In today’s fast-paced U.S. lifestyle—where metabolic health and healthy aging are increasingly prioritized—autophagy has moved from an obscure biological term to a more widely discussed health concept. Within biomedical research, attention has shifted from only treating symptoms to also understanding cellular maintenance processes that may influence healthspan (the years of life spent in good health).
A pivotal moment in this shift occurred in 2016, when Dr. Yoshinori Ohsumi was awarded the Nobel Prize in Physiology or Medicine for discoveries that clarified key mechanisms of autophagy using yeast models (Nobel Prize, 2016). Since then, autophagy has remained a major focus of modern biomedical study—both because it supports normal cellular “cleanup” and because dysregulated autophagy has been implicated across many disease models, reinforcing the idea that balance matters (Klionsky et al., 2021; Linder & Kögel, 2019).
Beyond academic labs, the “longevity” space has also attracted unusually large bets from the tech world. In recent years, high-profile founders and executives have backed aging-biology startups with headline-making checks—such as reports of Jeff Bezos among early supporters of Altos Labs’ multi-billion-dollar launch (Taylor, 2022), Sam Altman funding Retro Biosciences’ $180 million seed round (Rollet, 2025), and Coinbase CEO Brian Armstrong co-founding NewLimit, which raised a $130 million Series B (Temkin, 2025). This surge of capital doesn’t prove any single approach works, but it does signal growing confidence that core “cell maintenance” mechanisms—like autophagy—are worth serious research investment (Klionsky et al., 2021).
Autophagy Definition: Your Cell’s Recycling and “Cleanup” System
Autophagy (from Greek for “self-eating”) is a conserved process cells use to break down and recycle internal components—such as worn-out organelles and misfolded proteins—so those materials can be reused for energy and repair (Klionsky et al., 2021). A key step is the formation of a double-membrane vesicle called an autophagosome, which encloses cellular “cargo” (Klionsky et al., 2021).
The autophagosome then fuses with a lysosome, where enzymes degrade the cargo into reusable building blocks (Klionsky et al., 2021).
Important nuance: Autophagy isn’t “always better.” Researchers emphasize autophagic flux—the full process of formation and successful breakdown—because changes in markers can be misinterpreted if the system is “stalled” rather than functioning efficiently (Klionsky et al., 2021). Autophagy can also play complex roles in disease biology, which is why context and balance are key (Linder & Kögel, 2019).
Autophagy and Fasting: Why Nutrient Scarcity Ramps Up Recycling
One of the most studied triggers for autophagy-related signaling is reduced nutrient availability, such as fasting or calorie restriction. When energy is low, cells tend to activate AMPK (an energy sensor) and dampen mTOR (a nutrient-sensing growth pathway), which is commonly associated with increased autophagy signaling in many research models (Wang, S., et al., 2022).
What the evidence supports: Nutrient restriction promotes autophagy-related signaling in many experimental settings, though exact timing and measurable effects in humans can vary by tissue, baseline health, and the biomarkers used (Klionsky et al., 2021; Wang, S., et al., 2022).
U.S. health context: Intermittent fasting and time-restricted eating have become popular, and systematic reviews/meta-analyses continue to evaluate their relationship to weight and cardiometabolic outcomes (Guan et al., 2025; Harvard T.H. Chan School of Public Health, 2024).
Medicinal Mushrooms and Autophagy: Beyond Agaricus
While Agaricus blazei Murill (AbM) is frequently discussed for its bioactive polysaccharides and immune-relevant effects, other medicinal mushrooms are also being studied for how they may influence cellular stress responses and autophagy-related signaling (Hetland et al., 2011; Huang et al., 2022).
1) Agaricus blazei Murill (AbM): Immune & Stress Response
Recent studies highlight AbM’s role in influencing immune-relevant signaling:
· Mechanism: AbM-derived peptides have been reported to influence the PI3K/AKT/mTOR signaling pathway in macrophage cells, with outcomes interpreted as immune-supportive activity in that experimental context (Zou et al., 2025).
· Specific application: In periodontitis models, AbM polysaccharides were associated with modulation of inflammation and tissue outcomes alongside changes consistent with autophagy regulation via the H₂S/NRF2 axis (Yuan et al., 2023).
What’s known in humans: A Phase I clinical study evaluated Agaricus blazei as a dietary supplement in cancer patients in remission, contributing early human safety/tolerability information (Ohno et al., 2011). Additional preclinical work has explored AbM extracts in combination with anticancer therapies in cell-based models (Wang, D., et al., 2024).
2) Reishi (Ganoderma lucidum): Cellular Stress Pathways and Autophagy Markers
Reishi is widely researched for bioactive compounds (including triterpenoids and polysaccharides) and their potential influence on oxidative stress and mitochondrial pathways. In an MPTP-induced mouse model of parkinsonism, Ganoderma lucidum extract was associated with improved outcomes alongside findings involving oxidative stress, mitochondrial function, and markers related to autophagy and apoptosis (Ren et al., 2019).
Current clinical research (supportive care context): A Mayo Clinic Phase II study is evaluating reishi mushroom extracts for aromatase-inhibitor–related fatigue and/or arthralgias in breast cancer patients, compared with placebo (Mayo Clinic, n.d.).
3) Cordyceps: The Energy-Metabolism Angle (Cordycepin, AMPK)
Cordyceps contains cordycepin, a compound studied for potential effects on cellular energy signaling. Reviews describe cordycepin as biologically active and often discussed alongside AMPK, a pathway that integrates cellular energy status with autophagy-related regulation (Ashraf et al., 2020; Wang, S., et al., 2022). In experimental contexts, AMPK-linked signaling is also frequently discussed in relation to broader metabolic pathways, though specific health outcomes depend on study design and population (Ashraf et al., 2020; Guan et al., 2025).
Mushroom Species Comparison Table
|
Mushroom |
Example bioactive compounds (commonly discussed) |
Commonly discussed pathway links |
Primary research focus (broad) |
|
Agaricus blazei |
Polysaccharides / peptides |
PI3K/Akt/mTOR (cell studies) |
Immune signaling, inflammation models (Hetland et al., 2011; Zou et al., 2025) |
|
Reishi (Ganoderma lucidum) |
Triterpenoids / polysaccharides |
Oxidative stress, mitochondria, autophagy markers |
Neurobiology and cellular stress models (Ren et al., 2019) |
|
Cordyceps |
Cordycepin |
AMPK-linked energy signaling |
Energy & metabolic signaling (Ashraf et al., 2020; Wang, S., et al., 2022) |
Practical Takeaway: How to Use This Information
Mushroom supplements are increasingly viewed as “adjuncts” in integrative wellness routines. However, they should not replace foundational strategies that consistently support health:
· Consistent sleep: Supports normal metabolic and repair rhythms (general lifestyle principle).
· Regular exercise: Supports metabolic health and overall resilience (general lifestyle principle).
· Nutrient-dense diet: Provides building blocks needed for normal cellular maintenance and repair (general lifestyle principle).
If someone chooses to use medicinal mushrooms, a cautious, evidence-aligned approach is to use reputable products, avoid starting multiple new supplements at once, and consult a clinician—especially for people on complex medication regimens or under medical care (Ohno et al., 2011; Mayo Clinic, n.d.).
Frequently Asked Questions
What is autophagy in simple terms?
Autophagy is your cell’s built-in recycling system. It identifies and breaks down worn-out components, then reuses those materials for energy and repair (Klionsky et al., 2021).
Does fasting always trigger autophagy?
Fasting can promote autophagy-related signaling in many research models, often involving AMPK and mTOR pathways (Wang, S., et al., 2022). However, the exact timing and magnitude in humans can vary depending on individual factors and the tissues and biomarkers measured (Klionsky et al., 2021).
Do medicinal mushrooms increase autophagy?
Certain compounds in medicinal mushrooms have been shown to influence autophagy-related pathways in laboratory and animal studies (Ren et al., 2019; Yuan et al., 2023; Zou et al., 2025). While this research is still considered preclinical, it provides valuable insight into how these traditional foods may interact with cellular stress and recycling systems.
Importantly, autophagy is a highly regulated, multi-step process. In early research, scientists often measure biological “markers” that suggest autophagy signaling has been activated. However, these markers do not always confirm full autophagic flux — the complete cycle of cellular recycling from initiation to successful breakdown and reuse (Klionsky et al., 2021). Human studies specifically measuring full autophagic flux in response to medicinal mushrooms are still emerging.
That said, many widely accepted health practices — including exercise and calorie restriction — were first supported by mechanistic and preclinical research before long-term human outcome data became available. Medicinal mushrooms are being studied within that same research continuum.
For individuals interested in supporting overall cellular resilience, incorporating culinary or standardized mushroom preparations as part of a balanced, whole-food lifestyle may be a reasonable and conservative approach — particularly when used thoughtfully and under appropriate medical guidance. While we await more human clinical data, the existing mechanistic evidence helps explain why these mushrooms continue to be an area of active biomedical investigation.
Who should be cautious with mushroom supplements?
Individuals who are pregnant or breastfeeding, preparing for surgery, or taking anticoagulants, immunosuppressants, or cancer therapies should consult a clinician first. Clinical research protocols in supportive-care settings often include careful eligibility criteria and medication review, reflecting the importance of safety and interaction screening (Mayo Clinic, n.d.; Ohno et al., 2011).
References
- Ashraf, S. A., et al. (2020). Cordycepin for health and wellbeing: A potent bioactive metabolite of an entomopathogenic medicinal mushroom Cordyceps with therapeutic potential. Molecules, 25(12), 2735.
- Guan, Q., Mai, W., Qiu, Z., & Zuo, Y. (2025). Is time-restricted eating a healthy choice to lose weight? Investigating by qualitative analysis of Instagram posts and systematic reviews with meta-analysis. Digital Health, 11, 20552076251360911. https://doi.org/10.1177/20552076251360911
- Harvard T.H. Chan School of Public Health. (2024, June 26). Intermittent fasting may be effective for weight loss, cardiometabolic health. (Web resource).
- Hetland, G., et al. (2011). The mushroom Agaricus blazei Murill elicits medicinal effects on tumor, infection, allergy, and inflammation. Evidence-Based Complementary and Alternative Medicine.
- Huang, K., et al. (2022). Critical review on chemical compositions and health-promoting effects of mushroom Agaricus blazei Murill. Current Research in Food Science, 5, 2190–2203.
- Klionsky, D. J., et al. (2021). Guidelines for the use and interpretation of assays for monitoring autophagy (4th edition). Autophagy, 17(1), 1–382.
- Linder, B., & Kögel, D. (2019). Autophagy in cancer cell death. Biology, 8(4), 82.
- Mayo Clinic. (n.d.). Reishi mushroom for fatigue and/or arthralgias for patients with breast cancer on aromatase inhibitors (Clinical trial listing CLS-20555252). (Web resource).
- Nobel Prize. (2016). The Nobel Prize in Physiology or Medicine 2016 – Press release. (Web resource).
- Ohno, S., et al. (2011). Phase I clinical study of the dietary supplement, Agaricus blazei Murrill, in cancer patients in remission. Evidence-Based Complementary and Alternative Medicine.
- Ren, Z. L., Wang, C. D., Wang, T., Ding, H., Zhou, M., Yang, N., Liu, Y. Y., & Chan, P. (2019). Ganoderma lucidum extract ameliorates MPTP-induced parkinsonism and protects dopaminergic neurons from oxidative stress via regulating mitochondrial function, autophagy, and apoptosis. Acta Pharmacologica Sinica, 40(4), 441–450. https://doi.org/10.1038/s41401-018-0077-8
- Rollet, C. (2025, January 24). Retro Biosciences, backed by Sam Altman, is raising $1 billion to extend human lifespan. TechCrunch.
- Taylor, N. P. (2022, January 19). Altos bursts out of stealth with $3B, a dream team C-suite and a wildly ambitious plan to reverse disease. Fierce Biotech.
- Temkin, M. (2025, May 6). NewLimit, founded by Coinbase CEO Brian Armstrong, raises $130M to develop age-reversing treatments. TechCrunch.
- Wang, D., et al. (2024). Impact of Agaricus blazei Murill extract combined with imatinib treatment on leukemia cells. Journal of Food Biochemistry.
- Wang, S., et al. (2022). Role of AMPK in autophagy. Frontiers in Physiology, 13, 1015500.
- Yuan, W., et al. (2023). Agaricus blazei Murill polysaccharide attenuates periodontitis via H₂S/NRF2 axis. Molecular Nutrition & Food Research.
- Zou, X., et al. (2025). Identification of a novel peptide from Agaricus blazei Murill and its immune-enhancing activity. Foods, 14(20), 3467.