Meta-analysis of the effects of third-wave behavioural interventions on disordered eating and body image concerns: implications for eating disorder prevention.

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• Third wave behavioural interventions, such as acceptance and commitment therapy, dialectical behaviour therapy, mindfulness-based interventions and compassion-focused therapy are increasing in popularity and may be useful in both eating disorder treatment and prevention.
• Prevention of eating disorders is likely to be more cost-effective than treatment. Healthcare practitioners should be mindful of considering third wave interventions in their client referrals.

Third wave behavioural interventions are increasing in popularity and this meta-analysis provides evidence that they may be useful in both eating disorder treatment and prevention. Eating disorders have a complex and poorly understood aetiology, which makes their treatment and prevention a challenge for public health. Third-wave interventions for eating prevention disorders provide a promising approach that can be delivered through various means including digitally.

Prevention of eating disorders is likely to be more cost-effective than treatment, and practitioners should be mindful of considering third-wave interventions in their client referrals. This should include those at risk of eating disorders (e.g. displaying a poor body image) as well as those with these conditions.

As third wave interventions increase in popularity, further evidence is needed in the form of robust and valid trials to explore their value - particularly in terms of eating disorder prevention. Research is also needed on their application alongside other traditional therapies including those involving nutrition interventions.