Clinical nutrition approach in medical management of COVID-19 hospitalized patients: A narrative review.

Background: Malnutrition in COVID-19 hospitalized patients is associated with a high-risk condition to increase disease severity and prolonging the recovery period. Therefore, nutritional therapy, including supplements plays a critical role to reduce disease-related complications and the length of hospital stay.

Aim: To review the latest evidence on nutritional management options in COVID-19 hospitalized patients, as well as possibly prescribed supplements.

Developed and validated food frequency questionnaires in Iran: A systematic literature review.

Background: Food frequency questionnaires (FFQs) are inexpensive, easy to administer, and practical tools for dietary assessment in epidemiological studies. Several studies have investigated the validity and reproducibility of FFQs for the Iranian population. This systematic review aimed to assess the developed and validated FFQs for use in the Iranian population and compare their features and the validation studies in this regard.