While indulging in that sugary goodness may not be harmful for one day like Valentine's Day, a UVA Health clinical dietitian is warning consumers to be mindful of their daily consumption of added sugar. "If you have a little bit of sugar, it can make you feel good and perk you up and make you feel happy, but if you are consuming excessive amounts of added sugar, over time, it can lead to the total opposite," Katherine Basbaum said.