Dietary control and compliance
In the last week of each intervention and run-in/wash-out stages, volunteers were asked to complete a 24 h dietary questionnaire corresponding to the day before each control visit, and previously a 72 h detailed food intake record. Total calories, macronutrients, micronutrients and dietary fibre (DF) intake were evaluated using the program DIAL (Faculty of Pharmacy, UCM, Madrid, Spain).Compliance with the food restrictions and correct intake of oils was controlled by weekly calling or emailing participants. Volunteers were provided with an incident and observation sheet where they could note down any anomalies or irregular developments.