There are also unintended consequences of regulations. I know that if I start eating snacks that have less salt, sugar and fats, I will eat more of them. I will then have less room to eat health foods. The net affect is that I will be less healthy.
Maybe the most important reason against regulations is that they are not ethical. If I want to make a transaction with someone - what right do bureaucrats or politicians have to interfere? Read more about this in Prof. Thomas Sowell's book: Economic Facts and Fallacies.