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. This is an editorial piece on ageing science, not medical advice. Senolytic drugs are experimental. Don’t take prescription drugs or high-dose supplements for this purpose without your doctor’s supervision. 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 is not connected to this research and is not a treatment for any condition.
Some cells in your body are, in a sense, undead. They’ve stopped dividing, but they won’t die off either. Instead they hang around, leaking inflammatory signals that can damage the healthy tissue around them. Scientists call them senescent cells. The media calls them “zombie cells”.
A few senescent cells are normal and even useful. The problem is that they build up as we age, and a growing body of research suggests they actively contribute to many age-related problems — from stiff joints to weaker muscles to slower healing.
That has made them one of the most exciting areas of ageing research. Here’s what’s known, what’s still speculation, and what you can sensibly do today.
Key takeaways
- Senescent cells have permanently stopped dividing but resist normal cell death.
- They release a mix of inflammatory signals known as the SASP.
- They accumulate with age and are one of the recognised hallmarks of ageing.
- In mouse studies, clearing senescent cells improved healthspan and extended median lifespan.
- Senolytic drugs are in early human trials; they are not proven anti-ageing treatments.
What is a senescent cell?
Most cells in your body divide to replace themselves. When a cell suffers serious damage — DNA damage, very short telomeres, oxidative stress or activated cancer genes — it can hit an emergency brake and enter senescence: a permanent stop on dividing.
That’s a smart defence. A damaged cell that stops dividing can’t turn into a tumour. Senescent cells also play helpful roles in wound healing and in development before birth. Normally, once they’ve done their job, the immune system clears them away.
Why are senescent cells a problem?
With age, the immune system becomes less efficient at clearing them, and more cells are being pushed into senescence. So they build up in tissues like skin, fat, liver, muscle and joints.
Senescent cells aren’t quiet. They release a cocktail of inflammatory molecules, growth factors and enzymes called the senescence-associated secretory phenotype, or SASP. That contributes to chronic low-grade inflammation (sometimes called “inflammaging”), can push neighbouring cells into senescence too, and may disrupt stem cell niches that repair tissue. It’s one of the hallmarks described in the hallmarks of ageing.
What did the mouse studies show?
Researchers at the Mayo Clinic genetically engineered mice so their senescent cells could be selectively removed with a drug. In studies published in Nature in 2011 and 2016, clearing these cells delayed several age-related problems, including cataracts and muscle loss, and in the later study extended median lifespan.
It was a landmark result, because it suggested senescent cells aren’t just a marker of ageing but an active driver of it. It kicked off a wave of research into drugs that could do the same thing without genetic engineering.
What are senolytics?
Senolytics are compounds designed to selectively kill senescent cells while leaving healthy cells alone. The most studied combination is dasatinib, a cancer drug, with quercetin, a plant compound found in onions and apples. Another is fisetin, found in strawberries.
Small early human trials have looked at conditions like lung fibrosis, diabetic kidney disease and frailty. Results so far are mixed and preliminary. None of these is an approved anti-ageing treatment, and dasatinib in particular is a serious prescription drug with side effects.
Researchers are also studying “senomorphics”, which aim to calm the SASP without killing the cells, and immune-based approaches to help the body clear them.
What can you do now?
The honest answer is: the basics, which also happen to be well proven for many other reasons.
- Exercise regularly. Research suggests exercise may reduce markers of cellular senescence in older adults. Combine strength training and aerobic work.
- Keep body fat in check. Excess fat, especially visceral fat, is a hotspot for senescent cells.
- Don’t smoke. Smoking drives DNA damage that pushes cells into senescence.
- Sleep well. Poor sleep is linked with markers of accelerated biological ageing.
- Eat plenty of plants. Fruit and vegetables contain compounds like quercetin and fisetin in food amounts, along with fibre.
Unexciting, but these habits limit the damage that pushes cells into senescence in the first place. See how to support stem cells naturally.
What mistakes should you avoid?
- Self-prescribing senolytics. Online protocols for dasatinib are risky without medical supervision.
- Believing supplement marketing. High-dose fisetin and quercetin products far outrun the human evidence.
- Ignoring the boring stuff. Exercise and fat loss have more evidence than any pill.
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Join free →What do I focus on?
The basics: lifting every second day, 10,000+ steps, protein supported by PerfectAmino, sleep, cold plunge and sauna, and monthly Hume Body Pod scans to keep an eye on body fat and visceral fat. The Operator Standard keeps me consistent with all of it.
Where does X39 fit?
X39 has no connection to senescence research and doesn’t remove senescent cells. I wear it daily as a separate general-wellness habit: 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.
Shop X39 at my LifeWave store →
Frequently asked questions
What are senescent cells?
Cells that have permanently stopped dividing but don’t die off, instead releasing inflammatory signals that can affect surrounding tissue.
Why are they called zombie cells?
Because they’re no longer functioning normally but refuse to die, and they can harm the healthy cells around them.
Do senolytics work in humans?
Early trials are under way with mixed, preliminary results. There are no approved senolytic anti-ageing treatments.
Does exercise reduce senescent cells?
Some research suggests regular exercise may reduce markers of senescence, which is one more reason to keep training as you age.
Should I take fisetin or quercetin supplements?
Human evidence is limited. Speak to your doctor before taking high-dose supplements, especially if you take other medication.
Does X39 remove senescent cells?
No. 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 treatment for any condition.
Related reading
Hallmarks of Ageing Explained · Autophagy Explained · Telomere Length · Why Men Age Faster Than Women · Visceral Fat · Support Stem Cells Naturally
Full disclosure. This article is for general information and is not medical advice. 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 the Operator Standard, PerfectAmino and Hume Health are affiliate links, and I may earn a commission at no extra cost to you.
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