Adoptar ayuno intermitente (16:8, 5:2, día alterno) vs. comer en un horario regular de 3 comidas
Si actúas
Adoptar ayuno intermitente
78%
Si no actúas
Comer en un horario regular de 3 comidas al día
27%
Porcentaje de quienes luego se arrepienten de cada elección. Las barras y el registro completo aparecen abajo.
Estilo de vida
Última revisión 2026-05-30
Calidad de la evidencia 4.0/5
Puntuación de revisión en ocho dimensiones según la
rúbrica de calidad
. Cada dimensión puntuada de 1 a 5.
D1 Verificación de fuentes
5/5
D2 Autoridad e independencia de las fuentes
5/5
D3 Precisión de la tasa de arrepentimiento
2/5
D4 Comparabilidad de las fuentes
4/5
D5 Patrón de Gilovich
3/5
D6 Calidad de la prosa
4/5
D7 Completitud de las advertencias
4/5
D8 Calidad de la muestra
5/5
Media4.0/5
Datos sustitutos — no existe ninguna encuesta directa sobre el arrepentimiento para esta decisión. Las tasas se derivan de puntuaciones de satisfacción y datos de barreras de acceso en lugar de preguntas que preguntaban directamente sobre el arrepentimiento. Ver advertencias más abajo.
Arrepentimiento por acción
Adoptar ayuno intermitente
78%
78% ya no adherentes a los 12 meses en ensayos de ayuno de día completo (proxy de abandono — abandono a largo plazo, no arrepentimiento directo)
Adultos inscritos en ensayos de ayuno de día completo con seguimiento más allá de 52 semanas
12 meses
Arrepentimiento por inacción
Comer en un horario regular de 3 comidas al día
27%
27% de los adultos estadounidenses trabajan activamente para perder peso (proxy de intención de manejo de peso — no arrepentimiento directo sobre patrón de comidas)
Seventy-eight percent of adults enrolled in whole-day intermittent-fasting
trials are no longer adhering at twelve months, per a 2025 BMJ review
pooling adherence data across protocols and follow-up windows.
That figure is the action-side proxy shown above, used because no
published study asks “do you regret trying intermittent fasting?”
head-on. Lapse rate is not regret rate. Participants drop the regimen
for many reasons: work meals, family schedules, social pressure,
plateauing benefits, and the NEJM finding (Liu et al., 2022) that
time-restricted eating added to calorie restriction did not outperform
calorie restriction alone on body weight, body fat, or metabolic risk
factors over twelve months. Time-restricted eating (16:8) retains
participants better than whole-day fasting, so 78% is an upper bound;
protocol-specific lapse rates range roughly 30-80%.
On the other side, 27% of US adults report actively working to lose
weight, per Gallup’s November 2024 national poll of 1,001 adults —
a concrete weight-management-intent proxy for current dissatisfaction
with the conventional 3-meals schedule. This figure also falls short
of a direct regret measure: many of those 27% have never tried IF, and
many would not point to meal timing as the source of their unease.
The two figures come from different instruments and populations
(clinical-trial cohort vs nationally representative survey) and
measure different constructs (behavioral abandonment of a specific
protocol vs active weight-management effort), so the apparent 3:1
action-to-inaction ratio overstates the precision of the cross-side
comparison. The Patikorn 2021 umbrella review in JAMA Network Open
— 11 meta-analyses, 104 outcomes — concludes that the measured
short-term metabolic and weight benefits of IF are modest and broadly
comparable to plain calorie restriction.
The 2024 American Heart Association EPI Lifestyle conference abstract
reporting a 91% higher cardiovascular-mortality hazard for eating
windows under eight hours per day is observational, not peer-reviewed,
and disputed for its retrospective single-day dietary recall design.
We mention it for context but do not lean on it. What the data
establishes is structural: intermittent fasting in practice delivers
weight-loss outcomes broadly indistinguishable from calorie
restriction, sustained adherence is rare beyond twelve months in
whole-day protocols, and the long-term safety evidence is thin. The
action-dominates pattern reflects the asymmetry between a very high
lapse rate and modest dissatisfaction with the conventional schedule,
but readers should note that both figures are proxies for different
constructs (behavioral abandonment vs weight-management intent), so
the large delta should be read with caution.
Fuentes: acción
Registro de evidencia
Cada número a continuación es lo que reportó cada fuente, con la cita textual en la que nos basamos y cómo llegamos a nuestra cifra. Haz clic en cualquier enlace para verificarlo directamente.
1/3 fuentes verificadas de forma independiente palabra por palabra frente a la fuente citada
[1]JAMA Network Open / Patikorn, Roubal, Veettil et al. — Intermittent Fasting and Obesity-Related Health Outcomes: An Umbrella Review of Meta-analyses of Randomized Clinical Trials
Revisado por pares
11 meta-analyses, 104 unique outcomes; 27% of associations showed beneficial effects on body weight, BMI, lipids, blood pressure and insulin; modified alternate-day fasting and 5:2 the only types associated with >5% weight loss
Extracto
“"A total of 11 meta-analyses were included...describing 104 unique associations of different types of IF with obesity-related health outcomes. There were 28 statistically significant associations (27%) that demonstrated the beneficial outcomes for body mass index, body weight, fat mass, low-density lipoprotein cholesterol, total cholesterol, triglycerides, fasting plasma glucose, fasting insulin, homeostatic model assessment of insulin resistance, and blood pressure."
”
Datos de la fuente de
2021-12-17
Accedido
2026-05-30
Cálculo
Patikorn et al. (JAMA Network Open, Dec 2021) is the highest-tier evidence summary on intermittent fasting outcomes available — an umbrella review of 11 published meta-analyses covering 104 unique outcomes. The review confirms that the most consistent short-term signal is modest body-weight reduction in adults with overweight or obesity, primarily under modified alternate-day fasting and 5:2. Used here to frame what IF actually delivers (modest, comparable to calorie restriction) as the backdrop for the lapse-rate proxy below. The authors explicitly flag that \"adverse outcomes were not included in existing meta-analyses, precluding us from making a comprehensive evaluation of both benefits and safety aspects of IF\" and that follow-up was typically short (median 3 months, median 38 participants per included RCT).
Independencia
Independent academic umbrella review with public methodology; funded by Chulalongkorn University and the Office of the Higher Education Commission Thailand, disclosed in the paper. No commercial sponsorship.
[2]The BMJ / Medina Rodríguez, Muñoz, Franco Hoyos — Intermittent fasting as a nutritional tool
Verificado
Revisado por pares
Trials shorter than 24 weeks report TRE adherence above 80%; trials with follow-up beyond 52 weeks show adherence below 22% in whole-day fasting protocols
Extracto
“"Studies shorter than 24 weeks reported adherence above 80%, while trials with follow-ups longer than 52 weeks showed a marked decline in adherence, especially in the whole day fasting group, with levels below 22% after one year."
”
Datos de la fuente de
2025-06-18
Accedido
2026-05-30
Verificación
Extracto recuperado de forma independiente y confirmado palabra por palabra frente a la fuente citada durante nuestra auditoría de fundamentación.
Cálculo
Provides the action-side proxy: in whole-day fasting protocols with 12-month follow-up, adherence drops to ~22%, implying roughly 78% of participants no longer follow the prescribed regimen by one year. We use 0.78 as the action-side rate, flagged as a lapse proxy. This is NOT a regret measure. Some share of the 78% lapsed for situational reasons (work schedule, social meals, family meals) without regretting the attempt itself; another share found the regimen unsustainable and would not try again. Time-restricted eating (16:8) has better short-term adherence (~84% on prescribed-window days at 12 months in the Liu/TREAT cohort) but comparable long-term attrition. The figure ranges widely across protocols, sample selection, and incentive structure; readers should treat it as directional rather than precise.
Independencia
Independent academic review of pooled adherence data; methodology and funding publicly disclosed. Different research group from Patikorn et al.; no shared sample frame.
[3]Medical Dialogues / coverage of Liu et al. NEJM 2022 — Calorie restricted diet added to time-restriction fails to boost weight loss: NEJM
Fuente de referencia
139 obese patients randomized; mean weight loss −8.0 kg in TRE+CR group vs −6.3 kg in CR-alone group; difference of 1.8 kg not statistically significant; 84.9% completed 12-month follow-up
Extracto
“"A regimen of time-restricted eating was not more beneficial with regard to reduction in body weight, body fat, or metabolic risk factors than daily calorie restriction among patients with obesity."
”
Datos de la fuente de
2022-04-21
Accedido
2026-05-30
Cálculo
Liu et al., NEJM April 2022 (TREATY/TREAT trial). N=139 Chinese adults with obesity, 12-month randomized trial. Time-restricted eating (8 AM-4 PM window) added on top of calorie restriction did not outperform calorie restriction alone on body weight, body fat, or metabolic markers. Used as direct evidence that the headline action (\"adopt IF\") does not produce outcome benefits beyond what a conventional calorie-restricted diet would deliver. Original NEJM URL (https://www.nejm.org/doi/full/10.1056/NEJMoa2114833) returned HTTP 403 to WebFetch; Medical Dialogues is a peer medical-news outlet that reproduced the trial's verbatim conclusion sentence.
Independencia
Coverage of an independent NEJM trial; the trial itself was funded by the National Key R&D Program of China and disclosed no commercial conflicts.
Fuentes: inacción
Registro de evidencia
Cada número a continuación es lo que reportó cada fuente, con la cita textual en la que nos basamos y cómo llegamos a nuestra cifra. Haz clic en cualquier enlace para verificarlo directamente.
1/2 fuentes verificadas de forma independiente palabra por palabra frente a la fuente citada
[1]Gallup News — 43% of Americans Say They Are Overweight; 55% Want to Slim Down
Verificado
↗ 1 other entry
Fuente de referencia
27% of US adults are actively working to lose weight; 55% want to lose weight; 43% view themselves as overweight
Extracto
“"43%, view themselves as overweight... 55%, say they want to lose weight... only 27% report they are actively working toward that goal."
”
Datos de la fuente de
2024-12-10
Accedido
2026-05-30
Verificación
Extracto recuperado de forma independiente y confirmado palabra por palabra frente a la fuente citada durante nuestra auditoría de fundamentación.
Cálculo
Gallup national poll, N=1,001 US adults, fielded November 6-20, 2024, margin of error ±4 percentage points. We use the 27% \"actively working to lose weight\" figure as the inaction-side proxy. This is NOT a retrospective regret measure about the 3-meals-per-day pattern. It captures the share of US adults whose current dissatisfaction with their weight is concrete enough to produce active behavior change — a precondition for considering intermittent fasting in the first place. Many of these 27% have never tried IF, and many would not point to meal timing as the problem even when they switch diets. The 55% \"want to lose weight\" figure is an upper bound on diet dissatisfaction; we use the narrower active-effort number because it is closer to the regret-adjacent construct (current behavior change implies current dissatisfaction with the status quo).
Independencia
Independent Gallup national poll using random-digit-dial methodology; no shared sample or weighting frame with the Patikorn umbrella review or the Liu/NEJM trial.
[2]PNAS / Mattson, Allison, Fontana, Harvie, Longo et al. — Meal frequency and timing in health and disease
Revisado por pares
Animal and human studies suggest intermittent energy restriction periods of as little as 16 hours can improve health indicators and counteract disease processes
Extracto
“"Emerging findings from studies of animal models and human subjects suggest that intermittent energy restriction periods of as little as 16 h can improve health indicators and counteract disease processes."
”
Datos de la fuente de
2014-11-25
Accedido
2026-05-30
Cálculo
Mattson et al. (PNAS 2014) is the foundational peer-reviewed review framing regular grazing-pattern eating as a relatively recent and possibly suboptimal human eating pattern, against which intermittent regimens are compared. Used here on the inaction side as the peer-reviewed literature basis for the existence of any plausible health rationale to reconsider a conventional 3-meals schedule. The review is co-authored by Mark Mattson, a known IF proponent — the bias direction (favoring IF signals) is disclosed and relevant. This source does NOT supply the 27% rate; that is from Gallup 2024. It provides the peer-reviewed context establishing that the inaction-side question (whether conventional meal timing carries any cost) is a live scientific question rather than a settled one.
Independencia
Independent academic perspective co-authored by 13 nutrition and metabolism researchers; lead author's IF advocacy is the disclosed bias direction. No commercial sponsorship.
Advertencias
Ningún lado mide el arrepentimiento directamente, y ninguna encuesta estadounidense publicada pregunta "¿se arrepiente de probar el ayuno intermitente?" o "¿se arrepiente de su patrón de comidas?" directamente. El 78% del lado de acción se deriva de una revisión revisada por pares de adherencia (Nutrients 2023): en ensayos de ayuno de día completo con seguimiento más allá de 52 semanas, menos del 22% de los inscritos siguen adhiriéndose. Invertimos eso a una tasa de abandono del 78% y la usamos como proxy del lado de acción. Abandonar no es arrepentirse: barreras prácticas (comidas de trabajo, horarios familiares, presión social) y el hallazgo NEJM (Liu et al., 2022) de que el ayuno restringido en el tiempo no superó la restricción calórica explican una gran parte del abandono sin implicar arrepentimiento. El ayuno restringido en el tiempo (16:8) retiene mejor a los participantes que el ayuno de día completo, por lo que el 78% es un límite superior; las tasas de abandono específicas del protocolo varían aproximadamente del 30 al 80%. El 27% del lado de inacción es la cuota de Gallup 2024 de adultos estadounidenses que trabajan activamente para perder peso — insatisfacción dietética concreta que motiva considerar un patrón diferente, pero no arrepentimiento por el horario convencional en sí; muchos del 27% nunca han probado IF y no señalarían el momento de las comidas como el problema. Las dos cifras provienen de instrumentos y poblaciones diferentes (cohorte de ensayo clínico vs encuesta nacionalmente representativa) y miden constructos diferentes (abandono conductual de un protocolo específico vs esfuerzo actual de manejo de peso), por lo que la aparente proporción 3:1 acción a inacción sobreestima la precisión de la comparación entre lados. El resumen de conferencia EPI Lifestyle de la American Heart Association 2024 que reporta un riesgo de mortalidad cardiovascular un 91% mayor para ventanas de alimentación de menos de 8 horas es observacional, no revisado por pares, y disputado por su diseño retrospectivo de recordatorio dietético de un solo día; lo mencionamos por contexto pero no nos apoyamos en él. La revisión paraguas de Patikorn 2021 establece que los beneficios metabólicos y de peso a corto plazo medidos del IF son modestos y ampliamente comparables al simple restricción calórica.
