Table 4.

Intervention recommendation statements

	Mean	sd	% rated ≥ 7·0
1. Investigators should determine if the intervention will be investigated as a monotherapy, adjunct to standard care, or in combination with other treatments (e.g. diet-nutraceutical, diet-exercise).	8·39	1·89	78
2. Manualise whole diet or behavioural interventions, conducting fidelity testing to ensure exposure integrity.	8·06	1·18	100
3. Ensure that dietary interventions involve research dietitians or clinical nutritionists proficient in relevant counselling techniques, like motivational interviewing, to bolster intervention adherence.	8·67	1·70	89
4. For dietary interventions, include comprehensive guidelines on food safety, hygiene, storage, and preparation, especially when introducing unfamiliar foods.	7·22	2·88	72 %
5. For specific participants (e.g. rural or remote areas or if high risk of food insecurity), ensure ingredient availability in food supplementation or whole diet interventions.	8·06	1·58	78
6. Ensure intervention delivery is tailored to the included population demographics (e.g. culture, age, gender) and accommodates common psychological symptoms like reduced motivation or attention.	8·72	1·63	83
7. Consider various modes of delivery for dietary trials, including dietary counselling, controlled feeding (in which most or all food is provided) and hybrid trials (counselling and feeding) based on the research question.	8·17	1·57	83
8. Consider the potentially independent influence of motivational counselling on mental health outcomes when designing and interpreting trials.	8·11	1·63	83
9. Focus dietary interventions on ad libitum or weight-neutral designs unless targeting weight loss specifically.	8·17	1·92	83
10. Decide between individual or combined nutraceutical compounds for interventions, providing a rationale for the chosen design.	7·33	2·45	67