A randomised controlled trial (RCT) is a type of scientific study in which participants are randomly assigned to receive one of several interventions, with the goal of determining which intervention is most effective. RCTs are considered the gold standard for evaluating the effectiveness of medical treatments, as they help to minimize biases and confounding variables that could impact the results. Participants in RCTs are typically assigned to either an experimental group (which receives the intervention being tested) or a control group (which receives either a placebo or standard treatment). The outcomes of both groups are then compared to determine the effectiveness of the intervention. RCTs are widely used in medical research to evaluate the efficacy of new drugs, treatments, and interventions.