Drinking plenty is a very important part of the Dukan diet, especially during protein days. The suggested 2-3 litres of liquids per day can seem like a daunting task when you start the diet, however you will quickly learn that it’s not only managable, but can help you enjoy your meals and avoid cravings.
One thing we should get out of the way first is that liquids does not mean just water. You are encouraged to drink with every meal any of the following:
bottled, sparkling, or tap
no sugar, but you can use sweeteners or skimmed milk; herbal tea is allowed too
no sugar, but you can use sweeteners or skimmed milk
diet pepsi, coke zero, or any other sugar-free drink