Impulse buying leads to weight gain. This occurs because no matter how good the intention, there is a struggle in everyone’s brain that makes such buys almost impossible to resist in the grocery store.
Grocery stores place the bad stuff—like candy and soda, also known as the “good stuff”!— close to the checkout line, which is at the end of a grocery shopping experience. At that point, the brain operates at a much weaker level because the brain has been debating other food choices, usually struggling over which items are going to be healthy choices.
This means stores are taking advantage of our limited decision-making capabilities at the end of all that mental back and forth so that we buy more that we don’t really need, but that we really can’t resist.