The Hanley Formula

The Original Hanley Formula is a pure amino acid concentrate powder that contains all 10 Essential Amino Acids which must be supplied in the diet (arginine, histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine) at levels never previously available in an equine supplement.

This is the best way to top dress your existing feed ensuring all types of horses are receiving the necessary Amino Acids for their varying life stages and work loads. 


Horses Need Protein

Protein is second only to water as the most abundant component of the horse's body.

Protein is made from chains of amino acids. Amino acids are the building blocks which make up over 75 % of your horses body. Twenty primary amino acids make up most proteins.

It is the different combinations and number of amino acids in each chain which determines the resulting protein e.g. muscle, hooves, hormones, coat and tendons. Amino acids in proteins which make up your whole horse can be likened to letters of the alphabet, making words and then sentences. Amino acids make specific proteins which form different parts of your horse.

Amino acids are termed either "essential" or "non-essential".

Essential amino acids are "essential" not because they are more important to life than the others, but because the horse's body does not synthesise them, making it essential to include them in your horse's diet. All the essential amino acids needed to make a particular protein, need to be present in the digestive tract at the same time. If even one is missing or present in only small amounts the resulting protein will be deficient e.g. cracked hooves, muscle wastage, poor milk quality, dull coat and stunted growth to name a few.

Feeding Quality Protein

The challenge in feeding horses is to provide the best quality protein, this is determined by its amino acid profile not its crude protein level.

Quality protein, with all 10 essential amino acids, allows circulating amino acids in the blood, which the horse's body can draw on to synthesise and repair all its bodily tissues and functions. Every chemical reaction that takes place in your horse's body depends on amino acids and the proteins that they build.

The Hanley Formula is a unique blend of Equine Essential amino acids with no fillers or additives. It contains high levels of all 10 equine essential amino acids which are: Arginine, Isoleucine, Leucine, Lysine, Methionine, Phenylalanine, Threonine, Tryptophan and Valine, plus other non-essential amino acids.

Diet Supplementation

By simply top dressing your normal feed with around 100 grams (depending on the horse) of The Hanley Formula you are increasing your horse's overall protein quality and amino acid profile.

The Hanley Formula is an easy to feed supplement which offers owners, breeders, trainers and riders from all equine fields a fully balanced protein source, rich in every essential amino acid.



Arginine - promotes growth through the release of metabolic hormones (insulin and growth hormone). An important constituent of muscle.
A precursor for creatine synthesis.
Accelerates wound and burn healing.

Histidine - necessary for growth. An important constituent of muscle.
Stimulates production of red and white blood cells.
Helps treat arthritis.
Precursor for histamine - an important neurotransmitter.

Isoleucine - One of three essential branched chain amino acids.
Used for muscular energy production.
Helps treat nervous system degeneration.

Leucine - Branched chain amino acid. Maintains muscle strength during times of physical stress and intensive exercise.
Inhibits breakdown of muscle proteins.
Stimulates insulin release.

Lysine - The most important amino acid for improving growth in young horses.
The major amino acid used as a standard for dietary content in growing horses.
Precursor for carnitine.
Aids in formation of antibodies to control viral infection.
Important in fat metabolism.

Methionine - Regulates cell metabolism and growth. Antioxidant.
Constituent of muscles.
Can assist in keratinisation of hooves - often found as an ingredient in hoof repair supplements e.g. " Farriers formula ".

Phenylalanine - Antidepressant and pain reliever.
Essential for nitrogen balance in tissues.

Threonine - Essential for optimum growth, feed conversion and nitrogen balance in tissues.
Component of digestive enzymes and immune system.

Tryptophan - Regulates growth hormone. May aid in control of nervous behaviour.
Promotes feed intake.
Precursor for production of serotonin (vasoconstrictor and stimulator of muscle construction).

Valine - Branched chain amino acid. Vital for muscle co-ordination.
Metabolised in the muscle - energy metabolism and protein synthesis

Branched Chain Amino Acids (Isoleucine, leucine and valine)
Research studies indicate these are effective in
•    Reducing lactic acid build-up
•    Improving recovery
•    Reducing muscle breakdown

References from Massey University:
•    Feeding Horses in Australia - 1999 Rural industry Research and development Corporation
•    Feeding to Win - 1995 Equine Nutrition Research America
•    Journal of Animal Science - 2005 83:2783-2788 "Amino Acid supplementation improves muscle mass in young and aged horses "
•    Equine Clinical Nutrition - feeding and care - Lon. D. Lewis



Dogroll Small


Hanley Supplements are also proud to introduce Essentials, the first dog roll with added amino acid concentrate specially formulated for dogs, containing all the essential building blocks for healthy skin, hair, bones and muscle.

Essentials is made from the highest quality ingredients and contains no fillers.  Find out more on our website