Table 1.

Population, intervention, comparison, outcome and setting (PICOS) criteria used to define the research question.

Parameter	Description
Population	Adults with mean age ≥19 years
Intervention	Consumption of animal protein, as food or supplement
Comparator	Consumption of plant protein, as food or supplement
Outcome	Change in muscle mass and/or muscle strength
Study design	Randomized controlled trials
Research question	Are there differences in the effect of animal protein and plant protein on muscle mass and strength in adults?