Table 5.

Comparator recommendation statements

	Mean	sd	% rated ≥ 7·0
1. The choice of control condition should be clearly explained and justified.	9·28	0·99	100
2. Prioritise the use of placebo or best-practice comparators over waitlist controls.	7·56	2·59	72
3. In dietary interventions, when achieving effective blinding is challenging, attempt to match expectancy and engagement in the intervention and control.	8·50	1·61	89
4. For interventions involving nutraceuticals or foods, the placebo should be matched in appearance, taste, smell, and packaging.	7·83	2·19	83
5. Consider employing placebo diets and rigorously reviewing trial materials to sustain blinding.	7·72	2·76	83
6. Consider use of non-inferiority trial designs to compare Nutritional Psychiatry interventions to currently recommended treatments (e.g. cognitive behavioural therapy, pharmacotherapy).	7·67	2·60	78