*2.1. Types of Studies*

Only randomised controlled trials (RCTs) including crossover and parallel designs were included in this review.

### *2.2. Types of Participants*

Adult participants with type 2 diabetes regardless of the existence of co-morbidities (e.g., obesity) were selected for the review.

#### *2.3. Types of Interventions*

We included RCTs comparing the provision of almonds or advice to increase almond consumption with a control group (no intervention or habitual diet or other types of nuts) also with type 2 diabetes. There was no restriction regarding the minimum and maximum amount of almonds consumed. RCT including multiple interventions (diet and exercise) were not considered. There was no restriction regarding the duration of the interventions.
