Tertiary Butyl Hydroquinone (TBHQ) - Feed Ingredient

Tertiary Butyl Hydroquinone (TBHQ) is a synthetic antioxidant derived from hydroquinone, with a tertiary butyl group added to increase its stability and effectiveness. It is commonly used in the food and feed industries to prevent oxidative rancidity in fats and oils, thereby extending shelf life and preserving product quality.

In animal feed formulations, including those for horses, TBHQ may be added to stabilize fat-containing ingredients such as vegetable oils, fish oil, or fat-soluble vitamins. Its primary function is to protect these components from degradation due to exposure to heat, light, or oxygen during processing and storage. TBHQ is used in very small concentrations, typically measured in parts per million (ppm), and is regulated for safety in feed applications.

The following equine feeds, supplements and products contain Tertiary Butyl Hydroquinone (TBHQ) 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
Dark Horse Nu-Image	Select The Best	499899		Pelleted	37.78%	20%	13.89%	17.36%	--	4.02 mcal/kg	--	--	--	--	0.07%	0.04%	0.1 ppm	--	3915.56 ppm	1957.78 ppm	--	98 ppm	--
Fertility EQ	Equi-lete	1056808	--	--	16.7%	27.8%	18.8%	28.8%	--	4.72 mcal/kg	--	--	--	--	--	--	--	--	1777.8 ppm	611.1 ppm	--	--	1959.7 KIU
Horseshoer's Secret Concentrate	Farnam	401615		Pelleted	21.74%	2.72%	16.3%	20.38%	--	3.37 mcal/kg	10.5%	--	--	--	--	--	--	--	3067.39 ppm	767.39 ppm	4.78 ppm	134.8 ppm	3834.12 KIU
HylaLUBE Pellets	Select The Best	499891		Pelleted	--	--	5.5%	0%	--	--	0%	0.61%	9.02%	0.07%	--	0.14%	--	11183.3 ppm	5820.1 ppm	1552.1 ppm	35.2 ppm	6.05 ppm	8250 KIU
Legacy 16% Mare & Foal Ration	Co-op	401633		--	17.78%	6.67%	13.9%	17.4%	26.6%	3.46 mcal/kg	5.62%	1.11%	0.67%	--	--	--	--	--	222.22 ppm	72.22 ppm	0.72 ppm	2.45 ppm	428.68 KIU
Legacy Pellets	Select The Best	499892		Pelleted	14.3%	19.8%	11.69%	0%	--	3.76 mcal/kg	0%	1.65%	1.65%	--	--	--	--	--	--	--	--	--	18565.24 KIU
Nu-Hoof Accelerator	Select the Best	430390		--	40%	13%	33.75%	43.75%	--	0.15 mcal/kg	7.5%	--	--	--	--	1%	--	--	4352 ppm	1521 ppm	--	239.8 ppm	5940 KIU
Nu-Hoof Maximizer	Select The Best	499898		Powdered	42.11%	13.68%	29.92%	34.92%	--	3.35 mcal/kg	27.5%	--	--	--	--	0.21%	0.32 ppm	--	14621 ppm	1462.1 ppm	--	1754.39 ppm	--
Nu-Image	Select the Best	408525		Powdered	34%	18%	13.75%	23.75%	--	3.62 mcal/kg	5.88%	--	--	--	--	--	--	--	3000 ppm	--	--	44.09 ppm	--
Nu-Image ClariFly	Select The Best	1022746	--	--	37.8%	20%	12.5%	35%	--	3.89 mcal/kg	5.9%	--	--	--	--	--	--	--	3333.3 ppm	--	--	49 ppm	--
Nu-Image PLATINUM	Select The Best	499900		Pelleted	24.4%	24.2%	18.8%	28.8%	--	4.03 mcal/kg	--	--	--	--	--	--	--	--	3919.3 ppm	1959.7 ppm	--	97.8 ppm	--
Nu-Weight	Select The Best	499896		Pelleted	7.8%	72.2%	6.88%	18.97%	--	8.2 mcal/kg	0%	0.8%	1.1%	--	--	--	--	--	--	--	--	--	--
Select Alfalfa	Select The Best	499887		Pelleted	12.2%	5.6%	13.06%	36.03%	--	3.13 mcal/kg	9.1%	0.7%	6.4%	3.2%	--	5.9%	3 ppm	--	4888.9 ppm	1498.9 ppm	13.3 ppm	--	6516.9 KIU
Select Grass	Select The Best	499886		Pelleted	12.2%	5.6%	15.81%	43.62%	--	2.97 mcal/kg	10%	6.5%	2.6%	3.2%	--	5.9%	3 ppm	--	4888.9 ppm	1498.9 ppm	13.3 ppm	--	6516.9 KIU
Triple Play	Equi-lete	1058335	--	--	17.2%	13.3%	12.5%	40%	--	2.74 mcal/kg	3.4%	8.8%	1.4%	2.2%	0.9%	--	--	1888.9 ppm	2500 ppm	600 ppm	27.8 ppm	102.9 ppm	2939.5 KIU
Wheat Germ Oil Plus	Select The Best	499897		Liquid	--	99%	--	--	--	9.5 mcal/kg	--	--	--	--	--	--	--	--	--	--	--	--	3563 KIU

Feeds, Supplements & Products

Dark Horse Nu-Image (Select The Best)

Coat Quality

Mineral Balance

Omega 3-6-9

Vitamins

Dark Horse Nu-Image by Select The Best is a supplement for black, bay and brown horses which contains omega-3, omega-6 and omega-9 fatty acids, amino acids, and essential B-vitamins, including biotin and pyridoxine.

Fertility EQ (Equi-lete)

Broodmare

Health

Nutrients

Stallion

Fertility EQ by Equi-lete is supplement containing omega-3 fatty acids, it is intended to support reproductive health in stallions and mares.

Reproductive Supplement Commercial Feeds & Supplements Supplement

Horseshoer’s Secret Concentrate (Farnam)

Hoof Health

Mineral Balance

Nutrients

Omega 3-6-9

Horseshoer's Secret Concentrate is a pelleted hoof supplement that provides 25 mg of biotin per 2 oz serving. It also provides minerals, amino acids, yeast cultures and essential fatty acids.

Commercial Feeds & Supplements Hoof Supplement Vitamins

HylaLUBE Pellets (Select The Best)

Exercise

Joints

Recovery

Senior

HylaLUBE Pellets by Select The Best is a pelleted joint supplement that provides vitamins and minerals for joint fluid, healthy cartilage, and is made with rice bran for palatability.

Feed Additives Commercial Feeds & Supplements Joint Supplement Minerals Vitamins

Legacy 16% Mare & Foal Ration (CO-OP)

Foal

Growth

Lactation

Mare

Legacy 16% Mare & Foal Ration is a higher-protein feed intended for broodmares and growing foals. These horses benefit from higher levels of amino acids in the diet.

Commercial Feeds & Supplements Feeds

Legacy Pellets (Select The Best)

Antioxidant

Bone Health

Joints

Performance

Legacy Pellets by Select The Best is a pelleted supplement that intends to provide support for joints, connective tissue and soft tissue. It contains glucosamine HCI, MSM, chondroitin sulphate, and yucca.

Feed Additives Commercial Feeds & Supplements Joint Supplement Minerals Vitamins

Nu-Hoof Accelerator (Select the Best)

Amino Acid

Hoof Health

Mineral Balance

Vitamins

Nu-Hoof Accelerator from Select the Best is a hoof supplement that contains biotin, B-vitamins, zinc, copper, and the amino acids lysine and methionine.

Feed Additives Commercial Feeds & Supplements Hoof Supplement

Nu-Hoof Maximizer (Select The Best)

Amino Acid

Hoof Health

Organic Trace Minerals

Vitamins

Nu-Hoof Maximizer by Select The Best is a powdered supplement that provides nutrients important to hoof quality. These include biotin, methionine, copper and zinc.

Feed Additives Commercial Feeds & Supplements Hoof Supplement Minerals Vitamins

Nu-Image (Select the Best)

Coat Quality

Mineral Balance

Omega 3-6-9

Skin + Hair

Nu-Image is a coat conditioner equine supplement providing Omega-3 and Omega-6 fatty acids with added zinc, biotin, and amino acids. It is intended to support coat, mane, and tail growth.

Feed Additives Skin & Coat Supplement Minerals Vitamins

Nu-Image ClariFly (Select The Best)

Coat Quality

Competition Horses

Gut Health

Skin + Hair

Nu-Image ClariFly by Select The Best is a coat, mane and tail supplement containing ClariFly. It is intended to improve coat quality in horses, and minimize fly development in the manure of treated horses.

Skin & Coat Supplement Supplement

Nu-Image PLATINUM (Select The Best)

Coat Quality

Fat

Omega 3-6-9

Skin + Hair

Nu-Image PLATINUM by Select The Best is a coat supplement for performance horses that contains omega-3, 6 and 9 fatty acids, amino acids, B-vitamins, copper and zinc.

Feed Additives Commercial Feeds & Supplements Skin & Coat Supplement Fat Minerals Vitamins

Nu-Weight (Select The Best)

Digestion

Fat

Probiotic

Weight Issues

Nu-Weight by Select The Best is a pelleted supplement that is high in fat. Nu - Weight is intended for weight gain in horses who struggle with body condition.

Weight Gain Supplement Feed Additives Commercial Feeds & Supplements Fat Probiotics

Select Alfalfa (Select The Best)

Amino Acid

Mineral Balance

Vitamins

Yeast

Select Alfalfa by Select The Best is a pelleted supplement ration balancer that intends to provide the vitamins, minerals, amino acids, and digestive support to balance diets mainly comprised of alfalfa hay.

Feed Additives Commercial Feeds & Supplements Ration Balancer Supplement Hay Minerals Vitamins

Select Grass (Select The Best)

Digestion

Mineral Balance

Vitamins

Yeast

Select Grass by Select The Best is a pelleted ration balancer that intends to provide the vitamins, minerals, amino acids, and digestive support to balance diets mainly comprised of grass.

Feed Additives Commercial Feeds & Supplements Ration Balancer Fiber Hay Minerals Vitamins

Triple Play (Equi-lete)

Gut Health

Health

Performance

Weight Issues

Triple Play by Equi-lete is a vitamin and mineral supplement intended to support gastric health, performance and body condition in hard keepers, performance horses and breeding stock.

Mineral Supplements Supplement Vitamin Supplements

Wheat Germ Oil Plus (Select The Best)

Coat Quality

Energy

Fat

Stamina

Wheat Germ Oil Plus from Select The Best is a liquid supplement for horses which provides a source of omega-3 and omega-6 fatty acids to support healthy skin and coat. Wheat Germ Oil Plus is intended for horses needing extra calories.

Feed Additives Commercial Feeds & Supplements Supplement Fat Vitamins