Do you read food labels and take note of additives in your food?

I am just watching the documentary series about Food Additives. I try to eat as little unprocessed food as I can just to eat healthy rather than simply avoiding food additives. I see so many people in the supermarket with their trolleys loaded up with processed food that it makes me wonder if people do take note of all the additional things in their food.

So do you read food labels and does the list of ingredients influence your purchase decisions?