06 Jan 2015 --- Do you resolve to eat healthier and lose weight in 2015? Watch out for this "healthy illusion" discovered by researchers at the Cornell Food and Brand Lab. First, the researchers found that shoppers spend 15% more on food during the holiday season (Thanksgiving to New Year's) and only about 25% of that additional food is healthy. This means that during the holidays we tend to buy more junk food--not a big surprise.