Drinking regular or lemon-cucumber-infused water helps keep you hydrated, promotes fullness, and boosts your metabolism, thereby promoting weight loss. This scientific study on lemons concludes that it is possible that polyphenols found in lemons may stimulate the liver to produce enzymes that block the absorption of dietary fats. However, you cannot outdrink a bad diet and while drinking lemon water can indirectly help certain people lose weight, it does not beat having a well-balanced diet. In this regard, you should always speak to your nutritionist or healthcare practitioner about the best options for you.