Objectives:
Epidemiological studies exploring the role of flavonoids intake in preventing type 2 diabetes mellitus (T2DM) showed inconsistent results. Therefore, this review article (meta-analysis) has been conducted.

Does flavonoids intake decrease risk of developing type 2 diabetes?

Objectives:
Is there an association between wine consumption and prostate cancer risk?

Study design:
This review article included 6 cohort and 8 case-control studies with a total of 455,413 subjects regarding moderate wine consumption and risk of prostate cancer.

There was no evidence of publication bias.

Results and conclusions:

Objectives:
Double-fortified salt (DFS) containing iron and iodine has been proposed as a feasible and cost-effective alternative for iron fortification in low- and middle-income countries (LMICs). Therefore, this review article has been conducted.

Does double-fortified salt containing iron and iodine increase hemoglobin concentrations and decrease the risk of anemia in low- and middle-income populations?

Study design:

Objectives:
In the past, some observational studies have been carried out on the relationship between milk and dairy intake and risk of acne occurrence. However, their results were conflicting. Therefore, this meta-analysis (systematic review) has been conducted.

Does milk and dairy intake increase risk of acne?

Objectives:
Several epidemiological studies have assessed the ability of vitamin B2 to prevent colorectal cancer (CRC), but the results are controversial. Therefore, this review article has been conducted.

Does vitamin B2 intake reduce colorectal cancer risk?

Study design:

Objectives:
Invasive pneumococcal disease (IPD) is associated with high morbidity and mortality, with immunocompromised patients (ICPs) at particular risk. Therefore, guidelines recommend pneumococcal vaccination for these patients. However, guidelines are scarcely underpinned with references to incidence studies of IPD in this population. This, potentially results in unawareness of the importance of vaccination and low vaccination rates. Therefore, this review article has been conducted.

Should immunocompromised patients be vaccinated?

Objectives:
Prostate cancer (PCa) is one of the leading cause cancer among men worldwide. Many epidemiologic studies have reported an association between carbohydrate intake and prostate cancer. However, the evidence from epidemiologic studies is inconsistent. Therefore, this review article has been conducted.

Does carbodydrate intake increase prostate cancer risk?

Study design:

Objectives:
The association between coffee consumption and the level of C-reactive protein (CRP) has been evaluated in several epidemiological studies with conflicting results. Therefore, this meta-analysis (systematic review) has been conducted.

Does coffee consumption reduce level of C-reactive protein in humans?

Objectives:
The association between dietary protein intake and type 2 diabetes risk has been inconsistent in the previous epidemiological studies. Therefore, this review article (meta-analysis) has been conducted.

Is there an association between dietary protein intake and type 2 diabetes risk?

Study design:
This review article included 10 prospective cohort studies with a total of 34,221 type 2 diabetes cases.
No publication bias was detected.

Objectives:
Low maternal free thyroxine (FT4) has been associated with poor child neurodevelopment in some single-centre studies. Evidence remains scarce for potential adverse effects of high FT4 and whether associations differ in countries with a different iodine status. Therefore, this review article has been conducted.

Is there an association between maternal thyroid function in early pregnancy and child neurodevelopment in countries with a different iodine status?

Study design: