How This Helps
Low-calorie sugar free iced tea is an excellent alternative for increasing fluid content in CKD patients, rather than opting for highly carbonated drinks. You can also flavor your tea with a squeeze of lemon. However, avoid adding milk to your tea, because milk is difficult to digest, especially with weak kidneys.
Science and Research
If you are looking for a healthy beverage to drink, look no further than making iced tea. Tea contains Vitamin A, C, and E, as well as healthy compounds called Flavonoids. The flavonoids in tea, called polyphenols, are antioxidants that give tea, its healthy benefits (Kolbe, 2014). Stay away for canned or bottled iced teas that are sold in supermarkets as they may contain phosphorous and high sugar content.
Reference:
http://www.niddk.nih.gov/health-information/health-topics/kidney-disease/nutrition-for-advanced-chronic-kidney-disease-in-adults/Pages/facts.aspx