Watermelon
Watermelon
As its name suggests, watermelon contains plenty of water-it makes up 92 percent of the fruit-so it is rehydrating as well as delicious. Watermelon has a high GI (72) but low GK (10), owing to its high water content. Low caleries, low sodium and virtually fat-free, watermelon is also loaded with nutrients, particularly vitamin C, making it a superbly healthy diet food. The seeds contain essential fatty acids and protein, so if you juice watermelon, be sure to leave the seeds in.