Hormesis: Harnessing Beneficial Stress for Healthy Aging

Aging is a natural process, but science shows that how we age can be influenced by certain choices and habits. One of the most exciting ideas in this area is called hormesis. This concept explains how a little bit of stress on the body—the right kind at the right dose—can actually make us healthier and help us live longer. Hormesis helps our bodies get stronger and better at protecting themselves, especially as we age.

What is Hormesis?

Hormesis is a biological phenomenon where low doses of a harmful agent or stressor produce beneficial effects. In simple terms, what doesn’t kill you can make you stronger—if the dose is low enough. This happens because the body reacts to small stress by activating repair and defense systems. These systems make our cells tougher and more efficient. For example, a little bit of heat, cold, or fasting stresses the body in a good way, triggering processes that help us stay healthy (1).

How Hormesis Helps Fight Aging

As we age, our cells become less efficient at repairing damage and dealing with stress. Hormesis works by stimulating protective mechanisms in our cells. These include:

• Antioxidant defense systems: Low-level stress can activate pathways like Nrf2, which increases the production of antioxidant enzymes that clean up harmful molecules called free radicals (2)
• Mitochondrial health: Mitochondria are the power plants of our cells. Mild stress can boost their function and even help make new mitochondria, improving energy and slowing aging (1) 
• Autophagy: This is the process of cleaning out damaged cell parts. Hormesis triggers autophagy, keeping cells clean and working properly (3).

Natural Ways to Use Hormesis for Healthy Aging

Several natural habits use the principle of hormesis to improve our health. Here are some examples:

1. Intermittent Fasting and Caloric Restriction: Eating less or going for periods without food causes mild stress to the body. This activates repair pathways and improves insulin sensitivity, which may slow aging and prevent diseases (4)
2. Exercise: Physical activity puts the body under controlled stress. Regular moderate exercise increases our ability to handle oxidative stress and improves mitochondrial function, which helps us age better (5).
3. Heat and Cold Exposure: Going into a sauna or taking a cold shower can activate protective stress responses. Heat stimulates proteins that repair damaged cells, while cold improves fat metabolism and reduces inflammation (6).
4. Plant-Based Compounds (Phytochemicals): Certain foods contain mild toxins that trigger the body’s defense systems. Examples include curcumin from turmeric, resveratrol from grapes, and sulforaphane from broccoli. These compounds stimulate antioxidant and detox pathways (7).

Medications That Mimic Hormesis

Some drugs also work by creating small amounts of stress in the body, which can trigger protective processes:

• Metformin: Commonly used to treat diabetes, metformin causes a mild energy stress in cells. This activates AMPK, a key protein involved in longevity and metabolism (8)
• Rapamycin: ​Rapamycin, a well-known inhibitor of the mechanistic target of rapamycin (mTOR) pathway, exhibits hormetic properties that may contribute to its potential anti-aging effects (9).

Supplements That Stimulate Hormesis

Some natural supplements can mimic hormetic stress and activate protective responses in the body:

• Berberine: A plant compound found in herbs like Berberis, berberine induces mild oxidative stress and activates AMPK and Nrf2 pathways, leading to hormetic benefits (10).
• Quercetin: This flavonoid found in onions and apples has been proposed to have hormetic effects and induces a mild stress that boosts antioxidant enzyme levels and promotes cellular resilience (11).
• Mild ozone therapy and low-dose radiation have also been proposed as non-conventional hormetic interventions, though these remain controversial and require more clinical evidence (12) (13).

Conclusion

The idea of hormesis gives us hope that we can age better by using smart, manageable amounts of stress to train our bodies to be stronger and more resilient. Simple habits like fasting, exercising, using saunas, and eating certain plants and can all help activate these healthy responses. Some medications, herbs and supplements may also provide similar benefits. As research continues, using hormesis may become a key part of how we prevent disease and live longer, healthier lives.

References

1. Ristow, M., & Zarse, K. (2010). How increased oxidative stress promotes longevity and metabolic health: The concept of mitochondrial hormesis (mitohormesis). Experimental gerontology, 45(6), 410–418. https://doi.org/10.1016/j.exger.2010.03.014
2. Calabrese, V., Cornelius, C., Dinkova-Kostova, A. T., Iavicoli, I., Di Paola, R., Koverech, A., Cuzzocrea, S., Rizzarelli, E., & Calabrese, E. J. (2012). Cellular stress responses, hormetic phytochemicals and vitagenes in aging and longevity. Biochimica et biophysica acta, 1822(5), 753–783. https://doi.org/10.1016/j.bbadis.2011.11.002
3. Maiuri, M. C., & Kroemer, G. (2015). Autophagy in stress and disease. Cell death and differentiation, 22(3), 365–366. https://doi.org/10.1038/cdd.2014.236
4. Longo, V. D., & Panda, S. (2016). Fasting, Circadian Rhythms, and Time-Restricted Feeding in Healthy Lifespan. Cell metabolism, 23(6), 1048–1059. https://doi.org/10.1016/j.cmet.2016.06.001
5. Radak, Z., Chung, H. Y., & Goto, S. (2008). Systemic adaptation to oxidative challenge induced by regular exercise. Free radical biology & medicine, 44(2), 153–159. https://doi.org/10.1016/j.freeradbiomed.2007.01.029
6. Patrick, R. P., & Johnson, T. L. (2021). Sauna use as a lifestyle practice to extend healthspan. Experimental gerontology, 154, 111509. https://doi.org/10.1016/j.exger.2021.111509
7. Son, T. G., Camandola, S., & Mattson, M. P. (2008). Hormetic dietary phytochemicals. Neuromolecular medicine, 10(4), 236–246. https://doi.org/10.1007/s12017-008-8037-y
8. De Haes, W., Frooninckx, L., Van Assche, R., Smolders, A., Depuydt, G., Billen, J., Braeckman, B. P., Schoofs, L., & Temmerman, L. (2014). Metformin promotes lifespan through mitohormesis via the peroxiredoxin PRDX-2. Proceedings of the National Academy of Sciences of the United States of America, 111(24), E2501–E2509. https://doi.org/10.1073/pnas.1321776111
9. Moore M. N. (2020). Lysosomes, Autophagy, and Hormesis in Cell Physiology, Pathology, and Age-Related Disease. Dose-response : a publication of International Hormesis Society, 18(3), 1559325820934227. https://doi.org/10.1177/1559325820934227
10. Zhu, X., Wei, Y., Yang, B., Yin, X., & Guo, X. (2020). The mitohormetic response as part of the cytoprotection mechanism of berberine : Berberine induces mitohormesis and mechanisms. Molecular medicine (Cambridge, Mass.), 26(1), 10. https://doi.org/10.1186/s10020-020-0136-8
11. Calabrese, E. J., Hayes, A. W., Pressman, P., Dhawan, G., Kapoor, R., Agathokleous, E., & Calabrese, V. (2024). Quercetin induces its chemoprotective effects via hormesis. Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association, 184, 114419. https://doi.org/10.1016/j.fct.2023.114419
12. Bocci, V. A., Zanardi, I., & Travagli, V. (2011). Ozone acting on human blood yields a hormetic dose-response relationship. Journal of translational medicine, 9, 66. https://doi.org/10.1186/1479-5876-9-66
13. Chirumbolo, S., Tirelli, U., Franzini, M., Pandolfi, S., Ricevuti, G., Vaiano, F., & Valdenassi, L. (2023). Ozone in the adjunct medical treatment. The round personality of a molecule with hormetic properties. Human & experimental toxicology, 42, 9603271231218926. https://doi.org/10.1177/09603271231218926