From heart disease to diabetes, chronic illness is the leading cause of death in the United States, and chronic disease is a major reason why the nation spends more than $4 trillion on health care every year.

But a growing number of researchers believe reexamining our relationship with food is key to both improving our health and saving money.

"When you provide medically tailored meals to people who are experiencing food insecurity and chronic illness, you'll see a 16% net cost savings — and that's monthly," said Jean Terranova, senior director of policy and research at Community Servings. "That's 49% fewer in-patient hospital admissions, 70% fewer emergency department visits, and 72% fewer admissions to skilled nursing facilities."

Food is medicine, these advocates argue. But changing your relationship with food can be difficult, says Paul Hepfer, CEO of Project Open Hand: "That's part of why it's so important for us to have our education piece that accompanies the meal. So, it's not just 'Here's your meals for six months or a year. Good luck. See you later.' ... We give people the tools to start cooking that way themselves."

Eating more whole foods — including fruits, vegetables and grains — and fewer ultra-processed foods is key to a healthier diet.

"I think of it as almost a reintroduction," said Olivia Weinstein, director of nutrition innovation and implementation for Boston Medical Center. "So, this was something that once was and then kind of left our daily living, and we're reintroducing it back in."

Olivia Weinstein, director of nutrition innovation and implementation for Boston Medical Center

Jean Terranova, senior director of policy and research at Community Servings

Paul Hepfer, CEO of Project Open Hand