Black coffee, with or without caffeine, is a cheap easy way to suppress your appetite without breaking your fast.

Fasting but still not losing fat?

Firstly you need to make sure you are fasting properly - drinking calories such as juice or milk will end the fast. Fasting should last for at least 16 hours.

You also need to eat less calories than you burn.

You can get an estimate of how many calories/kJ you need to maintain or reduce your weight:

Calorie Calculator