Sleep expert on why people should prioritize sleep quality over quantity

When it comes to maintaining heart health, it's not just how long you sleep — it's how well you sleep that matters equally, if not more, said Dr. Shelby Harris, a behavioral sleep psychologist and clinical associate professor at Albert Einstein College of Medicine.

"Poor quality sleep really can influence our heart health as well," Harris told "CBS Mornings" in an interview during American Heart Month. 

Harris said the body's balance of ghrelin and leptin, hormones that regulate hunger, is also disrupted by poor sleep, leading to increased consumption of high-sugar and high-fat foods.