You’ve probably seen lion’s mane on an ingredient list somewhere recently. Maybe on a supplement label, maybe on the back of a can. It’s one of those ingredients that went from total obscurity to appearing everywhere in about eighteen months flat. So what is it, and should you care?
Lion’s mane is a mushroom. Not the kind you throw in a risotto. It’s a white, shaggy, oddly beautiful fungus that’s been used in East Asian cooking and traditional medicine for centuries. In Chinese and Japanese food, it’s eaten whole, sometimes described as tasting a bit like crab or lobster. But the recent Western interest in it has almost nothing to do with flavour. It’s about what it does in the brain.
The active compounds that researchers keep coming back to are called hericenones and erinacines. Both are found in the mushroom’s fruiting body and mycelium, and both can cross the blood-brain barrier, which is the part that matters. Once there, they appear to stimulate the production of nerve growth factor, or NGF. NGF is a protein your brain uses to maintain, grow, and repair neurons. It’s not a trivial thing. Without it, nerve cells deteriorate.
The clinical research is still young, and it’s worth being honest about that. A 2009 trial gave 30 older adults with mild cognitive impairment either lion’s mane extract or a placebo for 16 weeks. The lion’s mane group showed measurable cognitive improvements at weeks 8, 12, and 16. But when they stopped taking it, the benefit faded. A separate 12-week trial of 31 adults over 50 found improvements on one out of three cognitive tests. Not a slam dunk, but not nothing either.
More recently, a 2023 pilot study at Northumbria University tested lion’s mane on 41 healthy adults aged 18 to 45. The group taking 1.8g daily performed faster on a cognitive interference task after a single dose, and showed a trend toward lower subjective stress after 28 days. Again, a small study with real limitations. But it’s one of the first to look at healthy young people rather than older adults already experiencing decline.
A 2024 systematic review published in Neuroscience & Biobehavioural Reviews pulled together 34 human studies on mushrooms and brain health. The findings were mixed, but lion’s mane showed the most consistent signals for mood and cognitive function in middle-aged and older adults. The honest summary is: promising, early, needs more work.
So why put it in a drink? Because the research direction is encouraging, the safety profile is solid, and the traditional use stretches back a long way. COG includes lion’s mane alongside a full spectrum of B vitamins, zinc, and vitamin D. The idea isn’t that one ingredient does everything. It’s that a well-chosen combination, in a format you’ll actually consume daily, gives your brain more of what it needs to function well.
There’s a growing body of evidence suggesting lion’s mane belongs in the conversation about cognitive support. And frankly, it tastes a lot better than swallowing capsules.
