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Muscle Builder

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Muscle Builder is recommended for...

  • Muscle Development

  •  Performance & Training

  • Post-Exercise Recovery

  •  Lean Muscle Support

  • Senior Horses

  • Rehab & Recovery

For Horses

Build lean muscle, support strength, and promote healthy recovery with a specially formulated blend of essential amino acids and antioxidants. Muscle Builder helps horses maintain topline, stay strong through training cycles, and recover comfortably after work – without adding unwanted bulk or calories. Ideal for horses in training, competition, or rebuilding strength.

What Muscle Builder does

Builds Strong, Healthy Muscle

Supports muscle growth and topline with essential amino acids.

Supports Lean Muscle, Not Extra Fat

Builds lean muscle without fattening ingredients.

Speeds Recovery After Exercise

Promotes faster recovery and reduces next-day soreness.

Improves Muscle Performance

Enhances circulation and muscle function to help horses improve performance and stamina.

Comprehensive Amino Acid Profile

A complete blend of 9 amino acids, including BCAAs, for complete muscle support.

Vitamin E & Selenium

Formulated with antioxidant nutrients for a premium, science-driven nutritional profile rarely found in muscle formulas.

No Fillers or Unnecessary Ingredients

No sugars, fats, or calorie-loading fillers – every ingredient has a functional purpose.

USEF & FEI Compliant

Safe to use in all levels of showing.

Keep Them Stronger Longer

Whether your horse is competing, conditioning, or coming back from time off, maintaining muscle takes more than feed alone. Support their strength and topline with a formula built to nourish muscle health from every angle.

Mix 1 level scoop (5.9 g) with feed, once daily.

For the average 1100 lbs horse.

For best results, use consistently over time. Or as directed by your veterinarian.

Active Ingredients:

L-Lysine HCl (1250 mg), Arginine HCl (1250 mg), Ornithine HCl (750 mg), Vitamin E (700 mg), Glycine (500 mg), L-Leucine (400 mg), L-Isoleucine (400 mg), L-Valine (400 mg), L-Glutamine (250 mg), Selenium (2 mg)

Other Ingredients: Natural Flavor (Monk Fruit Extract)

Store in a cool, dry place.

Delivery within 2-5 business days. Free USPS shipping for orders over $69.

Free expedited FEDEX shipping for orders over $200.

$5.99 shipping for orders under $69.

Read our full shipping policy here.

Our Promise

Give us 30 days to feel the difference! Satisfaction Guaranteed for first time customers.

If you are not 100% satisfied, reach out to us at hello@summitanimalhealth.com or (352) 559-3999.

Read our returns policy here.

Trusted delivery

For Horses

Build lean muscle, support strength, and promote healthy recovery with a specially formulated blend of essential amino acids and antioxidants. Muscle Builder helps horses maintain topline, stay strong through training cycles, and recover comfortably after work – without adding unwanted bulk or calories. Ideal for horses in training, competition, or rebuilding strength.

What Muscle Builder does

Builds Strong, Healthy Muscle

Supports muscle growth and topline with essential amino acids.

Supports Lean Muscle, Not Extra Fat

Builds lean muscle without fattening ingredients.

Speeds Recovery After Exercise

Promotes faster recovery and reduces next-day soreness.

Improves Muscle Performance

Enhances circulation and muscle function to help horses improve performance and stamina.

Comprehensive Amino Acid Profile

A complete blend of 9 amino acids, including BCAAs, for complete muscle support.

Vitamin E & Selenium

Formulated with antioxidant nutrients for a premium, science-driven nutritional profile rarely found in muscle formulas.

No Fillers or Unnecessary Ingredients

No sugars, fats, or calorie-loading fillers – every ingredient has a functional purpose.

USEF & FEI Compliant

Safe to use in all levels of showing.

Keep Them Stronger Longer

Whether your horse is competing, conditioning, or coming back from time off, maintaining muscle takes more than feed alone. Support their strength and topline with a formula built to nourish muscle health from every angle.

Mix 1 level scoop (5.9 g) with feed, once daily.

For the average 1100 lbs horse.

For best results, use consistently over time. Or as directed by your veterinarian.

Active Ingredients:

L-Lysine HCl (1250 mg), Arginine HCl (1250 mg), Ornithine HCl (750 mg), Vitamin E (700 mg), Glycine (500 mg), L-Leucine (400 mg), L-Isoleucine (400 mg), L-Valine (400 mg), L-Glutamine (250 mg), Selenium (2 mg)

Other Ingredients: Natural Flavor (Monk Fruit Extract)

Store in a cool, dry place.

Delivery within 2-5 business days. Free USPS shipping for orders over $69.

Free expedited FEDEX shipping for orders over $200.

$5.99 shipping for orders under $69.

Read our full shipping policy here.

Our Promise

Give us 30 days to feel the difference! Satisfaction Guaranteed for first time customers.

If you are not 100% satisfied, reach out to us at hello@summitanimalhealth.com or (352) 559-3999.

Read our returns policy here.

Trusted delivery

Key Ingredients

Thoughtfully balanced amino acids and antioxidants create a complete muscle-support system, helping horses build, maintain, and protect muscle more effectively than single-ingredient formulas.

L-Lysine, Leucine, Isoleucine, & Valine

Provide the core building blocks for muscle protein synthesis, helping horses maintain strong, healthy muscle tone and topline.

Glutamine, Arginine, & Ornithine

Work together to aid post-exercise muscle repair and help reduce fatigue and stiffness after training or competition.

Arginine & Ornithine

Also help support nitric oxide production, which promotes healthy blood flow and improves nutrient delivery during work and recovery.

Vitamin E & Selenium

A high-potency antioxidant pair that supports muscle tissue health, helps protect cells from free radicals, and reduces exercise-related oxidative stress.

Glycine & Glutamine

Support gut integrity and immune function, helping horses stay healthy and balanced during demanding training cycles.

Keep Them Strong

By giving your horse daily muscle support, you’re helping them maintain strength, balance, and readiness for whatever work lies ahead. Keep them strong, capable, and confident year-round.

Maintains Muscle Year-Round

Keeps muscle tone and topline supported through all seasons and training levels.

Prevent Muscle Loss in Downtime

Supports horses during breaks, injury recovery, or reduced workload.

Ideal for Senior Horses

Aging horses naturally lose muscle, daily support helps maintain strength and mobility.

Supports Consistent Performance

Helps horses stay strong, balanced, and ready to work with steady amino acid intake.

Safe for Long-Term, Daily Use

No cycling needed, formulated for continuous support without sugars, fats, or calorie-loading fillers.

Subscribe & SAVE

Unbeatable Savings

Enjoy up to 25% discount every subscription order!

Convenience

Delivered to your doorstep with fast, reliable shipping!  Never run out or miss a dose of our natural and effective products.

Endless Support 

Ensuring your animals receive consistent care for lasting results.

Earn & Redeem

Get reward points with every order! Use them on upcoming subscription orders.

Frequently Asked Questions

  • How long does Muscle Builder take to see muscle improvement?

    Most horses show improvements in topline, strength, or recovery within 3–4 weeks of consistent daily use, depending on age, fitness level, and workload.

  • Can Muscle Builder help build topline?

    Yes. Muscle Builder works by supplying amino acids needed for muscle protein synthesis, which supports topline development when paired with appropriate exercise.

  • Do I need to change my horse’s feed to use Muscle Builder?

    No. Muscle Builder works with any normal diet. It provides targeted amino acids that traditional feeds may not supply in adequate amounts.

  • Will Muscle Builder make my horse gain weight or get bulky?

    No. Muscle Builder helps develop lean muscles, not fat. Our formula does not add calories and won’t cause unwanted bulk or extra weight.

  • Is Muscle Builder safe for senior horses?

    Yes. In fact, seniors often benefit the most from Muscle Builder since they naturally lose muscle with age and may struggle to maintain topline through diet alone.

  • Can I use Muscle Builder during rehab or time off?

    Yes. Muscle Builder is valuable when a horse is on limited exercise, helping preserve muscle and maintain condition until they return to regular work.

  • Is Muscle Builder safe for competition horses?

    Yes. Muscle Builder contains no prohibited substances and is USEF & FEI compliant.

  • Do I need to feed Muscle Builder year-round?

    Consistency delivers the best results. Daily use of Muscle Builder helps maintain muscle during training, off-season, travel, and time off.