Are you just starting a New Year's diet? 

Well, you might want to rethink it after watching this morning's "Fox and Friends" segment about how chemistry, not calories, may be the real driver of weight gain.

Lyn Genet-Recitas, author of "The Plan Cookbook," talked to Elisabeth Hasselbeck this morning about her book, which asks people to throw out what they think they know about meticulous calorie-counting.

Genet-Recitas acknowledged that her ideas are a bit controversial, but said it all comes down to how each individual's body reacts to food.

She said as people age, their ability to digest food - even very healthy items - deteriorates as metabolism slows. 

"Most people are under-eating. They're not getting enough nutrients," she said.

Genet-Recitas said, for example, that some people may not know they're having an inflammatory response to healthy things like salmon, Greek Yogurt, oatmeal and strawberries. That can lead to weight gain, faster aging and possible illness. 

Her cookbook focuses on helping people make everyday, anti-inflammatory recipes that everyone can enjoy.

Watch her advice above and check out her book, here.