Stress and anxiety are among the most reported health concerns in modern clinical settings. Alongside conventional approaches, functional mushrooms have drawn increasing scientific attention as potential modulators of the stress response. Several species show preliminary evidence of adaptogenic properties, acting on the hypothalamic-pituitary-adrenal (HPA) axis, neurotrophin signaling, and inflammatory pathways implicated in psychological well-being. This review examines what current research indicates, and where the evidence remains limited.
What Does “Adaptogenic” Mean in the Context of Mushrooms?
The term adaptogen refers to a substance that may help the body maintain homeostasis under physiological or psychological stress. In botanical medicine, adaptogens are typically defined by their ability to modulate stress mediators, such as cortisol and adrenocorticotropic hormone (ACTH), without overstimulating or suppressing normal function. Several functional mushrooms have been investigated under this framework, though the clinical evidence base varies considerably across species.
Lion’s Mane and Mood-Related Outcomes
Hericium erinaceus, commonly known as Lion’s Mane, is among the most studied functional mushrooms for neurological and psychological outcomes. Its bioactive compounds, particularly hericenones (from fruiting bodies) and erinacines (from mycelium), are thought to stimulate nerve growth factor (NGF) production and support neurogenesis in regions of the brain associated with mood regulation.
Human Clinical Evidence
A randomized clinical study in participants affected by overweight or obesity, many of whom reported mood and sleep disturbances, found that eight weeks of oral H. erinaceus supplementation was associated with reductions in self-reported depression, anxiety, and sleep disorder scores. Researchers also observed increases in circulating pro-BDNF levels, suggesting a possible neurotrophin-mediated mechanism.[1]
A 2025 systematic review further consolidated findings across randomized controlled trials, pilot clinical trials, and observational studies, concluding that H. erinaceus may support improvements in anxiety, depression, and sleep quality. The review noted that the mushroom appears to promote hippocampal neurogenesis and enhance BDNF production, both of which are pathways associated with stress resilience.[2]
Preclinical work has further investigated specific compounds within Lion’s Mane mycelium. Research involving erinacine S, a small molecule derived from H. erinaceus mycelium, demonstrated protective effects against demyelination and a reduction in anxiety-like and depressive-like behavior in rodent models. While animal data does not translate directly to human outcomes, these findings inform ongoing mechanistic research.[3]
Reishi and the HPA Axis
Ganoderma lucidum, or Reishi, has a long history in traditional East Asian medicine as a tonic for calm and mental clarity. Modern research has begun to examine whether its polysaccharides and triterpenoids interact with stress-related biological pathways.
Evidence for Fatigue and Well-Being
A double-blind, placebo-controlled trial involving 132 patients with neurasthenia, a syndrome characterized by persistent fatigue, anxiety, and mental exhaustion, found that eight weeks of supplementation with a Ganoderma polysaccharide extract (Ganopoly) was associated with significantly greater improvements in the Clinical Global Impression severity scale and sense of fatigue compared to placebo. More than half of participants in the treatment group were rated as meaningfully improved, versus approximately 25% in the placebo group.[4]
It is worth noting that neurasthenia, while not a standard diagnosis in Western psychiatry, overlaps substantially with presentations of chronic stress and anxiety-related fatigue. These findings are encouraging, though replication in broader populations remains needed.
Cordyceps and Stress Adaptation
Ophiocordyceps sinensis and the cultivated species Cordyceps militaris have been studied primarily for their energetic and respiratory effects. Research also suggests potential adaptogenic properties. Studies in animal models have observed that Cordyceps extracts may modulate antioxidant responses and attenuate pro-inflammatory cytokine activity under various stress conditions, including hypoxia and cold-restraint stress.
While human clinical data specifically targeting psychological stress outcomes with Cordyceps alone remains limited, its inclusion in functional mushroom blends has been examined. A 2026 randomized, double-blind, placebo-controlled trial using a multi-mushroom supplement formulation (Restake) measured anxiety using validated tools including the State-Trait Anxiety Inventory (STAI-S) and Hamilton Anxiety Scale (HAM-A). Participants receiving the mushroom blend showed significantly greater reductions in anxiety scores at both six and twelve weeks, along with reductions in serum cortisol and ACTH levels compared to placebo.[5]
Proposed Mechanisms Across Species
Across the species reviewed, several overlapping mechanisms appear relevant to stress and anxiety modulation:
- HPA axis regulation: Research suggests that certain mushroom polysaccharides may help modulate cortisol and ACTH secretion, potentially buffering the physiological stress response.
- Neurotrophin support: Lion’s Mane bioactives have been associated with NGF and BDNF pathway activity, both of which are implicated in emotional resilience and neuroplasticity.
- Anti-inflammatory activity: Chronic low-grade inflammation is associated with anxiety and depression. Several mushroom species contain beta-glucans and triterpenes with documented anti-inflammatory properties in laboratory and animal research.
- Antioxidant activity: Oxidative stress is increasingly recognized as a factor in mood disorders. Many functional mushrooms contain phenolic compounds with free radical scavenging activity.
Limitations and Research Gaps
The existing body of research, while promising, carries important caveats. Many studies involve small sample sizes, short durations, or populations that may not generalize broadly. Mechanistic work is often conducted in rodent models, which do not always translate to human biology. Standardization of extracts across studies is inconsistent, making direct comparisons difficult. Clinical trials specifically focused on diagnosable anxiety disorders, rather than subclinical stress measures, are limited.
Individuals currently managing anxiety or stress-related conditions with prescribed treatments should consult a qualified healthcare provider before adding mushroom supplements, as interactions with medications remain an area requiring more research. For a broader overview of how individual mushrooms compare across health goals, see our guide to Lion’s Mane vs Reishi: Which Mushroom Is Right for You?
Summary
Research indicates that Lion’s Mane, Reishi, and certain multi-mushroom formulations may support aspects of stress and anxiety management through neurotrophin, anti-inflammatory, and HPA axis pathways. The most consistent human evidence currently exists for Lion’s Mane in mood-related outcomes and Reishi in fatigue and well-being measures. Multi-species combinations show early promise in reducing validated anxiety scores and stress biomarkers. This field is active and evolving, and higher-quality clinical trials are expected to clarify the practical utility of these species for stress-related health outcomes.
References
- [1] Vigna L, et al. Hericium erinaceus Improves Mood and Sleep Disorders in Patients Affected by Overweight or Obesity. Evid Based Complement Alternat Med. 2019. PMID: 31118969
- [2] Menon A, et al. Benefits, side effects, and uses of Hericium erinaceus as a supplement: a systematic review. Front Nutr. 2025. PMID: 40959699
- [3] Fu JT, et al. Erinacine S, a small active component derived from Hericium erinaceus, protects oligodendrocytes and alleviates mood abnormalities. Biomed Pharmacother. 2024. PMID: 38394854
- [4] Tang W, et al. A randomized, double-blind and placebo-controlled study of a Ganoderma lucidum polysaccharide extract in neurasthenia. J Med Food. 2005. PMID: 15857210
- [5] Hisamuddin AS, et al. Adaptogenic Effects of Mushroom Blend Supplementation on Stress, Fatigue, and Sleep: A Randomised, Double-Blind, and Placebo-Controlled Trial. Brain Behav. 2026. PMID: 41540766
Disclaimer: This article is for informational purposes only and does not constitute medical advice. Functional mushroom supplements are not intended to diagnose, treat, cure, or prevent any disease or condition. Consult a qualified healthcare professional before starting any new supplement, especially if you are taking medications or managing a health condition.
