Clinical nutritionist Lee Holmes has outlined a strategy for individuals to 'spring clean' their bodies by reducing exposure to pesticides found on fruits and vegetables. She explains that persistent pesticides can accumulate in the body, contributing to chronic inflammation and accelerating cellular aging, a process known as inflammaging.

Holmes notes that in her clinical practice, clients experiencing fatigue, brain fog, and inflamed skin often have diets rich in conventionally grown produce. She describes pesticides as xenobiotics, foreign chemicals that trigger an immune response when encountered regularly, leading to chronic low-grade inflammation. This sustained immune activation can disrupt digestive bacteria, alert the nervous system, and impede healing.

Data from the Environmental Working Group (EWG) in 2026 indicated that pesticides were detected on 96 percent of 'Dirty Dozen' produce samples, with over 203 total pesticides identified. Notably, this year's research also highlighted the presence of PFAS, or 'forever chemicals,' on 63 percent of contaminated foods. These chemicals do not break down and can accumulate in the body.

Zombie Cells and Senolytics

Holmes also discusses 'zombie cells,' or senescent cells, which are non-functioning cells that refuse to die and continuously release inflammatory signals, accelerating aging. She has observed patients in their 40s exhibiting cellular profiles of individuals in their 60s, attributing this to factors including pesticide residues. These zombie cells can damage mitochondria, shorten telomeres, and contribute to diseases such as heart disease, diabetes, Alzheimer's, and arthritis.

The link between pesticides and zombie cells is direct, as each chemical identified as a threat can induce cellular stress. Cells unable to recover from this stress may become senescent. However, Holmes points to diet as a source of natural compounds called senolytics, which can help clear these zombie cells. Ironically, many of the most pesticide-laden foods are also rich in senolytic compounds, such as fisetin, quercetin, curcumin, resveratrol, and EGCG.

Fisetin, found in strawberries, apples, and onions, selectively removes senescent cells. Quercetin, present in capers, red onions, berries, and green tea, acts as a potent anti-inflammatory. Curcumin, from turmeric, can cross the blood-brain barrier and protect neurological cells. Resveratrol, found in red grapes, blueberries, and dark chocolate, activates longevity pathways. EGCG in green tea clears zombie cells and protects new ones.

Resolving Inflammation and Choosing Produce Wisely

Beyond clearing zombie cells, the body needs to actively resolve inflammation. Holmes explains that specialized pro-resolving mediators (SPMs), derived from omega-3 fatty acids found in fatty fish like salmon, mackerel, and sardines, signal the immune system to stand down, acting as a reset button for the inflammatory system.

While Australia does not publish its own 'Dirty Dozen' list, the EWG data remains relevant due to global farming practices. Produce with thin skins and leafy greens are particularly susceptible to pesticide absorption. Australia's 'Dirty Dozen' for prioritizing organic purchases include strawberries, spinach, kale, silverbeet, apples, blueberries, blackberries, potatoes, capsicum, hot capsicum and chillies, green beans, pears, and nectarines.

Conversely, the 'Clean 15,' which have natural protective barriers or fewer pest pressures and are considered safer to buy conventionally, include avocados, sweet corn, pineapples, papaya, onions, frozen sweet peas, asparagus, cabbage, cauliflower, watermelon, mangoes, bananas, carrots, mushrooms, and kiwi.

Building a Cellular Spring Clean Routine

Holmes suggests a phased approach to dietary changes. Starting with the top five pesticide-laden organic items—strawberries, spinach, kale, apples, and blueberries—can significantly shift cellular burden. Shopping seasonally can make organic produce more affordable, and freezing or preserving at lower prices is recommended. Prioritizing organic versions of senolytic-rich foods offers greater cellular benefit. Incorporating SPM-boosters like tinned sardines and making turmeric a daily habit are also key interventions.

Beyond Diet

Holmes emphasizes that a comprehensive cellular spring clean also involves nervous system regulation and sleep quality. Chronic stress can accelerate senescent cell formation, while practices like breathwork and journaling can help. Gut diversity, aiming for 30 different plant foods weekly, supports beneficial bacteria that calm the immune response. Crucially, sufficient sleep is essential for cellular cleanup, as senescent cells proliferate during sleep deprivation.

Ultimately, Holmes advises focusing on crowding out inflammatory foods by filling plates with senolytic-rich, pesticide-free options. This approach, combined with conscious choices, reduces inflammatory load and senescent cell burden over time, promoting cellular health and reversing inflammaging. Eat to Heal by Lee Holmes is published by Rockpool Publishing.