ImmuBiome Lean Muscle
ImmuBiome Lean Muscle
ImmuBiome Lean Muscle
ImmuBiome Lean Muscle
ImmuBiome Lean Muscle
ImmuBiome Lean Muscle
ImmuBiome Lean Muscle

ImmuBiome Lean Muscle

$134.00
Delivery

Add a name and we’ll label this item with it in your cart and on your order. Handy if you feed more than one horse.

Size: 420g

420g
1.2kg
7kg

30-day returns, even opened tubs  Ships from Idaho in 1–3 business days  FEI-friendly / show-safe  Made in USA

Topline and lean muscle support with ImmuBiome Lean Muscle Help your horse build a strong, well-muscled topline with ImmuBiome Lean Muscle. At its core is bovine colostrum, a...

Description

Topline and lean muscle support with ImmuBiome Lean Muscle

Help your horse build a strong, well-muscled topline with ImmuBiome Lean Muscle. At its core is bovine colostrum, a nutrient-dense superfood naturally rich in specialized proteins that support lean muscle development—ideal for horses who need help filling out.

What’s inside

  • Bovine colostrum: Rich in specialized proteins that support healthy muscle growth and maintenance.
  • Reishi mushrooms: Support overall muscle function and a balanced immune system.
  • Probiotics & prebiotics: Beneficial bacteria and gut-supporting nutrients for digestion and nutrient absorption.

Why horse owners choose it

  • Topline support: Supports muscle tone and strength for a balanced physique.
  • Colostrum-first: Built around human-grade bovine colostrum.
  • Easy keeper friendly: No added sugars or molasses.

Key benefits*

  • Supports healthy muscle development and maintenance for a stronger topline.
  • Supports gut health so your horse gets the most from their diet.
  • Provides probiotics, beta-glucans, and colostrum for overall vitality.

Ingredients you can trust
Bovine colostrum, organic Reishi mushroom extracts, and a rich probiotic profile (3 billion CFU per serving), with prebiotics and beta-glucans.

How to use
Mix into damp feed daily, following the label directions. Your veterinarian can help you tailor the amount to your horse’s workload and needs. Pair with quality forage and protein plus consistent work for steady results.

Build strength, support condition
Whether for competition or everyday condition, ImmuBiome Lean Muscle is an easy daily way to support a healthy, well-muscled horse.

*These statements are about nutritional support. ImmuBiome supplements are not intended to diagnose, treat, cure, or prevent any disease. Talk with your veterinarian about your horse’s specific needs.

Ingredients

Per 10 g serving (label amounts where published):

Active / supportAmount
Probiotics3 billion CFU
Core supportBovine colostrum + Reishi (see label)
Full ingredient list

Ingredients
Contains bovine colostrum, organic Ganoderma lucidum (Reishi) mycelium, primordia, fruiting bodies and extracellular compounds, fungi derived polysaccharides,fenugreek, Bifidobacterium bifidum, Bifidobacterium longum, Enterococcus faecium, Enterococcus thermophilus, Lactobacillus acidophilus, Lactobacillus bulgaricus, Lactobacillus casei and Lactobacillus plantarum.

Active Ingredients
Per 10 Gram Serving
Probiotics: 3 billion cfu
Prebiotics: 750 mg
1,3-1,6 Beta Glucan: 10% min.
Colostrum: 8,750 mg

Amounts are nutritional facts from the product label / published copy. Not a drug claim.

How to Use

Based on a 1,000 lb. Horse

  • Basic Maintenance 10 g with the evening feed (one serving)
  • Higher-demand periods (per your vet) 10 g morning and 10 g evening

Directions for Use: Mix thoroughly into damp feed. One serving = 10 g

Your veterinarian can help tailor the amount to your horse’s workload.

Benefits
  • Supports normal cell growth and development*
  • Supports normal tissue maintenance*
  • Supports muscle recovery after hard work*
  • Supports healthy fat metabolism for lean muscle*
  • Supports hind end and topline strength*
  • Supports stamina and muscle capacity*
  • Supports a balanced immune system*
  • Supports lean muscle development*
  • Supports muscle tone and strength*
  • Supports nutrient absorption for muscle growth*
  • Supports healthy weight management*
  • Supports overall physical performance*

*These statements are about nutritional support. ImmuBiome supplements are not intended to diagnose, treat, cure, or prevent any disease. Talk with your veterinarian about your horse’s specific needs.

Best For
  • Topline & muscle building
  • Easy keepers and metabolic support
  • Horses who need help filling out
  • Foals and young horses
  • Lay-up and return to work
  • Overall wellness
Which formula?

Choosing between formulas? The Formula Finder asks about your horse’s main goal, discipline and age, then suggests where to start.

Take the Formula Finder

Pairs well with

Lean Muscle420g · $134.00
Strength & Stamina300g · $69.00

Strength & Stamina adds stamina and strength support, plus hoof and coat, for horses building condition.

Both, 420g + 300g: $203.00

The Power of ImmuBiome

Immubiome blends medicinal and nutritional superfoods, known for their health benefits, using only human-grade, natural ingredients. Our unique technology combines Eastern and Western approaches to create high-quality nutraceuticals that support intestinal health, essential for top-performing equine athletes.

Day 1 Colostrum

Pure human-grade bovine colostrum, collected within 16 hours of calving and gently processed, supports immune function, normal tissue maintenance, a healthy gut lining, nutrient absorption, lean muscle, and athletic performance.

Pre & Probiotics

The equine gastrointestinal tract requires a balance of good and bad bacteria for health; ImmuBiome products support this with several probiotics at 3 billion per serving and prebiotic polysaccharides to maintain a healthy gut microbiome.

Proprietary Mushroom Blend

Our proprietary blend of organic mushroom mycelium, primordial fruiting bodies, and extracellular compounds harnesses powerful natural extracts to enhance immune function, support cellular health, and promote overall vitality.

1,3-1,6 Beta Glucan

Beta-glucans interact with immune cells to support the body's natural defenses, healthy gut function, and overall resilience.

ImmuBiome Technology

Our proprietary nutraceuticals are formulated with key ingredients designed to support the health and performance of equine athletes, including:

Full-spectrum medicinal mushrooms

100% human-grade bovine colostrum

Prebiotics and probiotics

Beta-glucan and related polysaccharides

Discover how each of these powerful ingredients contributes to the overall wellness and vitality of your horse.

Full-spectrum medicinal mushrooms

For centuries, traditional Eastern practices have used mushrooms to support health and vitality. These functional mushrooms are complex organisms that offer a range of beneficial compounds. They contain natural digestive enzymes, dietary fibers, and prebiotics, along with highly bioavailable vitamins such as vitamin D2. Additionally, they provide chelated minerals that promote natural absorption, essential amino acids, and beta-glucans. Mushrooms are also rich in polyphenols and antioxidants, including L-ergothioneine, one of the most potent antioxidants available. This combination of nutrients makes functional mushrooms a great ally in supporting overall health.

100% human-grade bovine colostrum

Our nutraceuticals feature 100% pure, human-grade bovine colostrum, collected within the first 16 hours of calving and gently processed to preserve its fragile proteins. Colostrum is rich in immune and specialized proteins that support normal immune function, tissue maintenance, and a healthy gut lining. It also supports digestion, nutrient absorption, and lean muscle growth. With nutrients that support strength, stamina, and recovery, colostrum is a valuable addition for equine athletes in intense work.

Prebiotics and probiotics

The equine gastrointestinal tract hosts a complex balance of beneficial and harmful bacteria. Maintaining this balance is crucial for your horse's overall health. Beneficial bacteria, or probiotics, help control harmful bacteria by competing for space along the intestinal wall. Prebiotics, often called "food" for probiotics, are equally important for optimal gut function. ImmuBiome products feature multiple probiotic species, delivering 3 billion per serving, along with full-spectrum mushroom preparations that act as natural prebiotics for hind-gut bacteria. Regular replenishment of prebiotics and probiotics supports a healthy and balanced gut microbiome.

Beta-glucan and related polysaccharides

β-glucan is a polysaccharide recognized for its immune health benefits and can be found in sources like mushrooms, yeast, algae, cereal grains, and bacteria. However, not all beta-glucans are equally effective in triggering immune responses. Their biological activity depends on factors such as molecular structure, branching, solubility, molecular weight, solution conformation, and methods of extraction and purification. Beta-glucan extracts are preferred because they can pass through the intestinal epithelial barrier via specialized M cells, allowing interaction with immune cells. In our nutraceuticals, we use two types of beta-glucans: mushroom and yeast-derived.

As experienced horsemen, we believe you should get what you paid for.

At ImmuBiome, we crafted these products to ensure that every serving is packed with active ingredients, free from sugars and fillers. We maintained the highest quality standards without compromise.

MOST COMPANIES

The Miraculous Mushrooms of ImmuBiome

Mycotherapy, rooted in Traditional Chinese Medicine, is now gaining popularity in the West. ImmuBiome, with over a decade of experience, crafts targeted equine supplements by carefully selecting and extracting the most beneficial compounds from medicinal mushrooms to support high-performance horses.

Each formula is unique, featuring one or more of our incredible mushrooms!

Lion's Mane

Traditionally valued for nerve and cognitive support, Lion’s Mane supports healthy nerve function and the normal maintenance of nerve tissue.

Reishi

Supports central nervous system health, muscle relaxation, and everyday comfort. Rich in antioxidants, it supports a balanced response to seasonal triggers. Functions as an adaptogen, helping the body adapt to stress (physical, mental, and environmental).

Cordyceps

Popular in Tibet, this mushroom supports mitochondrial function, cellular energy, and healthy circulation and oxygenation. It also supports normal reproductive health in breeding stallions.

Turkey Tail

Rich in polypeptides, it helps support a balanced immune system and upper respiratory health, and provides antioxidant support.

Antrodia camphorata

The most popular mushroom in Taiwan, it supports healthy liver and kidney function and the liver’s natural detox processes.

Maitake

Supports healthy immune function and helps maintain blood sugar levels already within the normal range, offering comprehensive support for overall well-being.

King Trumpet

Supports bone and skeletal health with high levels of natural L-ergothioneine, an antioxidant that supports normal comfort.

Chaga

Known as the "King of Mushrooms," it supports overall well-being, a normal stress response, and healthy aging. Rich in antioxidants like melanin, polyphenols, superoxide dismutase, and catalase, it helps neutralize free radicals.

Hear from our Veterinarians

Watch our video to hear what veterinarians are saying about ImmuBiome. For years, we've partnered with top vets to develop unique, high-quality active ingredients tailored for elite equine athletes. Our specialized nutrition is designed to meet the rigorous demands of competitive show schedules safely and effectively. ImmuBiome products are more than just supplements—they're precision-crafted tools trusted by veterinarians to deliver exceptional performance without the worry of toxic side effects or ingredient overlap. Discover the pinnacle of nature-inspired innovation in equine health.

Frequently Asked Questions

View answers to our frequently asked questions
Are ImmuBiome products show safe?
Does ImmuBiome use fillers?
Why does ImmuBiome use human-grade ingredients?
Why does ImmuBiome use colostrum vs whey protein?
Which ImmuBiome product is best for an easy keeper or metabolic horse?
Can ImmuBiome products be used with other supplements?
Do you have any tips for picky eaters?
What is GMP/cGMP?

At ImmuBiome, we are committed to ensuring your animals remain healthy, perform optimally, and recover swiftly. Your satisfaction with the results in your horse is our priority, which is why we offer a 100% Client Satisfaction Guarantee.

Real Clients. Real Results. Real Reviews.

MuscleProductHorseLean muscleGeldingHorsesResultsProductsSupplementBarry
  • 5 stars: 850 (95%)
  • 4 stars: 39 (4%)
  • 3 stars: 2 (0%)
  • 2 stars: 1 (0%)
  • 1 star: 0 (0%)
B
Becca (United States)
What is your horses estimated workload?: Light
What is your horses discipline?: Hunter Jumper
What is your horses age?: 21+
Helping my senior with PPID

My beloved senior gelding began losing muscle years ago, and then got a PPID diagnosis. Lean muscle helped him overcome the PPID muscle wasting, retain top line, and even helped regulate his digestion. I also appreciate Lean Muscle for its immune boosting effects and am happy to report that after a year on Prascend, my big warmblood’s levels came back within the normal range for the seasonal rise and he does not need a bigger dose of Prascend. Pretty remarkable consistency for a known progressive disease, and I do feel like Lean Muscle is a key part of helping him stay consistent in his ACTH levels, his ability to engage his immune system, his overall musculature and also his good attitude!! He looks as good or better than any other senior at our barn in spite of his diagnosis. Thanks, ImmuBiome, for helping my horse of a lifetime remain strong, happy & healthy in his senior years!!

D
Diane &.A. (United States)
What is your horses estimated workload?: Light
What is your horses discipline?: Other
What is your horses age?: 13 to 20
Lean muscle really works,

Lean muscle really works, I’m using it with Spine and Nerve for my 20 yr old who had severe Lymes Disease a few years ago that was caught early but his topline and chest weren't looking as good as I hoped. When I added Lean muscle, he was already on probiotics, it took a couple of months then I started to see a big difference now, I am reordering it -I hope this review helps someone on the fence! He was diagnosed with cushings/PPID in May and was rearing and galloping, before taking the cushings pills so Lean Muscle and Spine and Nerve are super effective.

A
Aimee W. (Canada)
What is your horses estimated workload?: Light
What is your horses discipline?: Show Jumper
What is your horses age?: 13 to 20
Helped my horse during long period off.

My horse looks fantastic. He's been off for about a year now with an injury and although still gets turnout and hand walking, he hasn't done much else. I only started the protocol in December 2025 - about 7 months into our year off and he looked better after starting the protocol. I thought he'd lose a lot of his muscle but he really hasn't and I am a big believe it is thanks to the Lean Muscle!

L
Lauri (United States)
What is your horses estimated workload?: Light
What is your horses discipline?: Other
What is your horses age?: 21+
Barry is better!

I already had Barry on Nerve and Spine and now have added Lean Muscle…he is doing so much better!

J
Jamie B. (United States)
What is your horses estimated workload?: Medium
What is your horses discipline?: Other
What is your horses age?: 13 to 20
This product is outstanding

This product is outstanding. We use it for 2 retired jumpers and an older pony. Moving them from FL to NC had its challenges for them physically and Lean Muscle has helped them every step
Of the way. Their coats, feet and most importantly their muscling is so defined. You’d think they were still show horses.

E
Erin B. (Kuwait)
What is your horses estimated workload?: Strenuous
What is your horses discipline?: Other
What is your horses age?: 13 to 20
Lean muscle added to autoship.

My daughters 16 yr old gelding suffered from EPM when we bought him. We started him on Lean muscle and we havent had any issue with EPM since. Lean muscle has become a staple on our ranch and use it with our mares that are in foal as well for a smoother birth and a healthier foal. I have referred Lean muscle to many friends who has seen fantastic results.

J
Jacqueline J. (United States)
What is your horses estimated workload?: Medium
What is your horses discipline?: Hunter Jumper
What is your horses age?: 8 to 12
Amazing

Amazing, quick results! I love immubiome lean muscle! It really works!

S
Shannon J.
What is your horses estimated workload?: Light
What is your horses discipline?: Western
What is your horses age?: 21+
Excellent for my 20 something gelding

My rescue gelding struggled with keeping on weight and muscle. He’s been on about a year of lean muscle and improves every day. The photos are about 4 bottles of lean muscle between them. He’s looking even better now and maybe I can update this later. But I would say he’s improved immensely since I’ve had him on lean muscle and strength and stamina. His joints are nice and gooey and his arthritis seems more comfortable for him even in the winter!

E
Erika G. (United States)
What is your horses estimated workload?: Heavy
What is your horses discipline?: Show Jumper
What is your horses age?: 8 to 12
Amazing product with results

Lean muscle has not only changed my horses, but my client horses as well. I love the pre and pro biotics and natural ingredients. My horses eat it right up, and they look amazing!

N
N.N. (United States)
What is your horses estimated workload?: Heavy
What is your horses discipline?: Dressage
What is your horses age?: 4 to 7
Love it so far

My 6 year old dressage mare has been on this a couple weeks. Within days her coat had visibly improved and I like how she is gaining weight/muscle. She has been in full training for 2 years but was still scrawny. The product is not cheap but glad I tried it, she was clearly missing something in her diet which this has helped fill in.

C
Casey R. (United States)
What is your horses estimated workload?: Medium
What is your horses discipline?: Western
What is your horses age?: 21+
Impressed

I am so impressed that such a small amount can do so much. My old man is vet checked at mid 20s with terrible teeth. We had been struggling to find something to help him. The video doesn’t do justice. But I’ll put a before video and an after video of him on it for 2 months. I just wish there were more coupons or better discounts.

F
Freya's M. (United States)
What is your horses estimated workload?: Light
What is your horses discipline?: Dressage
What is your horses age?: 21+
Took 10 years off my mare's age

My mare was on stall rest for 6 months (corollary desmitis) and lost every bit of muscle she had. The trainer who helped me bring her back recommended Lean Muscle Builder. Her massage therapist says Freya has never looked better. She's 26 and I ride her about 3 times a week. We couldn't be happier with the results from this supplement.

P
Pat L. (Canada)
What is your horses estimated workload?: Medium
What is your horses discipline?: Dressage
What is your horses age?: 8 to 12
Loves the taste, I like his movement

My gelding is PSSM1/px. I have noticed his body feels more supple, more forward, less attitude working. I believe his gut feels better.

K
KQ (United States)
What is your horses estimated workload?: Medium
What is your horses discipline?: Western
What is your horses age?: 13 to 20
🙌🏻 Immibiome for the Win 🙌🏻

My gelding was recently diagnosed with PPID (normal insulin & bloodsugar). You could tell that he just wasn’t feeling like himself. I had taken him off of Lean Muscle in an attempt to save money 🤦🏼‍♀️ and I got a vet bill instead. He’s been back on it a month and the improvements are noticeable; better muscle, top line, coat and improved mood. I’m buying the big tub.

C
CustomerJanet J. (United States)
What is your horses estimated workload?: Medium
What is your horses discipline?: Other
What is your horses age?: 21+
Awesome Changes

This 22 year old that I lease has struggled with weight swings, inconsistent muscle development and maintaining a topline for many years. This product has made an incredible difference in him. Here he is with his Mom!

A
Annadurham (United States)
What is your horses estimated workload?: Light
What is your horses discipline?: Racing
What is your horses age?: 8 to 12
We love lean muscle

Our thoroughbred was having trouble gaining weight and couldn’t be ridden to help build muscle. Lean muscle for 3-4 weeks had helped him fill out his top line and start to build muscle as well.

L
Laura (United States)
What is your horses estimated workload?: Strenuous
What is your horses discipline?: Other
What is your horses age?: 13 to 20
I was really worried

My pregnant mare had terrible FWS. Nothing worked, none of the supplements and tricks made for treating it. My vet suggested calling Immubiome about the "Lean Muscle" for my mare. You said it would be safe and it CLEARED up her really loose stool in a few days. And all is good and well.

M
Michelle G. (United States)
What is your horses estimated workload?: Heavy
What is your horses discipline?: Dressage
What is your horses age?: 13 to 20
Lean Muscle is amazing!

My FEI dressage horse has really firmed up his top line and strengthened through his stifles since being on Lean Muscle.
He has always struggled with a bit of stifle weakness which ultimately affected his ability to produce good top line muscle. Well, thanks to Lean Muscle, not anymore!