Research Database

To determine the effect of 8 days of sleep restriction on caloric intake, activity energy expenditure, and circulating levels of leptin and ghrelin in humans.

To investigate whether sleep duration affects appetite-regulating hormones and body mass index (BMI) in adults.

To synthesize evidence from systematic reviews and meta-analyses on the effect of iron supplementation on cognitive development in children aged 2–12 years.

To investigate the effects of iron deficiency anemia and serum ferritin deficiency on mental and motor functions in children 1 to 5 years old and whether these...

To review the association between iron deficiency and cognitive and neurobehavioral outcomes in children, and evaluate the cost-effectiveness of intervention...

To review recent data on the prevalence and consequences of micronutrient deficiencies in school-age children and adolescents, and to emphasize the need for...

To summarize current evidence on associations between elevated vitamin B12 levels and cancer risk and all-cause mortality in adults.

To quantify the relationship between serum vitamin B12 levels and risks of all-cause, cardiovascular, and cancer mortality.

To investigate associations of serum folate and vitamin B12 levels with cardiovascular disease mortality among individuals with type 2 diabetes.