New “flicker stage” claim challenges steady model of aging — but scientists warn evidence is mixed
Claims that aging includes a reversible “flicker stage” by Stuart Kaplan and Marcus Riley have limited independent verification; mainstream science discusses related retinal measures and promising cellular rejuvenation research, but evidence for the seven-stage model remains mixed.
- Authors claim: Kaplan and Riley describe a seven-stage aging model featuring a reversible “flicker stage” where functional age can briefly shift younger or older.
- Verification gap: Independent searches found no publisher, ISBN, media coverage or peer-reviewed validation for the book Your Aging Advantage or the seven-stage model.
- Different uses of “flicker”: Scientific literature uses flicker modulation thresholds (FMT) in vision research, not a psychological life-stage model.
- Biology advances: Laboratory work on cellular rejuvenation and epigenetic reprogramming suggests some cellular markers of aging may be reversible, but clinical applications remain experimental (cellular rejuvenation and epigenetic reprogramming research overview, Life Biosciences, commentary on possible reversibility of aging from a Harvard scientist).
What Kaplan and Riley say about the “flicker stage”
Overview: According to materials provided by the authors, Stuart Kaplan and Marcus Riley frame aging as a fluid, seven-stage process in their account Your Aging Advantage. They single out a so-called “flicker stage” in which a person’s functional or “feels-like” age can temporarily shift younger or older.
Flicker triggers: The authors list physical, psychological, social and environmental events — for example, renewed exercise or social connection — as “flicker triggers” that can reset one’s felt pace. Kaplan compares lived age to a weather report: chronological age is like the date, while felt age is like the weather.
“Healthier aging involves ‘flickering back to a younger state,’” Riley is quoted saying. “Those shifts aren’t permanent. Through positive interventions, we have the ability to flicker back to the stage of age we want to be in.”
Verification gaps and reporting note
This report attempted independent confirmation of the book Your Aging Advantage and the authors Stuart Kaplan and Marcus Riley. Public searches and databases produced no publisher listings, ISBN records, author biographies, media coverage, or peer-reviewed studies tied to a seven-stage framework as of this report. Because these materials could not be located, the Kaplan/Riley claims remain unverified and should be treated as emerging or self-published ideas rather than established science.
Reporting note: This article presents what the authors claim while clearly flagging the lack of independent verification. Readers should distinguish between reported claims and verified scientific findings.
How mainstream science frames aging: different uses of “flicker” and new lab advances
The word “flicker” appears in scientific literature, but typically in a technical sensory context rather than as a psychological life stage. Separately, rapid advances in cellular biology are fueling research into whether some biological markers of aging can be slowed or partially reversed.
Flicker modulation thresholds (FMT)
Vision science uses flicker modulation thresholds (FMT) as an objective measure of retinal and neural response to flickering light. FMTs can change with age and serve as a measurable biomarker of sensory aging — a different meaning than the behavioral “flicker stage” described by Kaplan and Riley.
Cellular rejuvenation and epigenetic reprogramming
Laboratory work on cellular rejuvenation — including partial epigenetic reprogramming — has restored youthful function in some cell types in animal models. Overviews and primary reports (see cellular rejuvenation and epigenetic reprogramming research overview and the company Life Biosciences) indicate active interest, while commentary from a Harvard scientist argues aging could become reversible in the future (Harvard scientist commentary). These advances address molecular and cellular markers and are not equivalent to instantaneous changes in lived experience.
Practical overlap and policy implications
Common ground: Despite conceptual differences, Kaplan/Riley’s practical advice overlaps with mainstream public-health recommendations: physical activity, social connection, stress management and sleep are repeatedly associated with better mobility, cognition and longer disability-free life.
Conservative policy alignment: For a moderate conservative audience, emphasis on personal responsibility, community ties, and purposeful work aligns with pragmatic aging policy that supports older adults who want to remain productive while protecting workers unable to continue in demanding roles.
Implications for California
Economic impact: California’s workforce and high cost of living make questions about functional age and employment salient. If more residents “age on pace,” the state could gain tax revenue and consumer spending, and employers may need flexible hours, phased retirement, and retraining programs.
Health systems: Demand for preventive services, community fitness and age-friendly care could rise. Investing in community health workers, chronic-disease prevention and programs that reduce isolation could support interventions aligned with “flicker triggers.”
Policy considerations: Policymakers might revisit eligibility ages, workforce retraining, and employer incentives while maintaining protections for workers in physically demanding jobs.
Practical applications for residents
- Prioritize regular physical activity and healthy diets.
- Maintain social ties and community engagement to reduce isolation.
- Manage stress, sleep, and chronic conditions to support functional vitality.
- Employers and local governments can enable flexible work, accessible recreation, and community centers.
Sources and further reading
- Flicker modulation thresholds and aging (vision research)
- Cellular rejuvenation and epigenetic reprogramming research overview
- Life Biosciences — company overview of aging research
- Commentary on possible reversibility of aging from a Harvard scientist
Reporting note
This article preserves claims about the flicker stage and the book Your Aging Advantage as provided by the authors. Independent searches for the book, the purported authors (Stuart Kaplan and Marcus Riley), and peer-reviewed validation of a seven-stage model did not yield confirmatory records. Where peer-reviewed or institutional sources exist, they are cited above. Treat the Kaplan/Riley framework as unverified and distinct from the experimental cellular research described in the cited scientific literature.
