Can taking cla supplement affect the colour of our urine? and are there any bad side effects?

Yes: Don't know about the urine but you need to know these are not FDA approved because these companies do not do the rigorous testing that is required. There are some actions of these supplements that reduce caloric intake but no product beats your ability to make a choice at each meal about choosing the right food and eating only the amount you need for the day. Visit your meal on half. Simple.