Affiliate & partner disclosure: This article contains affiliate links, and I may earn a commission if you buy through them at no extra cost to you. As an authorised LifeWave Brand Partner, I have a financial interest in promoting LifeWave products. Testimonial/editorial given by a LifeWave brand partner with financial interest in promoting the product. Full disclosure at the end.
A note before we start. Everything below about hematopoietic stem cells is general science education — it is not about any product, and nothing here describes a treatment, cure, or fix for any condition. Where LifeWave X39 is mentioned, it is a non-transdermal, general-wellness phototherapy patch that gently stimulates the skin with light to support the body’s natural energy flow for strength and stamina. It is not a drug, not a stem cell product, and not a treatment for any disease.
What are hematopoietic stem cells and why do they matter after 40?
Every day your body produces hundreds of billions of new blood cells. Every one of them originates from hematopoietic stem cells (HSCs) — a small population of master cells deep inside your bone marrow. HSCs are the foundation of your blood and immune system, producing red blood cells for oxygen transport, white blood cells for immune defence, and platelets for clotting. When HSCs function well, your immune system is responsive and your body recovers efficiently from illness. Their function changes steadily with age.
I’m Dave, I’m 50. HSCs are the most clinically studied stem cells in the body, yet most men have never heard of them. Understanding them connects several dots — from why infections can hit harder later in life to why exercise, sleep, and nutrition matter at a deeper level.
Key takeaways
- Hematopoietic stem cells in bone marrow produce every blood cell type.
- With age, HSCs show lineage skewing: more myeloid cells (innate immunity), fewer lymphoid cells (adaptive immunity).
- That skewing is part of immunosenescence — the age-related decline in immune function.
- Exercise, sleep, good nutrition and managing inflammation support the marrow environment.
- HSC decline is part of stem cell exhaustion, a hallmark of ageing.
How do hematopoietic stem cells work?
HSCs live in specialised niches in the bone marrow — mainly the pelvis, sternum, vertebrae, and the ends of long bones. They are largely quiescent, dividing rarely to protect their DNA. When the body needs new blood cells (after blood loss, during infection), HSCs activate and produce progenitor cells that expand along two lineages: myeloid (red cells, platelets, monocytes, granulocytes) and lymphoid (T cells, B cells, natural killer cells). A single HSC can, in principle, rebuild the whole blood system — which is why bone marrow transplants work.
How do hematopoietic stem cells age?
Three main changes. First, lineage skewing: older HSCs favour myeloid over lymphoid output, weakening targeted responses to new pathogens and reducing vaccine responses. Second, clonal dominance: a small number of HSC clones can come to dominate the marrow. This is called clonal hematopoiesis of indeterminate potential (CHIP) and is associated with higher cardiovascular risk and blood cancer risk. Third, reduced functional quality: HSC numbers may rise with age, but each cell tends to work less well as DNA damage accumulates and niche signalling deteriorates.
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Join free →What supports hematopoietic stem cell function?
Exercise temporarily mobilises stem and progenitor cells into circulation, supports healthier immune profiles in older adults, and helps reduce the chronic inflammation that drives skewing.
Fasting has shown striking effects in mice: prolonged fasting cycles promoted renewal of the blood system. Human evidence is limited, and prolonged fasting needs medical supervision.
Good nutrition matters for the huge daily production demand: iron, B12, folate, copper and zinc are direct inputs, along with adequate protein. I get mine from food plus ten PerfectAmino tablets a day.
Managing chronic inflammation protects the bone marrow niche from the signalling linked to skewing and clonal dominance.
My week at 50: lifting every second day, 10,000+ steps a day, cold plunge, sauna and steam most days, and omega-3 and vitamin D daily.
Where does X39 fit? Separately from everything above, I wear an X39 patch daily as a general-wellness habit. LifeWave X39 is a non-transdermal, general-wellness phototherapy patch that gently stimulates the skin with light to support the body’s natural energy flow for strength and stamina. It contains no drugs and is not a treatment for blood disorders, immune problems, or any condition discussed above. The science in this article is educational and is not a claim about the patch.
As an authorised LifeWave Brand Partner I have a financial interest in promoting it.
Shop X39 at my LifeWave store →
Frequently asked questions
What are hematopoietic stem cells?
The master cells in your bone marrow that produce every type of blood cell: red cells, white cells, and platelets.
What is lineage skewing?
As HSCs age, they produce more myeloid cells and fewer lymphoid cells (like T and B cells), weakening the immune response to new threats.
What is CHIP?
Clonal hematopoiesis of indeterminate potential — when a few HSC clones dominate the marrow. It becomes more common with age and is associated with higher cardiovascular and blood cancer risk.
Does exercise affect blood stem cells?
Exercise temporarily mobilises stem and progenitor cells and is associated with healthier immune ageing.
Can fasting rejuvenate the blood system?
Mouse research suggests prolonged fasting can promote blood system renewal. Human evidence is still emerging.
Does X39 affect blood stem cells?
No such claim is made. X39 is a non-transdermal, general-wellness phototherapy patch that gently stimulates the skin with light to support the body’s natural energy flow for strength and stamina. It is not a drug or treatment for any condition.
Related reading
What Are Stem Cells? · Stem Cell Exhaustion After 50 · Stem Cells and Inflammation · Fasting and Stem Cell Regeneration · Exercise and Stem Cells · Can You Measure Your Stem Cells?
Full disclosure. This article is general wellness education and is not medical advice, diagnosis, or treatment. LifeWave X39 is a non-transdermal, general-wellness phototherapy patch and is not intended to diagnose, treat, cure, or prevent any disease. As an authorised LifeWave Brand Partner, I have a financial interest in promoting LifeWave products. Links to PerfectAmino are affiliate links. Always consult a qualified professional about your individual health.
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