Lion's Mane Mushroom Extract

Lion's Mane Mushroom Extract is a single-species organic mushroom supplement for dogs — a concentrated brain and nerve support powder made from 100% whole, certified organic Lion's Mane (Hericium erinaceus) fruiting bodies grown on natural wood substrate. Third-party tested to contain a minimum of 25% beta-glucans, it delivers the active compounds uniquely associated with cognitive and neural function.

Unlike other medicinal mushrooms, Lion's Mane contains two distinctive compound groups — hericenones and erinacines — that can cross the blood-brain barrier and influence the synthesis of Nerve Growth Factor (NGF), a protein essential for maintaining, repairing, and organising neurons. This makes Lion's Mane the specialist in the mushroom range for cognitive health, nerve function, and behavioural support. Available in 35.1g.

Hericenones and erinacines are two groups of compounds found almost exclusively in Lion's Mane mushroom. What makes them remarkable is their ability to cross the blood-brain barrier — a tightly regulated filter that keeps most substances out of the brain — and interact directly with neural tissue. Once there, they stimulate the synthesis of Nerve Growth Factor (NGF), a protein that maintains existing neurons, encourages the growth of new ones, and supports the repair of damaged nerve cells. No other mushroom in the Four Leaf Rover range has this specific action.

Most mushroom supplements on the market are not really mushrooms. They're mycelium — the root-like structure of the fungus — grown in plastic bags of oats, sorghum, or rice, then ground up together with the grain. The result is a powder that is mostly starch, with minimal actual mushroom content. The active compounds live primarily in the mushroom's fruiting body, not the mycelium — and this is particularly true for the hericenones and erinacines that make Lion's Mane distinctive.

Four Leaf Rover Lion's Mane is made from the whole, mature mushroom — fruiting body and all — grown naturally on wood in filtered-air greenhouses. No grain substrate. No hidden starch. Just concentrated mushroom. This is why the beta-glucan content can be guaranteed at 25%+ per batch, and why the hericenones and erinacines are present in meaningful concentrations.

Lion's Mane contains two categories of active compounds: water-soluble beta-glucans and alcohol-soluble hericenones and erinacines. A single extraction method only captures half the story. Four Leaf Rover uses a double-extraction process — water extraction to capture the beta-glucans, alcohol extraction to capture the brain-active compounds — then combines them into a single powder. The result is a supplement where the full spectrum of Lion's Mane's benefits is bioavailable to your dog.

Supports cognitive function in senior dogs. Age-related cognitive decline in dogs — sometimes called canine cognitive dysfunction — shows up as confusion, disorientation, disrupted sleep patterns, and withdrawal from familiar routines. Lion's Mane's support for NGF synthesis helps maintain the neural infrastructure these processes depend on. Particularly well-suited as part of a long-term senior-dog regimen.

Supports calm, balanced behaviour. Lion's Mane is often described as naturally calming. For anxious dogs, reactive dogs, or dogs who struggle with stress, the nervous system support translates into steadier, more regulated behaviour over time. Not an acute sedative — a structural support that builds gradually.

Supports nerve repair and spinal health. For dogs recovering from spinal injuries, neurological episodes, or conditions affecting nerve function (including degenerative myelopathy and IVDD-related inflammation), Lion's Mane provides nutritional support that complements whatever medical treatment is underway.

Supports healthy weight and blood sugar balance. Lion's Mane has gut-friendly effects that help dogs maintain a consistent weight, and supports healthy blood sugar levels. A useful secondary benefit for senior and overweight dogs.

Supports immune function. Like all medicinal mushrooms, Lion's Mane contributes beta-glucans that support a balanced immune response — not its primary action, but a meaningful part of the overall benefit.

Lion's Mane is the Four Leaf Rover mushroom to choose when the primary goal is cognitive, neural, or behavioural support. Senior dogs showing signs of cognitive change. Anxious or reactive dogs. Dogs recovering from spinal or neurological issues. Dogs with a history of seizures. Dogs whose owners want long-term support for brain health and nervous system resilience. For immune support as the primary goal, Turkey Tail delivers higher beta-glucan content. For broad whole-body mushroom coverage across multiple body systems, Seven 'Shrooms combines Lion's Mane with six other mushrooms in one formula.

Every batch of Lion's Mane is third-party tested for beta-glucan content, pesticides, heavy metals, and microbial contaminants, with a Certificate of Analysis available on request. Four Leaf Rover holds the NASC Quality Seal — the benchmark for quality control in the pet supplement industry — and is certified Plastic Negative by rePurpose Global, removing twice the plastic from the environment that it creates. Manufacturing is GMP-compliant.

Active ingredients. Source: Four Leaf Rover.

Organic Lion's Mane (Hericium erinaceus) Mushroom Extract — fruiting body, double-extracted, guaranteed minimum 25% beta-glucans, rich in hericenones and erinacines.

Free from: grain, mycelium-on-grain fillers, preservatives, synthetics, artificial flavourings, artificial colourings, GMO ingredients, gluten, and dairy.

Add to food once daily. Measure according to your dog's body weight using the guide below.

A 35.1g jar typically lasts anywhere from around three weeks to several months depending on your dog's size. Lion's Mane is safe for long-term daily use and builds benefit over time.

Store in a cool, dry place away from direct sunlight. Refrigeration is not required but will help maintain freshness over time. Keep the lid tightly sealed.