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Stamina Plus -fitness & endurance

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L-Carnitine supplement for increased  fitness and endurance for working and sporting dogs


A dog that takes part in high demand activities or indeed any long period of work calling for stamina and energy may find its natural system for producing the chemical L-Carnitine unable to keep up with demand.

L-Carnitine is an amino acid like compound produced naturally in the dog’s liver and kidneys which is then transported through the bloodstream to muscle cells. There it converts fat reserves to sugars whose metabolism then releases energy and stimulates muscle action and growth

A temporary deficit of L-Carnitine can lead to reduced energy and symptoms of fatigue and slow recovery time or the inability to develop stronger muscle power despite exercise and training


What is L-Carnitine?

 L-Carnitine is small peptide/amino acid that is essential in all animals for the production of energy. Carnitine is needed by the body for the metabolism of fatty acids into energy in the cells. It helps the body utilize fat for conversion into energy while maintaining the lean muscle mass, which helps reduce the overall body fat. It may also help decrease the levels of cholesterol and lipids (fats) in the blood. 

Because L-Carnitine is essential in the process of converting fatty acids into energy a deficiency may result in increased fat storage, decreased performance, and, potentially, an increased risk of heart disease. A temporary deficit of L-Carnitine can lead to reduced energy and symptoms of fatigue and slow recovery time or the inability to develop stronger muscle power despite exercise and training. 

The natural source of L-Carnitine is fresh meat and milk, however manufactured pet foods frequently contain less than 5% of the L-Carnitine of fresh meat. With the vast majority of pets being fed on manufactured diets, supplies of L-Carnitine in the diet are often insufficient. Synthesis in the body occurs mostly in the liver. 

However skeletal and heart muscles, which use 95-98% of the supplies, cannot synthesise their own L-Carnitine and this explains why deficiency most commonly occurs in these tissues. 

The dog in particular is a species predisposed to a deficiency of L-Carnitine. This is because there is a high level of L-carnitine excretion via the urine and very little re-absorption through the renal tubules.


This liquid is given orally, preferably twice daily, to increase stamina and performance. It can be easily added to feed or introduced directly into the dog’s mouth. It can be fed long-term as part of the dog’s maintenance regime or given for specific times when an extra challenging day is expected. In the latter case, be advised that the L-Carnitine present in Stamina Plus takes approximately 3 hours to reach its maximum benefit and stays at that level for a further 3 hours before gradually diminishing in its effect. As with the other products, daily usage is calculated according to the dog’s bodyweight and the daily feeding level is 1-2 ml per 10kg (22lbs) of bodyweight twice daily.


Stamina Plus contains 400mg/ml of L-Carnitine and 100mg/ml of Magnesium Aspartate Hydrochloride


Delivery Service

Our normal delivery service will be either: Royal Mail First Class: £3.91 This will apply to each order for deliveries within the United Kingdom. Please allow up to 5 working days for delivery. Delivery to the EU: £7.50 Delivery to the Rest of the World: £11.25

Free Delivery

We are able to offer a free delivery service for orders of £22.50 or more. Please note that the free delivery option is only available to UK addresses.

Returns Policy

If you wish to return an item for any reason please call or email us and we will advise you further. Items ordered in error may be exchanged for the correct product providing they are returned unopened. Further payment may be required to cover differences in cost. All refunds will be credited to the card from which payment was made. Please include a covering letter with your return stating your name, address and reason for the return.

Returns address:

Ace Canine Healthcare, March Laboratories Ltd, Great Oaks Sites, B4526 Goring Health, Reading, UK, RG8 7SB

Tel: 0118 9842871


Orders may be cancelled up to fourteen days after delivery. It is an express condition that the product must be returned to us unused, unopened and with the original documentation (as sent with each parcel and/or package). We reserve the right not to refund postage charges at our discretion. You must provide written confirmation of your order number and an explanation for the reason for cancellation

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