Empirical evidence of study design biases in nutrition randomised controlled trials: a meta-epidemiological study.
Julia StadelmaierIsabelle RouxMaria PetropoulouLukas SchwingshacklPublished in: BMC medicine (2022)
On average, most characteristics of nutrition RCTs may not exaggerate intervention effect estimates, but the average bias appears to be greatest in trials of subjective outcomes. Replication of this study is suggested in this field to keep this conclusion updated.