Formula4 Feet

Formula4 Feet is the first non-GM hoof supplement to be made anywhere in the world!

Want the first non-GM hoof supplement ever made for serious hoof support?

Reviewed by Ann Pruitt, InfoHorse.com · Updated May 2026

Hoof Essentials horse hoof supplement front label showing ingredients from Emerald Valley Equine

Formula4 Feet

Formula4Feet, by Emerald Valley Equine a division of Equiglobal USA Inc.
Formula4 Feet is the first non-GM hoof supplement to be made anywhere in the world!

About Emerald Valley

Emerald Valley brings the unparalleled natural solutions of Britain's Equiglobal Ltd to North America, recognized as a world leader in truly effective herbal products. We are dedicated to helping you achieve consistent positive outcomes for the animals in your care. Equiglobal Ltd's products are manufactured in a medicines licensed facility and based on purified water - an important difference in the quality, effectiveness, safety and reliability of our products. In addition, all products are free of alcohol and solvents, as well as herbicide and pesticide residue.

Formula4 Feet

Equi Life Ltd, the distribution arm of The Laminitis Clinic, has launched a ‘New Generation’ supplement, Formula4Feet, providing unique benefits for both horses with poor hoof horn quality and those at risk of laminitis. Robert Eustace Frcvs, Director of the Laminitis Clinic, developed Formula4Feet in collaboration with Dr. David Frape, the country’s leading equine nutritionist. Mr. Eustace is increasingly disturbed by the insidious increase in GM ingredients in horse feeds. He takes the view that the consequences of feeding GM ingredients are unknown and that until extensive research is undertaken, to prove safety both to animals and the environment, it is prudent to avoid such materials.

What Are The Ingredients of Formula4 Feet?

Formula4 Feet provides over 65 micronutrients, in a highly palatable pellet. Due to it’s comprehensive formulation Formula4 Feet is an excellent general supplement to help keep your horse in tiptop health. Formula4 Feet provides a daily dose of 20mg biotin for a 450 kg horse. Most studies on the effects on hoof horn by supplementing with biotin, indicate that 20mg daily is necessary to achieve consistent improvement. Formula4 Feet provides over 3 grams of calcium per day balanced with magnesium and phosphorus. Calcium has been shown to be important in inter-squame attachment in hoof horn. Formula4 Feet provides zinc as both organic and inorganic forms, providing optimal availability, yet allowing the horse to retain intestinal selectivity during absorption. Zinc is important for correct hoof horn growth; deficiency results in parakeratosis.

What Makes Formula4 Feet Different Than The Competition?

Formula4 Feet is the first non-GM hoof supplement to be made anywhere in the world. It is manufactured in the UK in a drug free, Soil Association and Ukasta approved facility. Formula4 Feet has gained approval by the Vegetarian Society due to there being no ingredients of animal or mollusk origin and to the ethical production and development policies, which Equi Life employs. Each batch of Formula4 Feet is tested free of substances listed in the Common Feed Contaminants Screen, before it is offered for sale.

Products including these substances would result in a positive dope test under FEI and Jockey Club rules.

Testing is performed at the world’s leading equine forensic laboratory.

Formula4 Feet has been subjected to independent research at the University of Berlin, the world-renowned keratin institute.

What Customers Say About Formula4 Feet?

Our pony has had severe hoof problems in the past but since using Formula4 Feet, alongside a strict management routine, he has been amazing and now bouncing around all over the place. We are very pleased with the way our pony is now he is completely different. I will certainly be keeping him on Formula4 Feet.
Mrs Jenny Pike, Lincolnshire

I have just ordered my second tub of Formula4 Feet. At long last here is a product that really works and I have tried loads of others! My Icelandic horse had recurrent hoof problems. His hoof quality has already improved after only one tub of this supplement and the farrier is now finding it a lot easier to put his shoes on.
Many, many thanks Julie Lennox.

Order Your Formula4 Feet Today!

Give your horse the complete nutrition it needs to prevent and treat its hoof problems. Don’t let your horse suffer anymore! Call and order today!

What made Formula4 Feet a landmark hoof supplement?

Formula4 Feet was developed at The Laminitis Clinic by Dr. Robert Eustace and built its reputation as one of the most complete hoof and laminitis supplements ever offered through Emerald Valley Equine. It earned its place in history as the world's first non-GM hoof supplement, manufactured in the UK in a drug-free, Ufas-accredited facility under strict batch control. Rather than relying on biotin alone, it delivered a research-backed balance of nutrients proven essential for both horn growth rate and horn quality. Emerald Valley distributed the EquiLife line across North America for the better part of two decades.

Hoof Essentials horse hoof supplement back label with feeding directions and guaranteed analysis

Who is Emerald Valley Equine?

Emerald Valley brings the natural-health philosophy of Britain's Equiglobal Ltd to North American horse owners, operating under the banner "It's only natural to want the best." The company is a member of the National Animal Supplement Council (NASC) and is certified to display the NASC Seal of Quality, with products made in a licensed facility under strict batch-control and quality guidelines. Beyond hoof care, Emerald Valley's catalog includes the Serenus calmer and a line of leather-care balms and soaps. The company can be reached.

Back of the Emerald Valley Equine Hoof Essentials supplement bag

Inside the formula: biotin, methionine, and a balanced mineral matrix
Formula4 Feet supplied 20 mg of biotin daily for a 450 kg (roughly 1,000 lb) horse, the level research indicates is needed for consistent improvement in hoof horn. It paired that biotin with methionine and cystine, the sulphur-containing amino acids that form the building blocks of strong horn, plus more than 3 grams of calcium per day balanced with magnesium and phosphorus to support inter-squame attachment in the hoof wall. Zinc was provided in both inorganic and chelated (amino-acid-bound) forms for optimal bioavailability while preserving the horse's natural intestinal selectivity. The alfalfa-based formula notably contained no selenium, avoiding the risk of selenium excess in regions where forage is already adequate.

Emerald Valley Equine Serenus 1 liter horse calmer supplement bottle

How the supplement worked from the inside out

The hoof grows from the coronary band down, so visible horn quality reflects nutrition supplied months earlier. Formula4 Feet addressed nutritional deficiency by feeding the right balance of micro-nutrients, vitamins (including A, C, B6, choline and inositol) and amino acids (lysine, threonine) needed for healthy keratin formation. The same nutrients that build sound hoof horn also support skin, hair coat and metabolism, so many owners reported coat and condition benefits alongside hoof improvement. Because new growth takes time, the supplement was fed consistently over a full hoof-growth cycle to see the wall, sole and white line strengthen.

Important: Formula4 Feet has been discontinued

Dr. Robert Eustace has retired and closed the EquiLife company, so the original Formula4 Feet is no longer produced. Emerald Valley Equine has worked alongside Dr. Tom Shurlock to develop a successor vitamin and mineral hoof supplement, Hoof Essentials, described as "a holistic approach to hoof health" that supports all areas of the hoof from the inside out. Hoof Essentials carries biotin, vitamins A, D and E, B vitamins, zinc, copper, omega-3 fatty acids and key amino acids (methionine, lysine, arginine, proline, glycine), with turmeric and apple cider vinegar added for antioxidant support.

Where to buy the current hoof supplement

The Hoof Essentials replacement is sold directly at emeraldvalleyequine.com, priced from $79.95 to $199.95 depending on size. A single 15 lb bag is a roughly six-week supply, and a 45 lb bag offers about an 18-week supply for longer-term feeding. Owners with questions about transitioning from Formula4 Feet, or about which hoof formula best fits their horse, can call Emerald Valley Equine.

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The Solution Section (FAQ)

What does Formula4 Feet offer?

Formula4 Feet provides over 65 micronutrients, in a highly palatable pellet. Formula4 Feet provides a daily dose of 20mg biotin for a 450 kg horse. Formula4 Feet provides over 3 grams of calcium per day balanced with magnesium and phosphorus.

How do you use Formula4 Feet?

Each batch of Formula4 Feet is tested free of substances listed in the Common Feed Contaminants Screen, before it is offered for sale. Give your horse the complete nutrition it needs to prevent and treat its hoof problems.

How did Formula4 Feet get started?

Robert Eustace FRCVS, Director of the Laminitis Clinic, developed Formula4Feet in collaboration with Dr. Formula4 Feet provides over 65 micronutrients, in a highly palatable pellet. Formula4 Feet provides a daily dose of 20mg biotin for a 450 kg horse.

What was Formula4 Feet?

Formula4 Feet was a comprehensive equine hoof supplement distributed in North America by Emerald Valley Equine under the EquiLife brand. It was developed at The Laminitis Clinic by Dr. Robert Eustace and marketed as one of the most advanced and complete hoof and laminitis supplements available. It delivered a research-backed balance of biotin, amino acids, minerals and vitamins to support healthy hoof horn growth.

Is Formula4 Feet still available?

No. The original Formula4 Feet has been discontinued. Dr. Robert Eustace retired and closed the EquiLife company, ending production of the supplement. Emerald Valley Equine has since worked with Dr. Tom Shurlock to develop a successor product called Hoof Essentials.

What is the replacement for Formula4 Feet?

Emerald Valley Equine now offers Hoof Essentials, a vitamin and mineral hoof supplement developed alongside Dr. Tom Shurlock. It is described as a holistic approach to hoof health that supports all areas of the hoof from the inside out, and it carries biotin, vitamins A, D and E, B vitamins, zinc, copper, omega-3 fatty acids, key amino acids, plus turmeric and apple cider vinegar for antioxidant support.

Who developed Formula4 Feet?

Formula4 Feet was developed at The Laminitis Clinic by Dr. Robert Eustace, a veterinarian known for laminitis research and treatment. Research conducted at the clinic that was not published for commercially sensitive reasons was incorporated into the formula. The product was manufactured in the UK and brought to North America by Emerald Valley Equine.

How much biotin did Formula4 Feet contain?

Formula4 Feet supplied 20 mg of biotin per day for a 450 kg (roughly 1,000 lb) horse. Most studies on the effects of biotin on hoof horn indicate that 20 mg daily is the level needed to achieve consistent improvement, so the formula was designed to meet that research threshold rather than offering a token amount.

Why did Formula4 Feet contain no selenium?

Formula4 Feet was formulated without selenium intentionally. Many horses already receive adequate selenium from forage, fortified feeds or other supplements, and excess selenium can be harmful. Leaving it out of Formula4 Feet reduced the risk of inadvertently stacking selenium and causing toxicity.

What amino acids were in Formula4 Feet?

The supplement provided sulphur-containing amino acids methionine and cystine, which form the building blocks of strong hoof horn. It also included lysine and threonine. Methionine in particular is essential because it supplies the sulphur needed to create the cross-linked keratin structure that makes horn tough and resilient.

What minerals did Formula4 Feet provide?

Formula4 Feet delivered more than 3 grams of calcium per day, balanced with magnesium and phosphorus, because calcium is important for inter-squame attachment in hoof horn. It also supplied zinc in both inorganic and chelated (amino-acid-bound) forms for optimal bioavailability, along with copper, which is essential for proper horn and skin growth.

Why was Formula4 Feet described as non-GM?

Formula4 Feet was promoted as the world's first non-GM hoof supplement, meaning its ingredients were sourced to avoid genetically modified material. It was manufactured in the UK in a drug-free, UFAS-accredited facility under strict batch control, appealing to owners who wanted a natural, traceable product for their horses.

What was the base ingredient of Formula4 Feet?

The formula used an alfalfa meal base combined with yeast culture and plant proteins such as faba bean and soybeans, then fortified with vitamins and minerals. The alfalfa base provided a palatable, fiber-rich carrier and natural calcium, with the targeted micro-nutrients added on top for hoof health.

How long does it take to see results from a hoof supplement?

Hoof horn grows slowly from the coronary band downward, so visible improvement reflects nutrition supplied months earlier. A full hoof typically takes the better part of a year to grow out, which is why hoof supplements like Formula4 Feet and its successor are fed consistently over a complete growth cycle rather than expecting overnight change.

Did Formula4 Feet help with anything besides hooves?

Yes. Because the nutrients that build sound hoof horn (biotin, sulphur amino acids, zinc, copper and B-vitamins) also support skin and coat, many owners reported improvements in hair coat, skin condition and overall metabolism while feeding the supplement. The formula was marketed as supporting healthy hooves, skin, hair coat and metabolism together.

Is Emerald Valley Equine a reputable company?

Emerald Valley Equine is a member of the National Animal Supplement Council (NASC) and is certified to display the NASC Seal of Quality. Its products are manufactured in a licensed facility under strict batch-control and quality guidelines. The company brings the natural-health products of Britain's Equiglobal Ltd to the North American market.

How much does the current Hoof Essentials supplement cost?

Hoof Essentials is priced from $79.95 to $199.95 depending on the size selected. A single 15 lb bag is roughly a six-week supply, while a 45 lb bag offers about an 18-week supply for owners feeding multiple horses or planning longer-term hoof support.

How do I contact Emerald Valley Equine?

You can reach Emerald Valley Equine by phone at 1-888-638-8262 or shop online at emeraldvalleyequine.com. The team can answer questions about transitioning from the discontinued Formula4 Feet to Hoof Essentials and help you choose the right hoof formula for your horse.

What other products does Emerald Valley Equine make?

Beyond hoof supplements, Emerald Valley Equine offers Serenus, a liquid calmer for horses, as well as leather-care products including a leather balm and a tea tree oil leather soap for cleaning and conditioning tack. The company focuses on natural equine health solutions under the philosophy that it's only natural to want the best.

Was Formula4 Feet used for horses with laminitis?

Yes. The formula originated at The Laminitis Clinic and was positioned as a hoof and laminitis support supplement. By supplying the balanced micro-nutrients research shows are needed for strong horn and a healthy hoof wall, it was used to support horses prone to or recovering from hoof issues, though it was a nutritional supplement rather than a medical treatment.