A new study investigated if the type of payment shoppers used at the grocery store affected the type of food they purchased. They found that those paying with debit or credit were more likely to purchase unhealthy foods ("impulse buys" e.g. throwing candy or cookies into the shopping cart without a second thought) than those who paid with cash. The process of handing over cash may prevent impulse purchases because it could be more psychologically painful to pay with cash than to swipe a plastic card!
So, if you're trying to be more aware of what you buy at the grocery store, try paying with cash and see if this little trick helps!
Information Source:
http://www.nlm.nih.gov/medlineplus/videos/news/cash_credit_102810.html
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