From brain health to immune support, functional mushrooms and their benefits are being explored in labs and journals all over the world.
So, what is it that makes these mushrooms the ‘fun-gi?’ (see what we tried to do there?) and, more importantly, what does the science say?
What are functional mushrooms?
Functional mushrooms are not your average button mushrooms.
Whilst they are edible, they are not what we’d usually stir into our spaghetti bolognese or shepherd’s pie. They’re primarily valued for their bioactive compounds – natural chemicals that have been shown to positively affect human health.
Popular types include:
- Lion’s Mane (Hericium erinaceus)
Supports cognitive function and nerve regeneration.
- Reishi (Ganoderma lucidum)
Known for calming, immune-modulating, and anti-inflammatory properties.
- Cordyceps (Cordyceps militaris)
Linked to increased energy, endurance, and oxygen use.
- Chaga (Inonotus obliquus)
Rich in antioxidants, traditionally used for immune and skin health.
- Turkey Tail (Trametes versicolor)
Studied for its cancer-fighting and gut-supportive benefits.
‘Shroom to grow – brain health and nerve growth
Lion’s Mane is perhaps the most studied functional mushroom for brain health. Its active compounds – hericenones and erinacines – have been shown to stimulate Nerve Growth Factor (NGF), a protein essential for the growth and survival of neurons.
A study found that older adults with mild cognitive impairment who took Lion’s Mane daily showed significantly improved cognitive scores compared to placebo. Impressive!
Several other mushrooms – including Reishi, Turkey Tail, and Chaga – are known for their immunomodulatory properties. Simply put, it means that not only do they boost the immune system but also help to balance and support it – all based on what your body needs.
A review outlined how Reishi’s polysaccharides and triterpenes help regulate immune function and reduce oxidative stress, whereas Turkey Tail is especially rich in polysaccharide-K (PSK) and polysaccharopeptide (PSP), which have been shown to stimulate immune cell activity.
Cordyceps has long been used in traditional Chinese medicine to support stamina, but now science is catching up. It’s known to enhance the body’s production of ATP, the energy currency of cells.
A study found that Cordyceps improved exercise performance and oxygen uptake in older adults. Other research suggests it may help balance cortisol levels and support adrenal function during times of chronic stress.
Many functional mushrooms act as natural antioxidants, helping to neutralise free radicals that cause ageing and disease. Chaga, in particular, is one of the highest antioxidant-containing foods on the planet, rich in polyphenols and melanin.
A 2004 study found that Chaga mushroom extract significantly reduced oxidative DNA damage in human lymphocytes, highlighting its strong antioxidant properties.
Several mushrooms, especially Turkey Tail, contain prebiotic fibres and beta-glucans that support beneficial gut bacteria. A healthy gut microbiome is closely linked to immune function, mood, and inflammation control. One particular study found that Turkey Tail supplementation was found to increase microbial diversity and beneficial bacterial strains in human subjects.
“Functional mushrooms are generally considered safe, but effectiveness depends on quality.”
The ancient world meets modern science
Traditional Chinese Medicine (2000+ years)
Mushrooms like Reishi were reserved for royalty and considered more valuable than gold.
Ancient texts describe them as “superior herbs” that could be taken daily without side effects.
Japanese Traditional Medicine
Maitake and other mushrooms were integrated into daily meals and medicinal preparations, with samurai warriors reportedly consuming them for strength and vitality – powerful!
Tibetan Medicine
High-altitude Cordyceps was discovered by Tibetan herders who noticed their livestock became more energetic after grazing on these fungi.
What you need to know before supplementing
Before supplementing, make sure that you understand how to take the mushrooms and what type your body needs most.
Here are some tips:
- Start slowly – begin with a low dose and keep an eye on how your body responds before gradually increasing to the recommended amount on the label.
- Be consistent – benefits typically rise over time, often after several weeks of consistent, daily use.
- Time it right – some mushrooms are best taken at certain times.
- Match mushroom type to goals – different mushrooms offer different potential benefits.
Functional mushrooms are generally considered safe, but effectiveness depends on quality:
- Fruiting body vs mycelium – Fruiting body extracts tend to contain more active compounds.
- Dual extraction – Captures both water- and fat-soluble compounds.
- Third-party testing – Ensures potency, purity, and safety.
- Consistency – Effects build over weeks or months of regular use.
An important note, as always, is to consult your healthcare provider – especially if you’re pregnant, breastfeeding, or taking medications.
They mush be clever
Functional mushrooms are not magic – but they are intelligent. Rooted in centuries of traditional use and backed by modern science, these fungi offer unique support for brain health, immunity, energy and resilience.
The science is still unfolding, but the story is clear: when it comes to supporting human health, mushrooms are more than just food – they’re a fungi-functional force of nature.
Original source: It Mush Be Good
