Science AI Journal
Medicine · Research topic

Open research questions in Nutritional Studies and Diet

1,157 gap statements mined from Nutritional Studies and Diet papers in our 7.9M-paper local library, which holds 4,643 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.

Choosing where to publish on Nutritional Studies and Diet? See the ranked Medicine journals.

What the literature leaves open

  • Cooking is a thermally driven, time-dependent, and largely irreversible process. The cooking process undergoes physicochemical transformations and may not fully reflect spatially nonuniform changes. The method needs to capture spatially nonuniform local changes while maintaining an integrated assessment of the overall cooking state.

    Temporal visual feature-guided cooking state detection for autonomous baking · 2026 · DOI

  • The current literature lacks specific information on the amino acids associated with elevated fasting glucose in children and adolescents. Prior studies have not used a combination of regression and machine learning techniques to examine this relationship.

    Dietary amino acid composition and elevated fasting glucose in children and adolescents from four Chinese provinces: a cross-sectional study combining regression and machine learning · 2026 · DOI

  • The evidence for the association between the Mediterranean diet and healthy ageing is limited by the fact that most of it is observational. The transferability of the evidence is limited by the populations in which it was generated, with most of the evidence coming from Mediterranean and other European settings.

    Mediterranean Diet and Multidimensional Healthy Ageing: A Narrative Review · 2026 · DOI

  • Evidence on physical fitness within isocaloric substitution frameworks remains limited. The relationships between protein consumption and physical fitness appear to depend on protein quality and dietary adequacy.

    Isocaloric substitution of plant-based for animal-based protein and physical fitness in adolescents: a cross-sectional study from the EHDLA study · 2026 · DOI

  • Lack of studies on the microbiota composition in raw drinking milk from vending machines. Need for improved monitoring and hygiene standards in raw milk vending machines. Limited understanding of the diversity of microbial populations in raw drinking milk.

    Microbiota Composition in Raw Drinking Milk from Vending Machines: A Case Study in Croatia · 2025 · DOI

  • The study had limitations in defining a common set of food groups valid and homogeneous across all the 16 cohorts. The study had to deal with the lack of standardization of measurement techniques in some countries, such as Hungary.

    Ancel Keys, the Mediterranean Diet, and the Seven Countries Study: A Review · 2025 · DOI

  • Food insecurity and limited access to healthcare and nutrition education exacerbate the risks of NCDs. The review highlights the need for context-specific, gender-responsive interventions to address the complex interplay between poor dietary quality and socioeconomic factors.

    Non-Communicable Disease Burden and Dietary Determinants in Women of Reproductive Age in Sub-Saharan Africa: A Scoping Review · 2025 · DOI

  • The study aims to address this gap by examining the differences in lifestyle factors and inflammation-related health outcomes between rural and peri-urban areas.

    Association Between Dietary Patterns and Lifestyle Habits with Vascular Inflammatory Responses in Individuals with Hypertension Living in PM2.5-Polluted Areas: A Cross-Sectional Pilot Study in Chiang Mai Province, Thailand · 2025 · DOI

  • The sample sizes for minority groups other than non-Hispanic black and Hispanic/Mexican Americans were small. There is a need to consider confounding variables in the data analysis.

    Dietary Fiber Intake Was Inversely Associated with All-Cause Mortality but Not with Cancer and Cardiovascular Disease Mortalities in the US · 2025 · DOI

  • Little is known about how underserved men with PCa and their families perceive barriers to dietary change, including adaptation of the cardioprotective Mediterranean diet (MD).

    Determining Barriers to Dietary Change Among Medically Underserved Men With Prostate Cancer · 2026 · DOI

  • Despite the established benefits of dietary fibre for cardiovascular health, it remains unclear whether and how dietary fibre intake, particularly from specific food sources, influences all-cause and cause-specific mortality in populations with established cardiovascular disease (CVD).

    Inadequate Dietary Fibre Intake in Cardiovascular Disease Populations and Its Adverse Impact on Metabolic Health and Longevity: A National Retrospective Cohort Study · 2026 · DOI

  • The impact of new antiobesity medications, including GLP-1 receptor agonists, on choline requirements also warrants investigation.

    Choline and metabolic health, a missing link in a critical chain · 2026 · DOI

  • The paper notes that previous studies have generated several peer-reviewed publications examining dietary behaviors and metabolic health indicators, but the current study is the first to evaluate this specific association.

    The association between adapted dietary index for gut microbiota and carotid intima-media thickness among overweight or obese children and adolescents · 2026 · DOI

  • Prior studies have investigated the association between Korean dietary patterns and heavy metals, but this study provides new insights.

    Association of Dietary Patterns with Blood Heavy Metal Concentrations: Results from the Korean National Health and Nutrition Examination Survey 2012–2016 · 2025 · DOI

  • The definition of a common set of food groups valid and homogeneous across all the 16 cohorts was limited to 19 groups. Some important details were missing, such as the distinction between bread and cereals rich or poor in fiber, fresh versus dry fruit, red meat versus other types of meat, fat fish versus lean fish, whole milk versus skim milk, fat versus lean dairy products, and olive oils versus other oils.

    Ancel Keys, the Mediterranean Diet, and the Seven Countries Study: A Review · 2025 · DOI

  • Investigating the effects of image patch size and the number of encoder-decoder layers, - Exploring the application of the proposed model to other food types and cooking methods, - Further evaluation of the model's performance on larger…

    Temporal visual feature-guided cooking state detection for autonomous baking · 2026 · DOI

  • The study identifies a gap in understanding the association between dietary diversity score and incident peptic ulcer in Chinese older adults. The study aims to fill this gap by examining the association using a prospective cohort design.

    Dietary diversity score and incident peptic ulcer in Chinese older adults: a prospective cohort study · 2026 · DOI

  • Investigate the relationship between protein source and physical fitness in longitudinal studies, - Examine the effects of different protein sources on physical fitness in various populations, - Explore the role of the protein food matrix in physical fitness…

    Isocaloric substitution of plant-based for animal-based protein and physical fitness in adolescents: a cross-sectional study from the EHDLA study · 2026 · DOI

  • The study used self-reported exercise frequency and duration for PA assessment, - The study used a cross-sectional design, - The evidence for an interaction effect between the MIND diet score and PA remains inconclusive, - The study lacked objective PA…

    Mediterranean-DASH intervention for neurodegenerative delay diet adherence, physical activity, and cognitive function among community-dwelling older adults · 2026 · DOI

  • Future studies using objective PA measures are needed to clarify the association between the MIND diet score and cognitive function, - Randomized evidence is needed to confirm the findings, - Longitudinal studies are needed to examine the temporal relationship between the MIND diet score and cognitive…

    Mediterranean-DASH intervention for neurodegenerative delay diet adherence, physical activity, and cognitive function among community-dwelling older adults · 2026 · DOI

  • Greater harmonisation of food classifications, reference periods, scoring procedures, and reporting standards is needed - A standardised, validated precision dietary diversity indicator has yet…

    Dietary diversity indicators: evolution, measurement, and interpretative challenges · 2026 · DOI

  • Future research should consider the use of alternative dietary assessment tools, such as 24 h dietary recall methods - It will be necessary to conduct long-term research targeting environmentally vulnerable groups such as pregnant women and infants - Future studies should consider including cacao and chocolate…

    Association of Dietary Patterns with Blood Heavy Metal Concentrations: Results from the Korean National Health and Nutrition Examination Survey 2012–2016 · 2025 · DOI

  • The review was not registered with PROSPERO, - The search was limited to studies published between January 2010 and May 2025, - The review only included studies that addressed dietary determinants of NCDs among women of reproductive age…

    Non-Communicable Disease Burden and Dietary Determinants in Women of Reproductive Age in Sub-Saharan Africa: A Scoping Review · 2025 · DOI

  • Further studies should investigate the causal relationships between dietary patterns and vascular inflammation, - Longitudinal studies could provide more insight into the effects of lifestyle factors on vascular health, - Research on the mechanisms underlying the associations between sugar intake and vascular inflammation…

    Association Between Dietary Patterns and Lifestyle Habits with Vascular Inflammatory Responses in Individuals with Hypertension Living in PM2.5-Polluted Areas: A Cross-Sectional Pilot Study in Chiang Mai Province, Thailand · 2025 · DOI

  • Further studies are needed to evaluate the molecular pathways that determine the association between excessive weight and colorectal cancer incidence, - Further studies are needed to evaluate whether weight loss between PCa survivors presents clear advantages regarding PCa recurrence, - Studies are necessary to understand the relationship between obesity and other malignant…

    Healthy Lifestyle and Cancer Risk: Modifiable Risk Factors to Prevent Cancer · 2024 · DOI

Most-cited papers in Nutritional Studies and Diet

Most recent work

Find a gap in your own Nutritional Studies and Diet sub-topic

This page shows what the Nutritional Studies and Diet literature already flags as unresolved. To narrow it to your specific question, search the Research Gap Finder: the search is free with a free account and lists the papers closest to your topic first. Unlocking that topic (50 credits, charged once) fills the comparison table from our 7.9M-paper local library and writes the gaps from its rows.

Open the Research Gap Finder →

Related topics in Medicine

Artificial Intelligence in Healthcare and Education
4,200 open questions
Dementia and Cognitive Impairment Research
2,789 open questions
Substance Abuse Treatment and Outcomes
2,285 open questions
Cancer Immunotherapy and Biomarkers
2,273 open questions
Liver Disease Diagnosis and Treatment
2,102 open questions
Sports Performance and Training
1,952 open questions
Parkinson's Disease Mechanisms and Treatments
1,915 open questions
Mosquito-borne diseases and control
1,849 open questions
Open questions raised by papers listed on this page include: (1) Evidence on physical fitness within isocaloric substitution frameworks remains limited (“Isocaloric substitution of plant-based for animal-based protein and physical…”, 2026); (2) Little is known about how underserved men with PCa and their families perceive barriers to dietary change, including adaptation of the cardioprotective Mediterranean diet (MD) (“Determining Barriers to Dietary Change Among Medically Underserved Men With…”, 2026); (3) Lack of studies on the microbiota composition in raw drinking milk from vending machines (“Microbiota Composition in Raw Drinking Milk from Vending Machines: A Case Study…”, 2025); (4) The study had to deal with the lack of standardization of measurement techniques in some countries, such as Hungary (“Ancel Keys, the Mediterranean Diet, and the Seven Countries Study: A Review”, 2025); (5) There is a need to consider confounding variables in the data analysis (“Dietary Fiber Intake Was Inversely Associated with All-Cause Mortality but Not…”, 2025). 1,157 gap statements have been mined from Nutritional Studies and Diet papers in our 7.9M-paper local library, which holds 4,643 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.

Tools for your next paper

Gaps & Literature SearchFind open questions in any field — 1,100,000+ open gaps mined from our own library.Pre-CheckIs your paper ready? Acceptance odds for top, mid and open/emerging journals, in seconds.Journal FinderA ranked shortlist of target journals from a 17,500-venue index.Duplicate Publication CheckerCheck for prior publication across 7 sources and our local library.Citation GeneratorFreeA DOI or title → APA, MLA, Vancouver, Chicago, BibTeX, RIS. No signup.Graphical Abstract MakerFreeTurn your findings into a colorblind-safe graphical abstract.

How Pre-Check worksHow AI Review works

Compare the category — Honest roundups of the AI research tools, ours listed alongside the alternatives.

Command palette

Jump anywhere, run any action.