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Science Supplements ProKalm (Equine)

An innovation in helping manage:
- Anxiety
- Worried horses
- Stereotypical behaviour
- Challenging behaviour
- 1.1kg tub gives approximately 5 weeks supply

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RRP £9.99

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ProKalm is an innovation in managing anxiety in horses and ponies allowing them to perform to their potential. Once horses become anxious they may develop behaviours that make managing them difficult such as poor concentration, spooking, bolting, pulling, wind-sucking, crib biting, pawing, stamping and box walking.

ProKalm contains 4 different novel ingredients to help reduce anxiety and nervousness. ProKalm acts rapidly in as little as 30 minutes and the effects can last up to 8 hours. At low intake ProKalm is perfect for “taking the edge off”. At moderate intake, ProKalm is suitable for more demanding situations and at the highest level of intake can be used for horses that are difficult to handle for example during clipping, shoeing, travelling, backing etc.

ProKalm can be fed as required, either for isolated situations or as a daily feed to achieve sustained reductions in anxiety.

An innovation in managing anxiety in horses allowing them to perform at their potential. Rapid acting and effective calming supplement with results in as little as 30 minutes from feeding. A unique combination of herb extracts and amino acids and does not contain valerian, magnesium or tryptophan. ProKalm does not sedate or affect gait or performance

How ever well you manage horses, they are all individuals. Once horses become anxious they may develop behaviours that make managing them difficult to ride or handle. Other anxiety related problems can include failure to train properly, poor recovery from exercise and competition and loss of performance. ProKalm reduces anxiety leading to better control, better concentration, relaxation and easier management

For any anxiety-related problems or conditions. ProKalm is perfect for “taking the edge off” horses. At moderate intake ProKalm is suitable for more demanding situations and the highest level of intake can be used for horses that are difficult to handle, for example during clipping, shoeing, travelling, backing, etc. ProKalm can be fed as required, either for an isolated situation such as competing or can be fed daily to achieve a sustained reduction in anxiety. Uses of ProKalm include: Aggressive behaviour, anxiety, breaking to saddle/harness, starting stalls, bolting, box rest, box-walking, clipping, covering (mares or stallions), dangerous horses, dentistry, difficult horses, introduction to a new herd, introduction to a new yard, massage, problem horses, physiotherapy, rearing, rehabilitation, shoeing, to aid training, to improve concentration in competition, transportation, turning out after box rest, vaccinations, vet visits, weaving, wind sucking

ProKalm is best given in feed on a regular basis. The effects of a single serving can begin within 30 minutes and last for up to 8 hours. The amount given can be varied to get the desired effect. Some horses require higher rates than others. For a strong calming effect, e.g. to clip, shoe, box or when first turning out, give 2-4 scoops for a 500kg horses in feed or mix with a little water and syringe around 1-2h before peak effect is required. For a mild-moderate calming effect , e.g. for riding, travelling, etc give 1-2 scoops for a 500kg horse in feed or mix with a little water and syringe around 1-2h before peak effect is required. For sustained calming over time, for anxious horses or those with vices e.g. cribbing, give 0.5 to 2 scoops for a 500kg horse in both morning and evening feeds for at least 7 days. For first time use we strongly recommend feeding 2 x 25ml scoops per day split between morning and evening feed for a 500kg horse. If the effect is too strong then reduce the level

If after 1-2 days the effect is not strong enough then increase to 4 x 25ml scoops per day and up to 6 x 25ml scoops per day after a further 1-2 days

Why not magnesium? There is no scientific evidence that magnesium has any calming effect in horses.
Why not valerian? It is illegal under FEI and rules of racing.
Why not tryptophan?: Tryptophan signals to the body that it is exhausted and has a negative effect on performance
Why not acepromazine (ACP)? ACP during exercise increases risk of in-coordination, stumbling and injury.

The Clinical Trials:
The effect of feeding domestic horses a herb extract and amino acid based calmer (PROKALM): a double blind placebo controlled trial. This is the summary of an independent study conducted at Hartpury College*.

Introduction: There are a very limited number of studies examining the effects of calming products on equines and the mechanisms underlying their use. Therefore many of the products on the market are not supported by scientific evidence (Harris, 2007); most companies rely on owner testimonials to evaluate their use, and they do not use controlled trials to demonstrate efficiency (Mckeever, 2005). The aims of the present study were 1) To determine if the reactivity of horses to a novel object test altered after seven days of feeding a commercial calmer (ProKalm, Science Supplements Ltd) 2) To determine if carers and instructors assessed the horse’s behaviour and temperament as having altered after supplementation.

Methods & Materials: Sixteen mature horses without extreme behaviours were selected by the yard manager to participate. All horses were weighed on a calibrated weigh bridge to determine the quantity of supplement they received. Horses weighing over 600 kg received 5 scoops of the supplement daily and those weighing less than 600 kg received 4 scoops of the supplement daily (in accordance with the manufacturer’s instructions). The horses were randomly assigned into two groups, one half that received supplement X and one half that received supplement Y for seven days. All horses completed a novel object test and had a temperament questionnaire completed by a student carer and two instructors on day 0. The horses were then fed their allocated supplement for seven days and on day seven underwent a novel object test and the questionnaire was repeated, to assess any changes in behaviour and temperament (both undesirable and desirable behaviours). During the seven days the horses’ management regimens were kept consistent.

Results: Novel object test: Horses in the treatment group ‘settled’ significantly faster on day 7 than day 0 (P<0.05), and significantly faster than the horses in the placebo group (P<0.05). Horses in the placebo group increased their vocalisation and object investigation on day 7 compared to day 0 (P<0.05), whilst those in the treatment group demonstrated a significant increase in alert behaviours only (P<0.05).

Conclusion: In a group of horses with a range of behaviours typical of horses used for teaching, feeding ProKalm for 7 days resulted in both objective and subjective improvements in behaviour that could be considered desirable for handling, riding, training and competing.

*Helme, J. and Dumbell, L. (2009) Equine Centre, Hartpury College, Hartpury, Gloucester, UK

The effect of feeding horses exhibiting stereotypical behaviours a commercial calming supplement

Introduction: Stereotypical behaviours are common in horses. The purpose of this study was to determine whether a commercially available equine calmer (ProKalm, Science Supplements Ltd) could abolish or reduce the severity of stereotypical behaviours in horses.

Methods & Materials: Fifteen horses exhibiting stereotypical behavior on a chronic and continuous basis were recruited to take part in the study. Owners were given a questionnaire and asked to describe the type of stereotypical behaviour and rate the severity on a visual-analogue scale with 0 being no stereotypical behavior observed to 10 being most severe stereotypical behavior. The behaviours reported were wind-sucking (n=5), crib-biting (n=4), weaving (n=4), box-walking (n=2). Three horses exhibited 2 different stereotypical behaviours. Owners were asked to score the horses on Day 1 (prior to treatment) and then on Days 2 and 3. All horses received 64g of ProKalm split equally between morning and evening feeds.

Results: All horses ate all treatments. The median behavior severity score on Day 1 was 7 (range 3 to 10) and reduced to 4 (range 0 to 8) and 2 (range 0 to 8) on Days 2 and 3, respectively. Three horses (who all exhibited wind-sucking with a severity score of 7 or 8/10) showed no reduction in behavior severity score as reported by their owners. The greatest reduction in behavior score was with horses showing weaving and crib-biting. Behaviours reduced on both days of treatment.

Conclusion: Feeding 64g of ProKalm for 2 days split between morning and evening feeds to horses with stereotypical behaviours resulted in a significant reduction in median behavior severity score, as reported by owners. The effect was strongest with horses exhibiting weaving and crib-biting. Further studies using higher doses and for a longer duration are warranted.

More Information

Brand Science Supplements
Complies with Jockey Club/ FEI Rules YES
Condition new
Instructions for use Instructions and feeding guide for powder:
Pony - approximately 250kg - 1-3 scoops per day
Horse - approximately 500kg - 2-4 scoops per day
Large Horse - over 750kg - 2-6 scoops per day
Level 25ml (16g) scoop
Always start with the minimum feeding rate. If after 2 days a stronger effect is needed then increase the daily feeding rate to the maximum. Individual horses may respond differently and the level of intake should be adjusted to obtain the required effect. The effects of ProKalm may be seen in as little as 30 minutes and can last up to 8 hours. Peak effects are usually observed 2-4 hours after feeding.

Instructions and feeding guide for syringe:
Pony - approximately 250kg - 1/2 syringe
Horse - approximately 500kg - 1/2-1 syringe
Large Horse - over 750kg - 1/2-1 syringe
Syringe contains 60g of paste
Can be used as a one-off or in conjunction with the powder as a top up. The effects of ProKalm may be seen in as little as 30 minutes and peak effects are usually observed 2-4 hours after feeding.
Maintenance Feeding Rate (average size animal) 2 scoops per day (32g)
How long will it last (days)? Fed at 2-3 scoops a day, a 3.3kg tub will last approximately 14 weeks, a 1.1kg tub will last approximately 5 weeks and a 192 pouch will last approximately 1 week.
1 syringe contains 2 servings
Approx cost per day Pouch - £1.65 per day, 1.1kg - £1.45 per day, 3.3kg - £1.36 per day
Ingredients Label A unique combination of herb extracts and amino acids. Composition: Rice flour, herbal extracts


At Supplement Solutions, we understand that our customer requirements vary. That's why on checkout, our website will offer you a range of shipping options based on the weight and value of products ordered, allowing you can choose the one that best suits you and your order. Once your order leaves us, you will receive an email confirming the date and method of dispatch.

All UK mainland orders (excluding the Highlands of Scotland) over £75 qualify for free Standard shipping. For all other UK orders, we currently offer STANDARD, PRIORITY & SAMEDAY DISPATCH options, along with delivery via Royal Mail and Parcel Force. Our delivery options are calculated on the weight and value of items ordered. If your order is urgent, please select SAMEDAY DISPATCH and we will do our best to ensure your order is dispatched, and will contact you immediately if we cannot fulfill your order.  We offer several next day options, however, the only Guaranteed Next Day delivery is via Royal Mail Special delivery, so please ensure you select that option. Our cut off time for Urgent/Guaranteed orders is 3pm. However, we will try our best to dispatch any Urgent/Guaranteed orders after this where possible. Please contact us by phone if you have an specific delivery or urgent product request.

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Customer Reviews

The only calmer that works for my mare Review by Laura Thyer
I have experimented with different calmers for my mare. She is sharp and extremely sensitive dressage horse - training at PSG.
This makes her amenable and attentive where other calmers haven't touched her or they have been too strong and she was almost dopey!
I would extremely recommend this product. Thank you! (Posted on 29/04/2019)

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Science Supplements ProKalm 1.1kg

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Tel: 01995 672464

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