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Open research questions in Diet and metabolism studies

578 gap statements mined from Diet and metabolism studies papers in our 7.9M-paper local library, which holds 2,056 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 Diet and metabolism studies? See the ranked Medicine journals.

What the literature leaves open

  • There is a lack of understanding of the molecular mechanisms linking obesity to liver dysfunction. Traditional biochemical and gene expression analyses have limitations in capturing the full complexity of protein dynamics. There is a need for novel therapeutic strategies to combat obesity-related disorders.

    Anti-Obesity and Hepatoprotective Effects of Probiotic Goat Milk in Mice: Insights from Hepatic Proteomics · 2025 · DOI

  • There is a need for new alternatives to treat type 2 diabetes, overweight, and obesity. The nutritional aspects of diets have not been fully explored for their benefits in improving human health.

    The Effects of a Dietary Intervention with a Synbiotic Beverage on Women with Type 2 Diabetes, Overweight, or Obesity · 2025 · DOI

  • The paper identifies the challenge of inconsistent insulin administration and lack of ketone monitoring in young adults with type 1 diabetes. The review highlights the challenge of lifestyle changes and the need for comprehensive patient education. The paper notes the challenge of balancing the potential benefits and risks of the ketogenic diet in this population.

    Diabetic Ketoacidosis in Young Adults with Type 1 Diabetes: The Impact of the Ketogenic Diet—A Narrative Literature Review · 2025 · DOI

  • There is a lack of clarity on the safety and appropriateness of the ketogenic diet for individuals with type 1 diabetes. There is a need for careful evaluation and monitoring of the ketogenic diet in young adults with type 1 diabetes. The paper identifies the need for ongoing research to clarify whether the ketogenic diet can be safely integrated into diabetes management in this population.

    Diabetic Ketoacidosis in Young Adults with Type 1 Diabetes: The Impact of the Ketogenic Diet—A Narrative Literature Review · 2025 · DOI

  • The review highlights the need for further research on the mechanisms through which prebiotics exert their effects. The paper mentions the challenge of producing prebiotics, such as galactooligosaccharides, through biotechnological technologies.

    The Role of Prebiotics in Modulating Gut Microbiota: Implications for Human Health · 2024 · DOI

  • One challenge is the complexity of the gut-brain axis and its regulation. Another challenge is the variability in individual responses to polyphenols and probiotics. The paper also identifies the need for further research on the use of Hericium erinaceus and Coriolus versicolor as prebiotics in humans.

    Hormetic Nutrition and Redox Regulation in Gut–Brain Axis Disorders · 2024 · DOI

  • The relationship between depression, antidepressant treatment, and weight change is not fully understood. There is a need to summarize the mechanisms linked to depression and antidepressant therapy in the context of weight change.

    Mechanisms Involved in the Link between Depression, Antidepressant Treatment, and Associated Weight Change · 2024 · DOI

  • The mechanisms of probiotics in regulating gut microbiota require more research. The impact of Bifidobacterium breve BBr60 on gut microbiome and metabolome in overweight or obese adults is not well understood. The study aims to fill this gap by investigating the effect of BBr60 on gut microbiome and metabolome.

    Gut Microbiome and Metabolome Alterations in Overweight or Obese Adult Population after Weight-Loss Bifidobacterium breve BBr60 Intervention: A Randomized Controlled Trial · 2024 · DOI

  • The relationship between mild ketosis and metabolic syndrome (MetS) remains unclear.

    Mild ketosis, metabolic syndrome and genetic–lifestyle interactions in the UK Biobank · 2026 · DOI

  • Ketogenic diets are increasingly used for weight management and metabolic improvement, but it remains unclear whether nutritional ketosis induces uniform adaptation across metabolic phenotypes and sex.

    Metabolic and hormonal responses to nutritional ketosis across metabolic phenotypes and sex in adults · 2026 · DOI

  • Although preclinical studies have revealed that a ketogenic diet or a mix of ketone supplements reduces alcohol intake and alleviates withdrawal symptoms, the impact of BHB supplements on alcohol-related responses remains to be defined.

    Ketone Supplements and Alcohol‐Related Responses in Rodents · 2025 · DOI

  • Medium-chain triglycerides (MCTs) exert antiobesity effects; however, whether these antiobesity effects are observed when the MCT/long-chain triglyceride intake is altered using a high-fat diet (30 kcal% fat) remains unclear.

    Defective medium-chain fatty acid β-oxidation in the liver alters the fat preference and induces hepatic steatosis and glucose intolerance · 2025 · DOI

  • There is scarce research focusing on the relationship between the low-carbohydrate dietary score and the development of a metabolically unhealthy phenotype.

    Low-carbohydrate dietary score and the incidence of metabolically unhealthy phenotype based on BMI status: a cohort study · 2024 · DOI

  • Ketone esters (KEs) are compounds that induce ketosis without dietary changes, but KEs have not been studied in an older adult population.

    Daily consumption of ketone ester, bis-octanoyl (R)-1,3-butanediol, is safe and tolerable in healthy older adults in a randomized, parallel arm, double-blind, placebo-controlled, pilot study · 2024 · DOI

  • Future studies ought to focus on large-scale multicenter randomized clinical trials incorporating standardized dietary approaches, metabolic profiling, and molecularly defined stratification.

    Efficacy and safety of ketogenic diet in glioblastoma: an updated systematic review and meta-analysis · 2026 · DOI

  • One challenge is the severely restricted food selection in ketogenic diets, which may lead to inadequate micronutrient intake. Another challenge is the need for careful food selection and nutritional therapy support to avoid potential nutrient gaps. The study also highlights the challenge of achieving adequate micronutrient coverage, especially in higher ketogenic ratios.

    Critical Nutrients in Ketogenic Diets for Infants and Children Under Ten Years of Age—A Hypothetical Study · 2026 · DOI

  • There is limited data on the micronutrient intake of infants and children on ketogenic diets. The study aims to address this gap by analyzing nutrient coverage in optimized meal plans. It examines the effect of different ketogenic ratios on micronutrient intake.

    Critical Nutrients in Ketogenic Diets for Infants and Children Under Ten Years of Age—A Hypothetical Study · 2026 · DOI

  • BackgroundThe ketogenic diet is being explored as an adjuvant intervention in breast cancer because it lowers circulating glucose and elevates ketone bodies such as {beta}-hydroxybutyrate (BHB), but how individual ER+ breast cancer subtypes adapt to these conditions remains poorly characterized.

    β-Hydroxybutyrate elicits divergent metabolic responses between MCF-7 and T47D ER+ breast cancer cells under glucose restriction · 2026 · DOI

  • The study highlighted the need for further research on the effectiveness of nutritional interventions in Alzheimer's disease.

    Intervenções nutricionais na doença de Alzheimer · 2026 · DOI

  • Further research is needed to fully understand the potential benefits and limitations of the ketogenic diet in adults with anorexia nervosa. Studies with larger sample sizes and longer follow-up periods are needed. Research on the underlying genetic factors associated with response to KT is needed.

    Symptom impact and safety of ketogenic therapy in adults with anorexia nervosa: a feasibility trial · 2026 · DOI

  • Preliminary benefits observed in patient-reported motor experiences were paradoxically limited to the MCT-supplemented MeDi, in which ketosis was not reliably achieved.

    A randomized safety and feasibility crossover trial of two Mediterranean-ketogenic interventions in individuals with Parkinson's disease · 2026 · DOI

  • J Strength Cond Res XX(X): 000-000, 2026-Few studies have examined the relationship between ketones and anaerobic neuromuscular performance, especially maximal strength and explosive power.

    Exogenous Ketones Preserve Rate of Force Development in Young Adults · 2026 · DOI

  • The study had a relatively small sample size (67 patients). The study was limited to hospitalized stroke patients and may not be generalizable to other populations.

    Macronutrient deficiency is significantly negatively associated with increased catabolism: a study of UUN in stroke patients · 2026 · DOI

  • The sample size was limited to 51 women, - The study had an attrition of 11 women, - The study only included women between 30 and 50 years old with overweight, obesity…

    The Effects of a Dietary Intervention with a Synbiotic Beverage on Women with Type 2 Diabetes, Overweight, or Obesity · 2025 · DOI

  • Further studies are needed to investigate the effects of hormetic nutrition on human health, - Research on the role of epigenomics and nutrition in gut-brain axis disorders is necessary, - Investigations on the synergistic effects of different nutritional mushrooms and probiotics…

    Hormetic Nutrition and Redox Regulation in Gut–Brain Axis Disorders · 2024 · DOI

Most-cited papers in Diet and metabolism studies

Most recent work

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Open questions raised by papers listed on this page include: (1) The relationship between mild ketosis and metabolic syndrome (MetS) remains unclear (“Mild ketosis, metabolic syndrome and genetic–lifestyle interactions in the UK…”, 2026); (2) Ketogenic diets are increasingly used for weight management and metabolic improvement, but it remains unclear whether nutritional ketosis induces uniform adaptation across metabolic phenotypes and sex (“Metabolic and hormonal responses to nutritional ketosis across metabolic…”, 2026); (3) There is limited data on the micronutrient intake of infants and children on ketogenic diets (“Critical Nutrients in Ketogenic Diets for Infants and Children Under Ten Years…”, 2026); (4) Further research is needed to fully understand the potential benefits and limitations of the ketogenic diet in adults with anorexia nervosa (“Symptom impact and safety of ketogenic therapy in adults with anorexia nervosa:…”, 2026); (5) There is a lack of understanding of the molecular mechanisms linking obesity to liver dysfunction (“Anti-Obesity and Hepatoprotective Effects of Probiotic Goat Milk in Mice:…”, 2025). 578 gap statements have been mined from Diet and metabolism studies papers in our 7.9M-paper local library, which holds 2,056 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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