Objectives:
Intervention studies suggest that incorporating walnuts into the diet may improve blood lipids without promoting weight gain. Therefore, this review article has been conducted.

Objectives:
Chloroquine remains the mainstay of treatment for Plasmodium vivax malaria despite increasing reports of treatment failure. Therefore, this review article has been conducted.

Objectives:
Despite the World Health Organization recommendation of exclusive breastfeeding (EBF) for the first six months of life, the rate remains low both in developed and developing countries. In Ethiopia, findings regarding the prevalence of exclusive breastfeeding have been highly variable. Antenatal care and institutional delivery are the most important factors contributing to the practice of exclusive breastfeeding. However, their effect has not been investigated in Ethiopia. Therefore, this review article has been conducted.

Objectives:
Do dietary flavonoid intake reduce colorectal cancer risk?

Study design:
This review article included 5 prospective cohort and 7 case-control studies with a tolal of 17,481 cases (persons with colorectal cancer) and 740,859 controls (persons without colorectal cancer).

Objectives:
Inflammation is associated with an increased risk of a range of chronic diseases. A diet high in fruit and vegetables may help to reduce inflammation, as fruit and vegetables are rich sources of antioxidants and other biologically active substances, which may improve immune function. Therefore, this meta-analysis (systematic review) has been conducted.

Does fruit or vegetables intake reduce inflammation and improve immune function?

Objectives:
Is hepatitis B vaccination in adults causally associated with autoimmune diseases?

Study design:
This review article included 14 controlled studies with documented incidence of autoimmune diseases occurring after hepatitis B vaccinations in adults from January 1990 to March 2017.

Results and conclusions:

Scientific studies  (review articles) on the relationship between vaccination and ending poverty in developing countries:
One swallow does not make a summer. A famous Dutch saying that could not be any more obvious. Just because one single scientific study about a certain topic makes certain claims, it does not necessarily mean it is true. On the other hand, a review article (a collection of scientific studies on a certain topic) of randomized, placebo-controlled double blind clinical trials (RCTs) will answer the following question:

Objectives:
Oxidative stress has been found to be implicated in the development of Alzheimer's disease (AD). Therefore, this review article has been conducted.

Is there an association between selenium level in the brain and Alzheimer’s disease? 

Objectives:
What are the effects of ginger intake on weight loss, glycemic control and lipid profiles among overweight (BMI>25) and obese (BMI>30) subjects?

Study design:
This review article included 14 RCTs with in total of 473 subjects.

Results and conclusions:
The investigators found that supplementation with ginger significantly decreased among overweight (BMI>25) and obese (BMI>30) subjects:
-body weight (BW) [SMD -0.66, 95% CI = -1.31 to -0.01, p = 0.04];

Objectives:
Meta-analyses on the effect of vitamin D intake on status in children are lacking, especially those focused on vitamin D-fortified foods. Therefore, this review article has been conducted.

What is the effect of vitamin D interventions (fortified foods, supplements, bolus injections) on vitamin D status in children 2-18 y of age?

Study design: