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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 Powder 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. So 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.

Chastetree berries, Cramp bark, Magnesium oxide, Black cohosh (root, ground), Withania, Carrot (dried), Sunflower seed, Cynanchum, Immortality herb, Calcium carbonate, Rosehip shells, Skullcap, Omicha berries, Mushroom (dried), Dried algae (Chlorella sp), Ginger root, Liquorice root, Turmeric, Rapeseed oil (refined), Cane molasses, Lignocellulose, Wheat feed, Glycerine, Maize cobs.
Analytical Constituents
Crude Ash 23.70%
Crude Protein 6.15%
Crude Fat 9.44%
Crude fibre 19.60%
Acid Insoluble Ash 4.73%
Sodium 0.06%
For use where behavioural changes and tension are seen in mares which can affect temperament and performance.

Introduce gradually for fussy feeders. Loading rate may be used initially and during peak times of her season.

Also suitable for colts and geldings showing ‘riggy’ or stallion like behaviour.

Not recommended for pregnant mares and discontinue use on brood mares two months prior to covering. Maintenance levels may be adjusted to suit the individual and are not necessarily related to bodyweight. Also suitable for colts and geldings showing ‘riggy’ or stallion like behaviour. Not recommended for pregnant mares and discontinue use on brood mares two months prior to covering.
Horses & Ponies g per day scoops per day
Loading rate (7-10 days) 30 3
Standard Maintenance 10-20 1-2

Eva Mawby & Pandora

I have been feeding Oestress to my mare Pandora as she gets very sharp when she's in season. It has helped her no end and now I swear by it as it keeps her in top form regardless of whether she's in season or not. I barely notice when she comes into season now; she's not only more relaxed but she's much easier to handle and is a lot less stressed. She used to get very attached to all other horses and could never be left on her own without starting to box walk and worked up. Now she is more than happy to stand by herself. #Oestress #Forallseasons


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.


Chloe Jones & Rosie

"This is me showjumping my little mare Rosie. She is fed on Oestress & GastriAid and is looking and feeling amazing. Thank you NAF!"


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


Michelle Bates

"Oestress has really helped my mare who has had some particularly strong seasons this year."


Helena Troughton & Holly

"Our gorgeous mare Holly has really benefitted from Oestress, we saw a difference in just 48 hours!! We wouldn’t be without it now and recommend it to everyone, it's an amazing product."


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."


Hayley Marie Jones & Zara

"I love Oestress and would never be without it; because of that it’s a permanent fixture in our feed room which we recommend to everyone with mare with any hormonal issues. Zara loves Oestress because it means she can feel like herself all year round but more than that, Oestress is a product that works and understands the complexities of a great mare."


Minnie & Angel

"I feed Oestress to Angel because I find it has really helped her hormones and how she acts when she is in season. She would try to bite you whenever you went near her but since she has been on Oestress she hasn’t tried to bite me once. She is a lot happier in herself."


Chloe Shannen & Rosie

"I absolutely love Oestress, it makes Rosie so much more manageable and it takes away a lot of stress from both of us so that we can concentrate on the fun stuff."


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.


Carla Danby & Fern

“Oestress has settled Fern’s seasons and temperament down so much, she's a much happier girlie.”


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.”


Annie Oneill & Missy

"NAF oestress is the perfect supplement for my mare Missy. It balances her hormones and makes sure she is always top of her game."


Kelly Walsh & Queenie

"I have been loving using Oestress this year finding it helps to keep a much more level head on my mare and we can continue as we would in the winter."


Debbie Dyke

"Since first having my mare, I found it incredibly hard to warm up at competitions, to the point of retiring before I'd even got in the dressage ring. When in season she was cranky and would resist to go in a straight line. I researched and popped her on Oestress. From that day on, I never looked back. My marks improved, she got straighter in her movements, I didn't actually notice when she was in season. I've stayed on this product for the four years she has now been with me."


Sophie Lamb & Tolly

"This is Tolly who I love very much, my favourite two products are Oestress and D-itch because they work so well and the D-itch smells really nice."


Sarah Bunce

"After having 2 years of what seemed to be an endless cycle and a very 'flirty' mare, I decided to try Oestress. I was sceptical I will admit but WOW, she is so much calmer and I am keeping her on a continued dose."


Jane Nash

“She was the devil before using Oestress. She is amazing now thanks to it!”


Helen Walker Langton & Jemoon Rock Chick

"Jemoon Rock Chick is a 6 year old three quarter tb quarter Cleveland bay that we bought direct from the jemoon stud last October. She was successfully shown as a foal at foot with her dam Newtownhen by the studs stallion Jemoon Celtic Warrior. We intend to bring her out as a novice riding horse/intermediate later this month. We find NAF Five Star Oestress easy to use and jemoon rock chick eats it readily. She is calm and sensible and we are going to continue to use naf five star oestress throughout the show season."



This is us last week! Lovely clear round! Since been on NAF oestress Bee is a lot more focused on her job and no more napping when in season! And not nearly as grumpy! Excellent product!


Magic Magic Liquid Instant Magic
Oestress Oestress Liquid


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