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Open research questions in Dietary Effects on Health

184 gap statements mined from Dietary Effects on Health papers in our 4.5M-paper local library, which holds 692 papers on the topic — drawn mostly from each paper's own stated research gap, future-work, challenge and limitation notes, and its abstract. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one.

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What the literature leaves open

  • There is a need for further long-term studies on the effects of prolonged fasting. The current lack of effective approved medications for MAFLD highlights the need for alternative therapeutic strategies.

    Intermittent fasting-induced autophagy normalization confers hepatic protection in metabolic dysfunction-associated fatty liver disease: Mechanistic insights and implications. · 2026 · DOI

  • Sedentary behavior is a significant risk factor for the development of chronic non-communicable diseases. The increasing trend of sedentary lifestyle is alarming. There is a lack of research specifically aimed at addressing real-time effects during uninterrupted sedentary sessions.

    [Traducción al español] Cambios agudos en variables metabólicas y cardiovasculares resultantes de la exposición al comportamiento sedentario: una revisión sistemática · 2026 · DOI

  • There is a lack of research specifically aimed at addressing real-time effects during uninterrupted sedentary sessions. The review highlights the need for standardized approaches and dose–response analyses to enhance understanding of the impacts of prolonged sedentary behavior on health and metabolism.

    [Traducción al español] Cambios agudos en variables metabólicas y cardiovasculares resultantes de la exposición al comportamiento sedentario: una revisión sistemática · 2026 · DOI

  • Critically, it must be emphasized that the evidence for reduced sexual desire derives almost exclusively from Ramadan fasting studies, and caution is warranted before extrapolating these findings to other IF protocols, such as TRE and ADF.

    Effects of Intermittent Fasting on Male and Female Reproductive Hormones, Fertility, and Sexual Function: A Comprehensive Review with Emphasis on the Existing Evidence Gap in Women · 2026 · DOI

  • The long-term effects of time-restricted feeding on healthspan and lifespan in mammals are unclear. The sex-specific effects of TRF on mammalian aging are not well understood. The impact of time-restricted feeding on behavioral rhythmicity, body weight and composition, frailty, and disease onset is not well characterized.

    Time-restricted feeding extends healthspan in both sexes and lifespan in male C57BL/6 J mice · 2026 · DOI

  • Supporting this, a scoping review of 19 RCTs found intermittent fasting reduced weight and visceral fat without excess muscle loss in adults ≥45 years, though data in those ≥70 years are scarce (65).

    Time-restricted eating versus calorie restriction for improving biomarkers of age in adults with overweight or obesity and incipient fatty liver disease: protocol for the ENSATI randomized controlled parallel groups trial · 2026 · DOI

  • There is a need for robust scientific studies on the medical implications of religious practices, particularly in the context of Ramadan fasting. The current literature lacks a comprehensive analysis of the health implications of Ramadan fasting in healthy individuals.

    Health Implications of Ramadan Fasting in Healthy and Eligible Individuals: A Narrative Review · 2026 · DOI

  • Limited research on ABSI in early elderly populations. Limited study of the impact of TRE on ABSI z-scores in overweight early elderly adults.

    Six-week time-restricted eating lowers premature mortality risk in overweight early elderly adults: Evidence from A Body Shape Index · 2026 · DOI

  • Further studies with larger sample sizes, extended follow-up periods, and optimised intervention protocols are required to confirm these findings. In particular, future research should aim to develop more feasible and sustainable intervention strategies in order to improve adherence and reduce attrition.

    Effects of Bee-Derived Products, Yoga, and Dietary Intervention on Metabolic Parameters in Patients with Type 2 Diabetes Mellitus · 2026 · DOI

  • However, little is known about the effects of these diets on mental health. So, the study aims to fill a significant gap in the literature by systematically comparing the effects of TRE (a fixed 8-h food intake window is chosen by the patient) with and without calorie restriction, alongside conventional calorie restriction, on multiple clinically relevant outcomes in obese patients with major depression disorder.

    Investigating the effect of intermittent fasting (time-restricted eating) with and without calorie restriction compared to calorie restriction on anthropometric parameters, depression score, and metabolic factors in patients with major depression disorder and obesity: a study protocol for a randomized controlled trial · 2026 · DOI

  • These findings support further investigation of diet-rhythm-inflammation features in LDH prognosis and suggest that immuno-metabolic and behavioral factors may be clinically relevant adjunctive targets.

    Synergistic impact of chrono-nutritional and pro-inflammatory dietary patterns on chronic pain recovery: a prospective cohort study with population-based corroboration · 2026 · DOI

  • Future prospective multicenter studies incorporating structured pre-Ramadan education, technology-assisted monitoring, AI-supported risk assessment systems, and DFU-specific fasting risk models are warranted to further improve fasting safety and individualized care in people with DFUs during Ramadan.

    Fasting with Diabetic Foot Ulcer (The SAFE-FAST Study): Study on Assessment and Fasting Eligibility for Individuals with Diabetic Foot Ulcer during Fasting in Ramadan · 2026 · DOI

  • The relationship between self-reported eating speed and long-term weight-history groups is unclear. Previous studies have focused primarily on obesity and single time-point measures of BMI. There is a need to understand the association between eating behaviors and long-term weight-history groups.

    Self-Reported Eating Speed Is Dose-Dependently and Bidirectionally Associated with Long-Term Underweight- and Obesity-Related Weight-History Groups · 2026 · DOI

  • BackgroundProlonged unsupplemented spiritual fasting (USF), complete caloric abstinence motivated by spiritual practice, is undertaken by many communities worldwide, yet its physiological consequences remain poorly characterized.

    Real-Time Glycaemic and Metabolic Adaptation During Unsupplemented Spiritual Fasting up to 30 Days: A Self-Controlled Observational Study · 2026 · DOI

  • There is a need for a comprehensive synthesis of all available data regarding the potential benefits of physical activity in preventing and managing metabolic syndrome. Prior work has not provided a clear understanding of the effects of physical activity on metabolic syndrome.

    Impact of Physical Activity and Exercise Modalities on Individual Components of Metabolic Syndrome: A Narrative Review · 2026 · DOI

  • They were compiled by the Centers for Medicare and Medicaid Services (CMS), and after deidentification were made available for researcher, known as the Limited Data Set (LDS).

    Elective arthroplasty on “high-risk” calendar dates: no evidence for worse outcomes in 43,000 procedures · 2026 · DOI

  • Future studies should explore additional approaches to individualized risk assessment before Ramadan fasting, including whether the quality and comprehensiveness of pre-Ramadan counseling are associated with a reduced risk of fasting-related complications.

    Ramadan fasting practices and acute complications among Arab children, adolescents, and young adults with diabetes: a cross-sectional survey · 2026 · DOI

  • The gut microbiota plays a crucial role in host metabolism and obesity pathogenesis, but the effects of short-term intensive fasting on gut microbiota are not well understood.

    The impact of short-term intensive fasting on physical health and gut microbiota in obese individuals · 2026 · DOI

  • The review highlights the need for further research on the application of Unani principles in preventive and integrative healthcare.

    Role of physiological evacuation in health preservation: a narrative review · 2026 · DOI

  • Future research should examine potential mechanisms underlying reductions in LOC eating and consider how psychoeducation on fasting behaviors may support wellbeing in this population.

    Eating Disorder Symptom Severity Decreases in Fasting Muslim Women in the United States During Ramadan: A Preliminary Longitudinal Study · 2026 · DOI

  • Accurately quantifying the impact of the Chinese Spring Festival on long-term glycemic control is methodologically challenging due to the biomarker’s 2-3 month reflection period.

    The impact of the traditional Chinese spring festival on glycemic control in a hospital population: a lag time-window analysis of 300,046 HbA1c tests · 2026 · DOI

  • Periodic caloric restriction stimulates BDNF production and improves neuronal stress tolerance to psychophysiological challenges. At the systemic level, IF orchestrates coordinated metabolic and endocrine adaptations to maintain cellular homeostasis.

    Nutritional timing and stress biology: intermittent fasting as a hormetic signal for adaptation · 2026 · DOI

  • Investigate the effects of TRF on other strains of mice, - Examine the effects of TRF on humans, - Determine the optimal duration and timing of TRF for maximizing health…

    Time-restricted feeding extends healthspan in both sexes and lifespan in male C57BL/6 J mice · 2026 · DOI

  • A key limitation of the present work is that CLOCK gene expression was measured at a single time-point and without parallel assessment of other core circadian regulators…

    Comparative neuroprotective and exercise capacity effects of prophylactic intermittent fasting and probiotics in sleep-deprived rats: insights into anti-inflammatory marker modulation and CLOCK gene regulation · 2026 · DOI

  • Current research often overlooks synergistic interactions within dietary patterns. Traditional biomechanical models often fail to adequately explain disparities in clinical outcomes.

    Synergistic impact of chrono-nutritional and pro-inflammatory dietary patterns on chronic pain recovery: a prospective cohort study with population-based corroboration · 2026 · DOI

Most-cited papers in Dietary Effects on Health

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Open questions raised by papers listed on this page include: (1) There is a need for further long-term studies on the effects of prolonged fasting (“Intermittent fasting-induced autophagy normalization confers hepatic protection…”, 2026); (2) There is a lack of research specifically aimed at addressing real-time effects during uninterrupted sedentary sessions (“[Traducción al español] Cambios agudos en variables metabólicas y…”, 2026); (3) The long-term effects of time-restricted feeding on healthspan and lifespan in mammals are unclear (“Time-restricted feeding extends healthspan in both sexes and lifespan in male…”, 2026); (4) There is a need for robust scientific studies on the medical implications of religious practices, particularly in the context of Ramadan fasting (“Health Implications of Ramadan Fasting in Healthy and Eligible Individuals: A…”, 2026); (5) Future research should aim to develop more feasible and sustainable intervention strategies in order to improve adherence and reduce attrition (“Effects of Bee-Derived Products, Yoga, and Dietary Intervention on Metabolic…”, 2026). 184 gap statements have been mined from Dietary Effects on Health papers in our 4.5M-paper local library, which holds 692 papers on the topic; the gaps come from whichever of those papers state one. They are mostly the research gaps the authors state and the papers' abstracts, plus future-work, limitations and challenges passages. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one, so you can read the original claim in context.

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