Synovium® Gastrosafe – Healthy Gut

£47.99£126.00 Inc. VAT


Veterinary gastric aid and gut balancer for horses: Gastrosafe offers a innovative and proven formula to support optimal gut health in horses

  • Award Winning & Scientifically Proven Horse Ulcer Supplement
  • Leading gut balancer for horses which aids in a healthy front & hind gut
  • Developed by our leading vets and equine nutrition experts
  • Natural anti-inflammatory with essential proven prebiotics
  • Ideal supplement for horses during and after veterinary treatment
  • Undergone extensive clincial trials for optimal gastric aid
  • 1.5kg tub gives 1 months supply

Synovium Gastrosafe is a trialled veterinary gut balancer and horse ulcer supplement. Developed to support a healthy stomach environment and aid digestive function.

It has been extensively researched by a veterinary team and nutrition experts for optimal gastric aid.

Gastrosafe helps control gastric acidity in horses, provides essential proven prebiotics, whilst supporting the natural anti-inflammatory processes in the front and hind gut.

Suitable for horses with poor appetite, poor condition, poor performance and behaviour changes.

Ideally fed to horses during or after veterinary treatment for ulcers to help support a healthy gut environment, providing a natural alternative to maintain a healthy GI tract and a happy horse.

A veterinary gut balancer will provide support to horses during stressful activities, travelling, competition and change in routine.

No ingredients in Gastrosafe are listed on the FEI prohibited substances list. Competition Legal, Anti-Doping checked.

1.5kg (1 month supply) / 4.5kg (3 month supply)


Our Award Winning and scientifically proven Gastrosafe has been extensively researched and trialled by our leading vets.

Figure 1 below shows the differences in ulcer score between the first and second examinations, carried out 6 weeks apart, for both supplemented and controlled horses.

The average ulcer score for the group supplemented with Synovium Gastrosafe decreased from 1.82 to 0.91, whilst the average score for the controlled group increased from 1.5 to 1.66.

This study shows the effectiveness of Gastrosafe, as a nutritional adjunct in the management of equine gastric health. A leading horse ulcer supplement.


Gastrosafe gut balancer study

Use Horse Ulcer Supplement Gastrosafe
Veterinary gastric supplement for horses; for use on horses with a sensitive gut. A proven gut balancer for horses prone to ulcers.

Gastrosafe Horse Ulcer Supplement contains:

Calcium carbonate – Antiacid
Seaweed – Vitamins, Minerals and Trace Elements
Magnesium Hydroxide – Antacid
Fructooligosaccharides Prebiotics
Glutamine – Amino acid
Threonine – Amino acid important for mucin production in the gut
Kaolin – Anti-Diarrheal


Weight N/A

1.5kg, 4.5kg


Calcium carbonate (E170) 300,000mg (300g)= 9,600mg (9.6g) per day
Seaweed (Laminaria hyperborea) 150,000mg (150g) = 4,800mg (4.8g) per day (Natural vitamins, minerals and trace elements)
Magnesium Hydroxide (E528) 150,000mg (150g) = 4,800mg (4.8g) per day (Antacid)
Fructooligosaccharides 150,000mg (150g) = 4,800mg (4.8g) per day (Prebiotics)
Glutamine 57,000mg (57g) = 1,824mg (1.82g) per day (Amino Acid)
Threonine 4,720mg (4.7g) / 100 gr
Kaolin 15,000mg (15g) / 100 gr

Crude protein 14.3%
Crude oil 2.1%
Crude fiber 0.8%
Crude ash 40.82%
Sodium 1.12%
Calcium 8.47%
Magnesium 4.17%



**Measuring spoon of 50 ml contains 48 grams.

Horse Loading: add 2 scoops per day to feed for 10 days, split into two feeds for best results. Continue on 2 scoops if directed by your vet.

Horse & Pony Maintenance: add 1 scoop per day, split into two feeds for best results ( 1.5kg = 1 month supply / 4.5kg = 3 month supply )

Foal: add 1/2 scoop to the feed daily, split between feeds where possible.


Gastrosafe Datasheet

6 reviews for Synovium® Gastrosafe – Healthy Gut

  1. Gemma Dennis

    I’ve been using a number of Synovium supplements on my horses for the last few months. Cobey my showjumper is on Agility Electrolytes Q and Gastrosafe to keep her in top condition with her busy competition schedule. She feels better than ever and performing at her best. Lily my retired showjumper is on BioBute to help with an old injury and also Airplus Liquid due to being diagnosed with mild equine asthma this year. her breathing is back to normal and she is looking great! so much so that she may even be fit enough to do some dressage soon 😁 I would highly recommend these supplements due to the in-depth research and trials they go through and my own experiences using them.

  2. David Coombs

    We really rate this product . We have a very sensitive mare on it and really feel she has improved on it . She has always struggled with a sensitive tummy we have tried lots of different products and this is by far the best.

  3. Aimee Jones

    One of my top horses suffers from ulcers and this causes him to drop condition very easily. Since feeding him the Gastrosafe supplement, I have seen a drastic improvement. He looks better in himself and has become stronger physically. I highly recommend this product as it has helped Pod’s performance immensely.

  4. v.hipkins

    I can not recommend this supplement enough. After trying many different supplements for my horse following reoccuring ulcers, Synovium Gastrosafe has been the first to actually make a difference. I heard about it from a friends vet so decided to try it as my horse was acting up again. He was often sharp, reared and struggled to keep on weight and condition. In 4 weeks he started to become more settled in the stable and enjoyed being handled and riden. After 6 weeks I noticed a huge difference in his condition, he is holding weight and now devloping muscle. His whole attitude has changed and has not reared in months, his jump has improved now he is more relaxed and I have been able to up his training without arguments. It really has been a game changer, I have been using it now for 6 months and will not be taking him off it.

  5. Daisy mckinlay (verified owner)

    Can’t recommend this product enough! I’ve had my best horse on the gastro safe supplement for a couple of months now and he is so much happier. Having tried loads of different brands before, I can really tell the difference with synovium! 100% the best for horses struggling with bad ulcers.

  6. Julia Derosa (verified owner)

    Verified reviewVerified review - view originalExternal link

    Have only started using this, so a bit soon to give a proper review.

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