How come if you have more sugar than usual over a period of a few days why does it make you feel sick and yuck? i keep caving in and eating junk

Sugar is a POISON!: This is because sugar is literally a poison; it is toxic in the sense that it is very harmful to our health in many ways; increasing inflammation, impairing immunity, disrupting hormones etc. As with any poison, the more you take the worse the effect; a little after a balanced meal will not create nearly as many problems as lots on an empty stomach. See http://tinyurl.com/ber748c for more info.