Table 2 Inclusion and exclusion criteria for study selection

Article type

Full-text

Study design

RCT

Conference abstracts; cross-sectional studies; longitudinal studies; reviews; trial protocols; book chapters; studies without placebo group; case reports; opinions; commentaries

Language

English; Korean

Population

Healthy adults aged  ≥  40

Sample size

≥ 10 subjects

Exposure

Supplementation; dietary phytochemicals available to older adults clearly described; amount, dosage, frequency, and duration of intervention clearly described

Primary outcomes

Measures of skeletal muscle-related function; body composition; physical performance