One of the papers mentions using an existing commercial TDR (total dietary replacement) product: https://www.one2onediet.com/ https://www.one2onediet.com/ And

One of the papers mentions using an existing commercial TDR (total dietary replacement) product: https://www.one2onediet.com/ https://www.one2onediet.com/ And a calorie limit of 8-900 per day (and some support from a weight loss consultant, which I guess I spires the name, the 1:1 diet)