Lion's Mane, NGF and nerve health

Lion's Mane is the functional mushroom most studied for brain and cognitive support, and the reason is a single mechanism: its compounds are studied for supporting nerve growth factor (NGF), a protein your nervous system uses to maintain and repair neurons. That is what sits behind its reputation for focus, memory and mental clarity. Here is what the research actually supports, and what it does not.

The NGF mechanism, in plain terms

Lion's Mane (Hericium erinaceus) contains two families of active compounds: hericenones, concentrated in the fruiting body, and erinacines. In laboratory studies these have been shown to stimulate the production of nerve growth factor (NGF), and to a lesser extent brain-derived neurotrophic factor (BDNF). NGF is essential for the growth, maintenance and survival of neurons, so anything that supports it is of real interest for brain health. This is the mechanism behind essentially every cognitive claim made about Lion's Mane; the rest is detail.

What the human evidence shows

The most-cited human study is a Japanese double-blind, placebo-controlled trial in older adults with mild cognitive impairment: over 16 weeks the group taking Lion's Mane scored better on a cognitive scale than the placebo group, though the scores drifted back after they stopped taking it (Mori et al., 2009). A later trial also reported improvements in cognitive function with oral intake (Saitsu et al., 2019), and a separate small study reported reduced feelings of anxiety and low mood after four weeks (Nagano et al., 2010). These are promising, but they are small and early. Lion's Mane is a well-evidenced nootropic by mushroom standards, which is a modest bar, not a proven cognitive drug.

Focus, memory and mood

Putting the studies together, the areas where Lion's Mane is most plausibly useful are:

• Focus and mental clarity, via NGF support of healthy neuron function.
• Memory, through the same support of the neural pathways involved in learning and recall.
• A balanced mood, where the early trial evidence points to modest support for calm rather than any dramatic effect.

These are all support for normal function, not treatment. Lion's Mane is a maintenance-and-support tool for a healthy brain, not a therapy for any diagnosed condition.

Is it safe?

Lion's Mane is generally well tolerated in the studies done so far, with no serious adverse effects reported in the trials above. As always, if you are pregnant, breastfeeding, taking medication or managing a health condition, check with your healthcare provider before starting any supplement.

How to take it

Shumi's Lion's Mane is a dual-extracted liquid from the fruiting body, where the hericenones are, about 2 ml a day (two half-pipettes). Because the NGF effect is cumulative, consistency over weeks matters far more than timing; we go into the options in when to take Lion's Mane. For the separate question of Lion's Mane and inflammation, see Lion's Mane and a balanced inflammatory response. Explore Shumi's organic Lion's Mane extract.

References

1. Mori, K., Inatomi, S., Ouchi, K., Azumi, Y., & Tuchida, T. (2009). Improving effects of the mushroom Yamabushitake (Hericium erinaceus) on mild cognitive impairment: a double-blind placebo-controlled clinical trial. Phytotherapy Research : PTR, 23(3), 367-72. https://doi.org/10.1002/ptr.2634
2. Saitsu, Y., Nishide, A., Kikushima, K., Shimizu, K., & Ohnuki, K. (2019). Improvement of cognitive functions by oral intake of Hericium erinaceus. Biomedical Research (Tokyo, Japan), 40(4), 125-131. https://doi.org/10.2220/biomedres.40.125
3. Nagano, M., Shimizu, K., Kondo, R., Hayashi, C., Sato, D., Kitagawa, K., & Ohnuki, K. (2010). Reduction of depression and anxiety by 4 weeks Hericium erinaceus intake. Biomedical Research (Tokyo, Japan), 31(4), 231-7. https://doi.org/10.2220/biomedres.31.231
4. Friedman, M. (2015). Chemistry, Nutrition, and Health-Promoting Properties of Hericium erinaceus (Lion's Mane) Mushroom Fruiting Bodies and Mycelia and Their Bioactive Compounds. Journal of Agricultural and Food Chemistry, 63(32), 7108-23. https://doi.org/10.1021/acs.jafc.5b02914