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Amino Acids - Feed Ingredient

Amino acids are the fundamental components of proteins and play essential roles in muscle development, enzyme activity, immune function, and overall metabolism in horses. They are classified as essential or non-essential based on whether they must be obtained from the diet or can be synthesized by the horse’s body. Essential amino acids, such as lysine, methionine, and threonine, must be provided in sufficient amounts to support protein synthesis and physiological functions.

In equine nutrition, amino acids are included in feeds and supplements to improve protein quality and ensure balanced nutrient intake. Lysine is considered the first limiting amino acid in horse diets, meaning its deficiency can restrict protein utilization even if total protein intake appears adequate. Methionine, another essential amino acid, is critical for hoof integrity, muscle maintenance, and metabolic processes but is often limited in plant-based protein sources. Proper amino acid balance is particularly important for young, growing horses, performance horses, and those on forage-based diets with lower-quality protein sources.

The following equine feeds, supplements and products contain Amino Acids as an ingredient.

Feed Name	Brand	ID	Availability	Format	Protein	Fat	ADF	NDF	NSC	DE	Lysine	Calcium	Phosphorus	Magnesium	Potassium	Sodium	Chloride	Iron	Zinc	Copper	Selenium	Biotin	Vitamin E
BozMerix Balancer Maintenance Diet	Hestevard	1003171	--	Pelleted	17.8%	7.8%	24.4%	34.4%	12.8%	2.88 mcal/kg	0.81%	2.7%	1.3%	--	--	0.3%	--	388.9 ppm	388.9 ppm	122.2 ppm	0.6 ppm	1.4 ppm	1192 KIU
Breed & Grow	Dunstan	990515	--	Pelleted	16.67%	5.5%	18.8%	28.8%	--	3.11 mcal/kg	6.67%	1.67%	0.83%	0.28%	1.33%	0.44%	0.67 ppm	222.22 ppm	155.56 ppm	55.56 ppm	0.56 ppm	0.25 ppm	372.5 KIU
Caliber Complete Horse Ration	Co-op	401531		--	13.33%	2.22%	22%	--	--	2.03 mcal/kg	5.09%	0.83%	0.5%	0.33%	1%	0.44%	--	--	333.33 ppm	94.44 ppm	0.33 ppm	8.22 ppm	333.33 KIU
Caliber Mare & Foal Ration	Co-op	401534	--	--	17.78%	6.11%	16.5%	--	--	2.35 mcal/kg	5.62%	1.11%	0.83%	0.33%	0.89%	0.44%	--	--	366.67 ppm	66.67 ppm	0.67 ppm	6.22 ppm	377.78 KIU
Caliber Performance Horse Mineral	Coop Agro	736903	--	--	100%	--	--	--	--	1 mcal/kg	1.7%	10.5%	5.8%	2.1%	0.7%	4.4%	--	2421.1 ppm	4421.1 ppm	842.1 ppm	10.5 ppm	60 ppm	5263.2 KIU
Caliber Performance Horse Ration	Co-op	401533		--	15.56%	5.56%	24.75%	--	--	3.54 mcal/kg	6.07%	1.11%	0.67%	0.33%	0.78%	0.67%	--	--	305.56 ppm	83.33 ppm	0.67 ppm	6 ppm	444.44 KIU
Caliber Senior & Special Care Horse Ration	Co-op	401532		Pelleted	15.56%	7.78%	24.75%	--	--	3.11 mcal/kg	5.14%	1.11%	0.67%	0.33%	1.33%	0.39%	--	--	488.89 ppm	83.33 ppm	0.55 ppm	6.22 ppm	555.56 KIU
Caliber Working Horse Ration	CO-OP	401301		--	17.78%	7.78%	16.26%	34%	--	3 mcal/kg	9.37%	2.17%	1.44%	0.33%	1.33%	0.44%	--	--	555.56 ppm	111.11 ppm	1.5 ppm	12.22 ppm	1111 KIU
Cool Crunch	Pegasus	529793		--	17.8%	2.2%	25%	31.3%	--	2.89 mcal/kg	--	1.1%	0.78%	--	--	0.39%	--	--	--	--	0.67 ppm	--	166.7 KIU
Cool-Care	Beyond-Soy	1000326	--	Mash	24.4%	6.7%	18.3%	16.1%	5.6%	3.37 mcal/kg	37.3%	2.7%	1.4%	0.7%	1.4%	1.2%	--	991.1 ppm	382.2 ppm	150 ppm	1.6 ppm	0.57 ppm	228.9 KIU
Equibalance	Pegasus	529759		--	19.4%	8.9%	12.5%	40%	--	3.58 mcal/kg	5.1%	1.65%	0.66%	0.33%	--	0.66%	0.99 ppm	355.6 ppm	266.7 ppm	94.4 ppm	1.65 ppm	0.56 ppm	555.6 KIU
EquiForce E+	Havens Horsefeed	430471	--	--	100%	--	--	--	--	--	1%	--	--	4.44%	--	--	--	--	--	--	25 ppm	--	82777.4 KIU
Equilibra Feed Balancer	GWF Nutrition	529957		Pelleted	18.89%	9.44%	16.5%	26.5%	18.33%	3.3 mcal/kg	4.71%	1.56%	0.56%	0.44%	--	0.39%	--	55.56 ppm	344.44 ppm	111.11 ppm	1.11 ppm	1.33 ppm	1316.75 KIU
Equine Omega Complete	O3 Animal Health	71735	--	--	0.11%	98.06%	--	--	--	10.87 mcal/kg	--	0.01%	0.01%	--	--	--	--	--	--	--	--	--	11697.33 KIU
Fibre Balancer	Dunstan	992901	--	--	20%	4%	14.8%	47.2%	--	2.98 mcal/kg	6.67%	1.67%	1%	0.44%	1.56%	0.44%	0.67 ppm	266.67 ppm	266.67 ppm	100 ppm	1.22 ppm	0.22 ppm	413.89 KIU
Fibre Grow	Dunstan	992907	--	Pelleted	16.67%	5.6%	19.1%	29.1%	--	3.1 mcal/kg	6.67%	1.67%	0.83%	0.28%	1.33%	0.44%	0.67 ppm	222.22 ppm	155.56 ppm	55.56 ppm	0.56 ppm	0.28 ppm	413.89 KIU
Fibre Plus	Dunstan	992920	--	Pelleted	20%	4%	14.8%	47.2%	--	3.1 mcal/kg	6.67%	1.67%	1%	0.44%	1.56%	0.44%	0.67 ppm	266.67 ppm	155.56 ppm	55.56 ppm	1 ppm	0.11 ppm	206.94 KIU
Grand Slam	Equi-lete	1058393	--	Pelleted	32.2%	6.2%	8.9%	14.4%	--	3.48 mcal/kg	6.9%	5%	1%	1.6%	2%	--	--	--	1333.3 ppm	333.3 ppm	8.9 ppm	51.4 ppm	1543.2 KIU
Grass Balancer	Dunstan	992933	--	Textured	15.56%	8.5%	7.4%	23.6%	--	3.46 mcal/kg	6.43%	1.56%	0.67%	0.22%	1.11%	0.44%	0.89 ppm	266.67 ppm	266.67 ppm	100 ppm	2.22 ppm	22.22 ppm	413.89 KIU
Hoof Rx	Complete Equine Performance	529596		Pelleted	--	--	--	--	--	--	0%	--	--	--	--	--	--	--	--	--	--	5411.2 ppm	360749.5 KIU
Lite	Pegasus	951704		--	20%	4.44%	34.72%	44.72%	11.11%	2.97 mcal/kg	5.56%	1.7%	0.6%	0.6%	1.1%	0.4%	0.7 ppm	533.3 ppm	477.8 ppm	172.2 ppm	2.8 ppm	22.2 ppm	17.2 KIU
Mare Mineral	Dunstan	993061	--	Pelleted	12%	6%	6.8%	21.6%	--	2.99 mcal/kg	--	2.22%	1.11%	--	--	--	--	111.11 ppm	711.11 ppm	355.56 ppm	3.33 ppm	--	827.78 KIU
Maxim Low-GI	Dunstan	991072	--	--	16.44%	6.5%	22.5%	32.5%	6.67%	3.1 mcal/kg	4.73%	1.33%	0.67%	0.83%	1.56%	0.67%	0.89 ppm	333.33 ppm	177.78 ppm	77.78 ppm	0.44 ppm	0.1 ppm	372.5 KIU
Muscle Maintenance	GWF Nutrition	529962		Pelleted	38.9%	9.44%	17.88%	27.88%	26.67%	3.04 mcal/kg	4.86%	1.11%	0.22%	0.33%	--	0.22%	--	--	--	--	1.78 ppm	--	41459.37 KIU
Orphan Foal Supplement	Dunstan	997597	--	--	25%	12.5%	3.9%	12.5%	--	4.03 mcal/kg	7.07%	1.33%	0.56%	0.22%	1%	0.33%	0.56 ppm	222.22 ppm	244.44 ppm	94.44 ppm	0.78 ppm	0.22 ppm	405.61 KIU
Peformax	Pegasus	529757		--	14.4%	6.7%	13.8%	44%	--	3.45 mcal/kg	4.61%	0.11%	0.6%	0.33%	--	0.52%	0.79 ppm	255.6 ppm	144.4 ppm	50 ppm	0.9 ppm	0.33 ppm	305.6 KIU
Perfect-Performance Horse Ration	Farmstead Life	469360		Textured	17.8%	4.4%	17.5%	56%	13.8%	2.64 mcal/kg	--	2.2%	1.3%	0.6%	0.7%	1.3%	--	--	--	116.7 ppm	1.3 ppm	8.9 ppm	222.2 KIU
Pro V.M.	Peak Performance Nutrients	469341		Powdered	5.5%	--	--	0%	--	--	33.26%	6.6%	4.02%	2.41%	6.03%	3.92%	6.13 ppm	--	5500 ppm	2512.56 ppm	20.1 ppm	160.8 ppm	40201.01 KIU
Race 13	Capstone Horse Feed	1037790	--	--	14.8%	6.8%	--	--	--	3.53 mcal/kg	4.6%	0.9%	0.6%	0.3%	1%	0.4%	0.7 ppm	227.3 ppm	147.7 ppm	52.3 ppm	0.7 ppm	0.3 ppm	306.8 KIU
Race Mix	Dunstan	1000665	--	--	14%	9%	7.3%	23.4%	--	3.59 mcal/kg	--	1.44%	0.67%	0.28%	1%	0.56%	1 ppm	155.56 ppm	144.44 ppm	55.56 ppm	0.56 ppm	0.11 ppm	206.94 KIU
Studmaster	Pegasus	529758		--	18.9%	4.4%	13.75%	37.93%	--	3.32 mcal/kg	4.7%	1.3%	0.83%	1.1%	--	0.4%	0.7 ppm	255.6 ppm	155.6 ppm	53.3 ppm	1.3 ppm	0.33 ppm	222.2 KIU
Sweet Mix	Dunstan	1001570	--	Textured	12.22%	7.5%	5.6%	18%	--	3.47 mcal/kg	6.57%	1.11%	0.56%	0.44%	1%	0.56%	1 ppm	155.56 ppm	155.56 ppm	55.56 ppm	0.39 ppm	0.11 ppm	223.5 KIU
Sweetmax	Pegasus	529754		--	16.7%	8.9%	15.13%	41.72%	--	3.71 mcal/kg	4.7%	1%	0.61%	0.38%	--	0.4%	0.7 ppm	288.9 ppm	144.4 ppm	50 ppm	0.9 ppm	0.22 ppm	388.9 KIU
VitaStance	Stance EquiTec	867077	--	Powdered	100%	--	--	--	--	0 mcal/kg	5.5%	9.2%	0.07%	2.93%	0.25%	0.41%	--	1010.1 ppm	3526.3 ppm	1178.8 ppm	16.16 ppm	16.46 ppm	9697 KIU
X-Lam Aid	GWF Nutrition	529964		Pelleted	15%	8.9%	19.25%	29.25%	17.22%	2.67 mcal/kg	--	4.9%	0.44%	1%	--	0.11%	--	--	--	--	1.1 ppm	--	766.48 KIU

Feeds, Supplements & Products

AminoTrace+ Vitamin and Mineral Supplement (Mad Barn)

Hoof Health

Metabolic Syndrome

Organic Trace Minerals

Vitamins

AminoTrace+ by Mad Barn is a complete, balanced equine mineral and vitamin supplement designed for horses with metabolic concerns. It is ideal for horses with IR, PPID, or high iron in the diet.

DL-Methionine (Mad Barn)

Amino Acid

Coat Quality

Competition Horses

Ingredient

Methionine is an essential amino acid that is important for maintaining healthy tendons, ligaments, and hooves. Growing horses and horses who are in heavy exercise have a higher demand for methionine and would benefit from supplementation.

Hoof Supplement Joint Supplement Skin & Coat Supplement Amino Acid Supplements

L-Lysine (Mad Barn)

Amino Acid

Immunity

Ingredient

Joints

Lysine is an essential amino acid that is important for forming strong collagen bonds. Lysine is the most commonly deficient amino acid in equine diets.

Amino Acid Supplements Immune Supplement Joint Supplement Muscle Supplement Weight Gain Supplement

Omneity P – Pellets – Vitamin & Mineral Supplement (Mad Barn)

Gut Health

Hoof Health

Mineral Balance

Organic Trace Minerals

Ration Balancer

Omneity Pellets is a balanced mineral and vitamin supplement for horses in a palatable pellet form. It provides 100% organic trace minerals, complete B-vitamin fortification, added Vitamin E, yeast and digestive enzymes.

Commercial Feeds & Supplements Supplement Amino Acid Supplements Bone Supplement Mineral Supplements Reproductive Supplement Vitamin Supplements Minerals Vitamins Organic Minerals

Omneity Premix – Vitamin & Mineral Supplement (Mad Barn)

Hoof Health

Mineral Balance

Organic Trace Minerals

Vitamins

Omneity Premix is a balanced mineral and vitamin supplement for horses providing 100% organic trace minerals, complete B-vitamin fortification, added Vitamin E, yeast, and digestive enzymes.

Commercial Feeds & Supplements Amino Acid Supplements Bone Supplement Mineral Supplements Reproductive Supplement Vitamin Supplements Minerals Organic Minerals Supplement

Three Amigos (Mad Barn)

Amino Acid

Muscle

Protein

Recovery

Three Amigos is an equine essential amino acid supplement containing lysine, methionine, and threonine in a 5:3:2 ratio. These are the three most common limiting amino acids in the horse's diet.

Reproductive Supplement Weight Gain Supplement Muscle Supplement Hoof Supplement Joint Supplement Skin & Coat Supplement Supplement Amino Acid Supplements

Threonine (Mad Barn)

Amino Acid

Gut Health

Muscle

Topline

Threonine is an essential amino acid that is required to be supplied in equine diets as it cannot be synthesized endogenously. Threonine supplementation may improve nutrient absorption.

Hoof Supplement Joint Supplement Gut Supplement Amino Acid Supplements

Visceral+ (Mad Barn)

Digestion

Gut Health

Immunity

Probiotic

Ulcers

Yeast

Visceral+ by Mad Barn is a pelleted supplement to be used for horses with gastric health concerns. It is designed to maintain stomach and hindgut health and to support the immune system.

Supplement Gut Supplement Probiotics