You Don’t Have to Be Perfect
Many of us feel, especially when we get “bad” or sub‑optimal test results—several red flags in our DNA360 report, blood work from the doctor, the number on the scale, or how we feel in our clothes—that there is nothing meaningful we can do in the short term. It can seem as if it would take years of extreme, all-or-nothing effort to move the needle. The work by Fitzgerald and colleagues directly challenges that belief. In just eight weeks, using everyday nutrition and lifestyle tools, participants showed measurable shifts in biological age, suggesting that change does not need to be perfect or austere to be powerful.
In their randomized pilot trial of 43 healthy men aged 50–72, those assigned to an 8‑week, methylation supportive diet and lifestyle program ended the study an average of 3.23 years biologically “younger” than men who did not change their habits, based on a well-established DNA methylation (epigenetic) clock. Within the treatment group, men were about 2.04 years younger at the end of the program than at their own baseline—after only two months. In a companion case series of six women aged 46–65 following a highly similar program, five of six reduced their biological age by between roughly 1 and 11 years, with an average biological age reduction of 4.60 years. Together, these findings show that a relatively simple, time-limited lifestyle program was associated with meaningful, biologically measurable shifts in both men and women.
The Horvath Clock: A window into biological age
The Horvath clock is a laboratory tool that estimates a person’s biological age by looking at DNA methylation patterns—small chemical tags on DNA that tend to change in predictable ways as we get older. It was trained on many different tissues and cell types, which is why it is often called a “multi‑tissue” or “pan‑tissue” clock, and research has shown that it can track age‑related risk better than calendar years alone. This is the same type of epigenetic clock used in the studies described above and is one of the core biological age measurements included in The DNA Company’s DNAging Premium test, allowing these kinds of changes in biological age to be measured and monitored over time.
Epigenetic flexibility in action
Rather than being fixed, DNA methylation patterns shift dynamically in response to diet, stress, sleep, and environment. The Fitzgerald trials prove we can influence these marks in weeks — not decades — using tools that fit real life.
Designed for real life, not perfection
Crucially, this program was designed to be practical, not perfect. It centered on a plant‑forward, nutrient‑dense way of eating (lots of colorful vegetables, some eggs and liver, nuts and seeds, modest animal protein), regular physical activity, 7+ hours of sleep, and brief breathing exercises to reduce stress, plus a probiotic and a concentrated fruit‑and‑vegetable powder. Organic foods were encouraged when feasible but not required; participants did not need an all-organic kitchen or boutique wellness budget to benefit. And they were not perfectly adherent. In the women’s series, average adherence to the various goals ranged from about 72% to just under 100%, with some elements—like the breathing exercises—being particularly challenging, yet even with this very human, imperfect follow‑through, biological age still shifted in a favorable direction.
What the science really tells us
These are small studies, and that matters: the trial and the case series involve modest numbers of people, short time frames, and specific age ranges. They do not prove that everyone will see the same results, nor do they yet tell us exactly how long these changes last or how they translate into disease risk over decades. But they offer a powerful, hopeful takeaway that patients can use right now: do not sacrifice the good for the perfect. You do not need flawless adherence, extreme diets, or years of waiting to begin influencing how your body ages. With accessible changes to food, movement, sleep, and stress—done most of the time, not all the time—you can start to shift biology in weeks, even if your genes or your last set of lab results made you feel stuck.
Imperfect action trumps perfect inaction
Average biological age reversal of 3–4+ years across both sexes in only eight weeks, with real-world adherence as low as ~70%. That’s a paradigm shift: small, consistent changes accumulate fast when they target methylation support.
DNA Company update: SOD2 correction
Other DNA Company news: there was a crossed wire in how SOD2 was presented. The A allele had been tagged as optimal when, in fact, it is suboptimal. This has now been corrected in the system, and all reports have been automatically updated to reflect the accurate classification.
References
Fitzgerald KN, Hodges R, Hanes D, et al. Potential reversal of epigenetic age using a diet and lifestyle intervention: a pilot randomized clinical trial. Aging (Albany NY). 2021;13(7):9419‑9432. doi:10.18632/aging.202913. Updated analysis and correction in: Aging (Albany NY). 2024;16(5):4943‑4945.
Fitzgerald KN, Campbell T, Makarem S, Hodges R. Potential reversal of biological age in women following an 8‑week methylation supportive diet and lifestyle program: a case series. Aging (Albany NY). 2023;15(6):1833‑1839. doi:10.18632/aging.204602.
*These statements have not been evaluated by the FDA. DNA tests and lifestyle programs are for informational and educational purposes.