Introduction
How to increase stem cells naturally has become one of the most searched questions in longevity science. Adult stem cells are the reserve populations your body uses to repair and replace worn tissue. Many people past midlife notice that injuries heal slower and recovery takes longer than they once did. Changing stem cell function is part of that picture. Much of what circulates online comes from clinics selling injections rather than from published science. This article explains what adult stem cells are, what genuinely changes with age, and which daily habits the peer-reviewed evidence supports.
What Are Adult Stem Cells, and Why Do They Matter?
Adult stem cells, also called somatic stem cells, are undifferentiated cells that live inside mature tissue throughout your body.
They differ from embryonic stem cells in one important respect. Adult stem cells are multipotent (i.e., able to become a limited range of cell types) rather than pluripotent.
You carry them in your bone marrow, the lining of your gut, your muscle, your skin, and parts of your brain.
Each population holds two responsibilities. It renews itself, and it produces the specialized cells that its tissue needs.
Researchers describe adult stem cells as maintaining tissue through routine turnover and repairing tissue after injury (Rando et al., 2025).
When these populations work well, repair keeps pace with daily wear. When they falter, the whole process slows.
Do Stem Cells Decline With Age? A More Careful Answer
Ask whether stem cells decline with age and you will usually get a simple yes. The accurate answer requires a distinction that most articles skip.
What falls reliably is function and not always number.
In blood-forming stem cells, the count can actually rise with age while regenerative capacity drops (Brunet et al., 2023).
Scientific reviews describe aged stem cells as losing self-renewal capacity, drifting toward biased differentiation, and accumulating cellular damage (Rando et al., 2025).
So chasing a bigger number misses the target. Quality of function matters more than raw quantity.
This distinction is the first thing I raise when someone asks me how to increase stem cells naturally. The habits worth adopting support function, not merely headcount.
Stem Cells and Exercise: The Strongest Human Evidence
Among every lever available, the connection between stem cells and exercise rests on the largest body of human data.
A systematic review and meta-analysis pooled trials measuring stem and progenitor cells before and after a single exercise session (Schmid et al., 2021). Circulating numbers rose significantly within minutes and stayed elevated for roughly half an hour.
I want to be precise about what that finding means. Exercise mobilizes these cells out of the bone marrow and into the bloodstream.
Mobilization is not the same as manufacturing new cells. What exercise appears to do is move existing reserves into circulation, where they can reach tissue that needs repair.
Both aerobic work and resistance training show this effect. Trials in this area have tested treadmill sessions, stationary cycling, and high-intensity intervals.
Anyone asking how to increase stem cells naturally should begin here. Consistency turns a transient response into a lasting pattern, so most days beats occasional intensity.
Fasting, Foods That Increase Stem Cells, and the Diet Question
Diet occupies the second tier of evidence, and the foods that increase stem cells deserve a careful hearing rather than a confident sales pitch.
The most striking work involves fasting. A twenty-four hour fast improved intestinal stem cell function in both young and old animals (Mihaylova et al., 2018).
The mechanism was a metabolic switch. Cells shifted from burning carbohydrate to burning fat, and their regenerative capacity roughly doubled.
I have to flag the limits plainly. That research was conducted in mice, and human trials on fasting and stem cell function remain thin.
Later work added a caution worth knowing. Regeneration surges during the refeeding period after a fast, and in animal models that same surge raised tumor risk.
So I do not tell people to fast aggressively in pursuit of stem cell benefit. The science here is promising and unsettled at the same time.
On the food side, the pattern is more familiar. Eating patterns loaded with added sugars (monosaccharides or disaccharides) and heavily processed products track with worse cellular function and higher inflammation.
Polyphenol-rich plants sit at the other end of that spectrum. Berries, leafy greens, cocoa, green tea, and turmeric supply compounds that researchers keep returning to. This whole-food principle is why I formulated Daily Brain Care around plant-derived ingredients, including aloe polysaccharides and inositol hexaphosphate from stabilized rice bran. Two of those polyphenols, EGCG from green tea and curcumin from turmeric, are also the basis of my EGCG and Curcumin products that utilize natural phospholipids to enhance their bioavailability and absorption.
Nutrition belongs in any serious discussion of how to increase stem cells naturally. It supports the environment in which these cells operate, which is a real contribution even without a dramatic headline.
Why Sleep Belongs Near the Top of the List
Sleep receives far less attention than exercise in this conversation, and the research suggests that ranking is a mistake.
A study published in the Journal of Experimental Medicine examined sleep and blood-forming stem cells in both mice and people (McAlpine et al., 2022).
Fourteen healthy adults completed six weeks of adequate sleep and six weeks of mild restriction, losing roughly ninety minutes each night.
Restricted sleep raised the number of circulating stem and progenitor cells. That result sounds like a benefit until you read further.
The same restriction altered the epigenetic programming of those cells, pushed them toward inflammatory output, and reduced the diversity of the population.
Here is the lesson I draw from that paper. More cells in circulation are not automatically better.
Poor sleep drove the population to turn over faster and grow less varied, which the authors connected to accelerated aging of the blood system.
Any honest account of how to increase stem cells naturally has to include that correction. Protecting seven to nine hours is one of the few levers supported by direct human data, and chronic stress works against the same system.
Stem Cell Supplements: What They Can and Cannot Do
Search this subject and you will find stem cell supplements marketed with remarkable confidence. I want to give you the plain facts instead.
No oral supplement delivers living stem cells into your tissue. Cells taken by mouth do not survive digestion, and no capsule relocates them to where repair is needed.
Products labeled as stem cell activators generally supply nutrients and plant compounds rather than cells.
That is not automatically a criticism. Good nutrition genuinely supports the cellular environment in which adult stem cells function.
Readers often ask me how to boost stem cells naturally without any supplement at all. My honest answer is that the lifestyle levers do most of the work.
The fair question is whether a particular formula has real evidence behind it. Most do not. Ingredients such as N-acetyl cysteine earn their place through documented mechanisms, not through marketing language.
So when readers ask me about stem cell supplements, I steer the conversation back to how to increase stem cells naturally through daily habits. Then I point to whatever published research exists, including my own.
What My Own Clinical Research Measured
Honesty obliges me to describe my own research precisely, including the boundaries of what it established.
Before Daily Brain Care carried that name, the same formulation went through clinical study as APMC. The abbreviation stands for aloe polymannose multinutrient complex.
Over twelve months, my colleagues and I followed older adults taking that formula. We reported the findings in the Journal of Alzheimer’s Disease (Lewis et al., 2013). Blood draws taken before the first dose and after the final month let us profile a wide panel of immune cell populations.
One result stood out. A population of monocyte-lineage cells carrying the CD14 marker increased significantly over the twelve months.
Why does that matter in a discussion of adult stem cells? Separate work in the Proceedings of the National Academy of Sciences supplies the link. Researchers in that paper identified a subset of human blood monocytes that behaves as adult pluripotent stem cells (Zhao et al., 2003).
Those cells carry CD14 alongside the stem cell markers CD34 and CD45. Researchers induced them to become macrophages, epithelial cells, endothelial cells, neurons, and liver cells.
So the cell population that rose in our trial belongs to the lineage that other researchers have identified as containing progenitor cells with pluripotent properties.
I will not overstate the connection. Our trial measured total CD14 cells rather than the specific stem cell subset that the PNAS group characterized.
The design was open-label, carried no placebo group, and enrolled a small sample of adults living with dementia. Nothing in that design permits a claim about treating, curing, or preventing any disease, and I make none.
What the trial does establish is narrower and still uncommon. Peer-reviewed clinical research has examined the Daily Brain Care formulation directly, which sets it apart from most products on the shelf. You can read how that work shaped the company on the Dr Lewis Nutrition About page.
Conclusion
The evidence on adult stem cells points toward habits rather than shortcuts. Train most days of the week, since exercise carries the strongest human evidence. Build meals around whole plant foods that carry plenty of polyphenols. Guard your sleep and keep stress in check because both shape how these cells behave. Treat supplement marketing with skepticism and ask what has actually been published. To add a whole-food formula backed by peer-reviewed research to that foundation, order Daily Brain Care today.
Frequently Asked Questions
What are adult stem cells?
Adult stem cells, also called somatic stem cells, are undifferentiated cells within mature tissue. They renew themselves and produce the specialized cells their tissue requires for repair.
Do stem cells decline with age?
Function declines reliably with age, though the number does not always fall. In blood-forming stem cells, counts can rise even as regenerative capacity drops.
How can I increase stem cells naturally?
Learning how to increase stem cells naturally starts with regular exercise, which has the strongest human evidence. Quality sleep, a polyphenol-rich diet, and stress management also support cellular function.
What foods increase stem cells?
Polyphenol-rich plants are the most studied, including berries, leafy greens, cocoa, green tea, and turmeric. Added sugar and heavily processed products pull in the opposite direction.
Do stem cell supplements work?
No oral product delivers living stem cells, since cells cannot survive digestion. What a formula can offer is nutritional support for the environment these cells occupy.
References
Brunet, A., Goodell, M. A., & Rando, T. A. (2023). Ageing and rejuvenation of tissue stem cells and their niches. Nature Reviews Molecular Cell Biology, 24(1), 45–62. https://doi.org/10.1038/s41580-022-00510-w
Lewis, J. E., McDaniel, H. R., Agronin, M. E., Loewenstein, D. A., Riveros, J., Mestre, R., Martinez, M., Colina, N., Abreu, D., Konefal, J., Woolger, J. M., & Ali, K. H. (2013). The effect of an aloe polymannose multinutrient complex on cognitive and immune functioning in Alzheimer’s disease. Journal of Alzheimer’s Disease, 33(2), 393–406. https://doi.org/10.3233/JAD-2012-121381
McAlpine, C. S., Kiss, M. G., Zuraikat, F. M., Cheek, D., Schiroli, G., Amatullah, H., Huynh, P., Bhatti, M. Z., Wong, L.-P., Yates, A. G., Poller, W. C., Mindur, J. E., Chan, C. T., Janssen, H., Downey, J., Singh, S., Sadreyev, R. I., Nahrendorf, M., Jeffrey, K. L., … Swirski, F. K. (2022). Sleep exerts lasting effects on hematopoietic stem cell function and diversity. Journal of Experimental Medicine, 219(11), e20220081. https://doi.org/10.1084/jem.20220081
Mihaylova, M. M., Cheng, C.-W., Cao, A. Q., Tripathi, S., Mana, M. D., Bauer-Rowe, K. E., Abu-Remaileh, M., Clavain, L., Erdemir, A., Lewis, C. A., Freinkman, E., Dickey, A. S., La Spada, A. R., Huang, Y., Bell, G. W., Deshpande, V., Carmeliet, P., Katajisto, P., Sabatini, D. M., & Yilmaz, Ö. H. (2018). Fasting activates fatty acid oxidation to enhance intestinal stem cell function during homeostasis and aging. Cell Stem Cell, 22(5), 769–778.e4. https://doi.org/10.1016/j.stem.2018.04.001
Rando, T. A., Brunet, A., & Goodell, M. A. (2025). Hallmarks of stem cell aging. Cell Stem Cell, 32(7), 1038–1054. https://doi.org/10.1016/j.stem.2025.06.004
Schmid, M., Kröpfl, J. M., & Spengler, C. M. (2021). Changes in circulating stem and progenitor cell numbers following acute exercise in healthy human subjects: A systematic review and meta-analysis. Stem Cell Reviews and Reports, 17(4), 1091–1120. https://doi.org/10.1007/s12015-020-10105-7
Zhao, Y., Glesne, D., & Huberman, E. (2003). A human peripheral blood monocyte-derived subset acts as pluripotent stem cells. Proceedings of the National Academy of Sciences, 100(5), 2426–2431. https://doi.org/10.1073/pnas.0536882100
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Consult a qualified healthcare professional before beginning any supplementation program.
