PSSMFLEX 🍃JUNE SALE - 20%-OFF *Organic herb & nutrient blend for horses - daily support for muscle stiffness, tying-up patterns, and energy metabolism

When movement restriction is coming from muscle rather than joint, the signs often look a little different.

Your horse feels tight through the body. They take longer than they should to warm up. Movement can feel short, restricted, or lacking its usual swing and freedom. Some horses seem to hold themselves, almost as though they're bracing against their own muscles.

In horses prone to PSSM and related muscle-metabolism patterns, the issue isn't always strength - it's efficiency.

Muscles may struggle to access and use energy effectively, leading to tension, fatigue, stiffness, and the familiar feeling that your horse is working harder than they should for the movement they're producing.

That's where PSSMFlex comes in.

Rather than focusing on joints or general comfort, PSSMFlex is designed to support muscle function itself - helping muscles use fuel more efficiently, release tension more readily, and recover more effectively after work.

By combining targeted amino acids with muscle-relaxing botanical support, it helps maintain smoother, more comfortable movement and a more consistent way of going day to day.

In simple terms? Support the muscle system properly, and the movement begins to flow again.

PSSMFlex is a good fit when your horse feels tight, restricted, or reluctant in their movement – especially in horses with PSSM or PSSM-type muscle patterns.

✔ Feels tight, short, or restricted, particularly when first moving off
✔ Takes a long time to warm up, or never quite feels loose
✔ Shows signs of stiffness through the back, hindquarters, or whole body
✔ Can feel wooden, choppy, or lacking swing
✔ Has a history of PSSM, tying-up, or muscle soreness after work
✔ Feels better with consistent work and routine, but worse with rest or change
✔ You’re instinctively thinking “this feels muscular, not joint-related”

In short: if your horse has PSSM or shows those tight, holding, muscle-based movement patterns, PSSMFlex is the support that helps muscles relax, work more efficiently, and move more freely.

How PSSMFlex fits into your horse’s support plan

PSSMFlex is designed as your muscle-focused foundation – supporting muscle relaxation, energy metabolism, and recovery in horses prone to stiffness, tightness, or tying-up patterns.

Where joint-based blends focus on structure or comfort, PSSMFlex works at the level of muscle function itself – helping muscles use energy more efficiently, release tension, and move more freely.

For many horses, this becomes the starting point when movement feels restricted from a muscular, rather than joint-based, origin.

From there, support can be layered depending on what you’re seeing.

Supporting structure alongside muscle

• JointReflexa – where additional support for connective tissue, joint integrity, and long-term structural soundness is needed

Adding comfort support (as needed)

• JSTTonic – to support day-to-day comfort where stiffness begins to overlap with wear-and-tear patterns
• DuoBute – for additional daily support where muscles or surrounding tissues feel tight or uncomfortable
• TriBute – for short-term support during flare-ups, workload changes, or more reactive phases

This creates a layered approach – supporting muscle function at its core, while adapting around comfort, structure, and deeper metabolic needs where required.

Foundation support

Without a solid mineral foundation, even the best muscle and joint support can only go so far. Supporting your horse’s baseline nutrition with a forage-based mineral blend such as VitaComplete or EquiVita helps maintain connective tissue strength, recovery, and long-term mobility.

In summary?

Use PSSMFlex to support muscle function and energy use – layer structural and comfort support as needed, and look deeper when patterns persist.

PSSMFlex is a nutritional, functional food supplement and not veterinary medicine. See Dr Kellon's Horse Sense - Nutrition is not 'Alternative' Therapy .

Composition glossary

Each ingredient in PSSMFlex works at a deep cellular level to support healthy muscle metabolism, ease tension, and maintain comfortable, confident movement.

Together, they help your horse manage PSSM-related stiffness by supporting smooth muscle relaxation, efficient energy production, and resilient muscle tissue - for fluid, freer movement every day.

1. L Glutamine - A key amino acid and the most abundant in skeletal muscle. It supports healthy muscle fibre repair, helps maintain cellular resilience after exercise or stress, and nourishes tissues involved in recovery. Its role in protein synthesis makes it especially valuable for horses prone to muscle soreness or tightness.
2. Acetyl L-Carnitine - A highly bioavailable form of L-Carnitine that shuttles fatty acids into the mitochondria — the cell’s energy centres — to help muscles produce clean, efficient fuel. Supports stamina, reduces exercise intolerance, and may help horses prone to tying-up or stiffness improve their energy metabolism.
3. Viburnum opulus (Cramp Bark) - A classic botanical for easing smooth and skeletal muscle tension. Its gentle antispasmodic properties help calm tight, over-contracted muscle fibres, supporting freer movement and reducing the discomfort associated with PSSM-related muscular rigidity.

Feed guide

5g/100kg bodyweight per day, i.e. 25g for a 500kg horse.

• 1 level 15ml scoop = 10-grams.

• Amino acids manufactured to ISO, BP, USP & EP requirements and/or food grade specifications.
• NB. Each ingredient is available separately - links above.

PSSMFlex is structured as a targeted muscle support blend, designed to work at the level of muscle metabolism, energy use, and tension regulation.

Rather than focusing on joints or general comfort, it supports the way muscles function - how they produce energy, how they contract and release, and how they recover after work.

In horses prone to PSSM-type patterns, the issue is often not strength, but efficiency. Muscles can struggle to access and use fuel correctly, leading to tightness, fatigue, and that familiar “holding” feeling through the body.

PSSMFlex brings together key amino acids and muscle-relaxing botanicals that support these processes - helping muscles use energy more effectively, release tension more easily, and maintain a more fluid, responsive way of going.

Think of it as supporting the engine of movement : not the joints that guide it, but the muscles that power it.

Functional intent

PSSMFlex is designed to support muscle function, energy metabolism, and tension release in horses prone to stiffness, tightness, or tying-up patterns.

It works across three key areas:

• muscle energy production and utilisation
• muscular relaxation and tension release
• tissue recovery and resilience

Functional categories – muscle support in action

1. Muscle Energy Production & Metabolism - Acetyl L-Carnitine
   Supporting the efficient use of fatty acids within muscle cells, helping maintain steady energy supply and reduce fatigue or exercise intolerance.
2. Muscle Fibre Relaxation & Tension Release - Viburnum opulus (Cramp Bark)
   Supporting the natural ability of muscle fibres to contract and release, helping reduce tightness, stiffness, and that “held” feeling through the body.
3. Muscle Repair & Tissue Resilience - L-Glutamine
   Providing key amino acids required for muscle repair, recovery, and overall tissue integrity following work or metabolic strain.

Big picture

PSSMFlex is designed to support how muscles function - how they fuel, move, and recover.

Used consistently, it helps horses feel looser, more capable, and more comfortable in their bodies, particularly where movement restriction is driven by muscular rather than structural factors.

In simple terms: support the muscle system properly, and the movement begins to flow again.

Advisories