...and the over use of chemicals and preservatives, but anything in excess will eventually cause problems. Well balanced, in small quantities based on the actual fuel your body needs to survive. It takes 700 calories a day to just breath and keep you blood flowing, if you work for a living, and don't sit at a desk all day, you need to eat more, but more important regular. Jamming everything in at one sitting isn't good for the digestion, same as eating a big meal right before you go to bed. It's all relative to what activities you do in a 24 hour period. Of course there are folks that just have the metabolism to gorge themselves, and appear to be fit on the outside anyway.