing extracts of herbal ingredients that have been used for hundreds of years to support hormone balance. By improving her diet with Oestress, you are helping your mare to help herself. Oestress also provides bio-available magnesium to relax muscle tension and encourage calmness. Lastly, Oestress is rich in natural antioxidants to naturally support a healthy system. Oestress should be fed daily throughout the spring and summer season and may be increased in accordance with her oestrus cycle. However, if needed Oestress is suitable for year round use.

Water, Magnesium chloride, Glycerine, Chastetree berries, Black cohosh, Crampbark.
Additives (per lt)
Ginger 11.7 ml
Milk thistle 26.5 ml
Rose (rosehip) 23.5 ml
Turmeric 14.7 ml
Analytical Constituents
Crude protein 0.8%
Crude fat 0.3%
Crude ash 2.4%
Crude fibre 0.1%
Moisture 89.4%
Sodium 0.03%
Feed whenever seasonal behavioural changes and tension are seen in mares which can affect temperament and performance.
Horses & Ponies ml per day
Peak rate (3-7 days) 75-100
Standard Maintenance 25-50

Mollie Sydenham & Penny

I’ve used Oestress for my mare as she was super grumpy and untouchable especially when in season. I honestly would never take her off it as she is now an absolute angel!


Jean Langrish

I use Oestress all year round for my mare, it’s made a huge difference to her. Knowing she’s comfortable gives me peace of mind.


Maxine Lowrie & Ginger

Since feeding Oestress Ginger is so much happier and less ‘stressy’ and the tension is hugely improved. Oestress has been a real tonic, can’t believe the difference. Photo Copyright: Mark Beaumont


Alex Mobbs & Lola

"Lola has been utterly transformed with the help of this game-changing supplement!"


Bethany Moxam & Smartie

"We use Oestress with Smartie all of the time now! We've found that this year she's much more consistent and less stressed when she's on it."


Liz Husband & Dancer

Dancer is skewbald but with all the attributes of a chestnut mare! Thankfully NAF Oestress keeps her in check.


Rachel Handley-Greaves & Bee

Bee is the boss but her grumpiness has gone now when in season thanks to NAF Oestress.


Charlotte & Seren Challenge

NAF Oestress has changed my mare for the better! She is so much more comfortable in herself and rideable during her seasons. It has really helped us both keep training without all the mareish behaviour. She was so unhappy during her seasons, sometimes she would refuse to move! Now we have none of that behaviour. I would 100% recommend Oestress to anyone with a mare showing even just slight discomfort during her seasons - it has been a godsend for us.


Claire Tuff

When we first set out we would be more cautious of owning mares. However, over the years we have grown to favour them. NAF Oestress has helped keep them on top form and easier to handle around the stables. We highly recommend it for both maintenance and to help with peak hormonal cycles.


Nicole Mills & Primitive Origin

We use an awful lot of the NAF products, they are great!! We have a yard of up to 18 horses ranging from homebred foals to 4* international event horses. We’ve been using NAF Oestress for our mares for nearly two years now and highly recommend the product. I first decided to try NAF Oestress on my homebred novice event mare to help keep her level throughout the event season. She’s an incredibly tough little horse who only shows mareish tendencies when travelling, however I wanted to make sure she was feeling on top form no matter what stage of her season she was going through. As a matter of course I decided to put the other mares on the yard on this product and it’s something we use all year round.


Tom McEwen

NAF Oestress plays a fundamental role in the performance and training of my mares on the yard. I find it helps them relax and focus on the job in hand. You really can’t beat a good mare for competition.


Nicky Latham & Thyne Gale

Thyne Gale is a typical thoroughbred mare and NAF Oestress keeps her very level and non stressy, I couldn’t be without it. She is an all-rounder who mainly events and Oestress definitely makes the difference.


Nicky Latham & Pantywaun Sioux

My mare Pantywaun Sioux is on NAF Oestress. She’s currently competing at British Dressage elementary level and is aiming towards medium next season. Oestress helps to keep her very level headed, to be honest it’s a godsend, especially when competing.


Maria Docherty & Thalia Grace

Gracie came home to me off the track at 6 years old. She was underweight, highly strung, bolshie when handled and spooky when ridden. Her happy place was the field and it used to take me up to 4 hours to catch her as she would only come in when every other horse on the yard was in. Her hormones were raging, even out of season she formed very strong attachments to other horses meaning leaving the yard was almost impossible. I tried other supplements which did not seem to work. One day a representative from NAF came to the yard to talk about their range of products. She was extremely informative and patient when I had so many questions regarding what products would best support Gracie’s hormone balance. She recommended Oestress. Once the initial loading dose took effect the difference was amazing. Gracie can now process situations in a more logical manner and very rarely reverts to her normal flight behaviour. She holds her weight well and is in excellent all round health. With NAF’s Oestress, we are now able to enjoy a summer of fun rides, showjumping and even a bit of dressage. Cheers NAF!


Ashlene Bagshaw

I use NAF Oestress powder for a just backed 4 year old by Don Nobless out of a Worldly (Weltmeyer) as well as for her half-sister by Dark De Niro. Oestress keeps them level headed and able to focus on work all year round.


John Bowman & Emotion

“We use NAF Five Star Oestress on all of our showjumping mares as we find it helps keep them relaxed throughout their body and in their temperament.”


Sue Brougham & Lisboy Angelina

"Oestress keeps the Angel in Angelina. We feed the solution. It really makes a HUGE difference. From handling Angie on the ground to when being ridden. She is just so much more comfortable in herself."



Miss Congeniality (Genie) is a 10 year old unregistered Welsh Cob who I have owned since a 4 year old. Initially shown with good success at local level we then turned to dressage. She is a typical opinionated welsh mare – if she doesn’t want to do it you do not stand a chance and you have to convince her that it is actually on her terms. My local tack shop, Pinkers Saddlery, recommended Oestress to me a few years ago and I decided to try her on the liquid. Since feeding Oestress she has been so much easier to work with and our results at dressage have improved. We have been to the BRC Dressage Championships at Royal Windsor in 2012 where we came 7th, the BRC National Championships at Lincoln in 2012, and most recently in 2014. This year we were in the Prelim Riding Test where we won our arena on 80%, something I doubt would have happened without Oestress as when I have run out I have noticed the difference in her. Thank you NAF!



Esme is a twelve year old British Warmblood, we enjoy happy hacking these days with a bit of competing locally when we get the chance. I had trouble with tacking up and getting on as Esme was so tense and felt ‘cold-backed’. I had never thought of using a hormonal supplement as there seemed no particular pattern to her behaviour, so had not connected the unpredictability with her seasons. I was sceptical of any hormonal supplements but cannot believe the difference in her behaviour which I noticed within a week of feeding Oestress liquid. I can now go for a hack and know that I am going to get back to the yard in one piece! I can see that her whole body has relaxed and she is much happier in general. Charlotte Walters


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Oestress Oestress Liquid


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