Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Lung function
[116] Systematic review	156 people 6 RCTs in this analysis	FEV1 with nutritional supplementation for 2 weeks with placebo or usual diet Absolute results not reported	SMD –0.12 95% CI –0.44 to +0.20		Not significant
[116] Systematic review	152 people 6 RCTs in this analysis	Maximal inspiratory pressure with nutritional supplementation for 2 weeks with placebo or usual diet Absolute results not reported	SMD +0.22 95% CI –0.10 to +0.55		Not significant
[116] Systematic review	152 people 6 RCTs in this analysis	Maximal expiratory pressure with nutritional supplementation for 2 weeks with placebo or usual diet Absolute results not reported	SMD +0.28 95% CI –0.05 to +0.60		Not significant
Exercise capacity
[116] Systematic review	77 people 3 RCTs in this analysis	6-minute walk distance with nutritional supplementation for 2 weeks with placebo or usual diet Absolute results not reported	SMD –0.01 95% CI –0.46 to +0.44		Not significant