Harvey made the comments during a segment on his Steve TV Show.
During the show, he invited creator of The Green Print plan, Marco Borges - who is described by Beyoncé as her 'food guru', and has created a plan with the singer and her husband Jay-Z encouraging people to try plant-based - to come and talk about the benefits of eating plant-based.
"First and foremost, a plant-based diet is full of fiber, which helps to lower bad cholesterol, helps lower blood pressure, helps to lower your risk factors for diabetes, heart disease, dementia, cancer," said Borges.
"It's the only diet in the world that has been clinically proven to not just prevent, but also arrest and reverse heart disease. No other diet in the world can say that."
He added that it's easy to opt for more plant-based foods, suggesting people start by switching just one meal a day to a healthy, plant-based one.
Speaking about his own experiences ditching animal foods and following the plan, Harvey said: "Let me tell you something. I've been doing this since January 4, I got to tell you, I do feel a lot better.
"I do feel a lot better. I kid you not...I have the cholesterol levels of an infant. My cholesterol numbers are lower than my cardiologist's cholesterol numbers.You can eat your way healthy. You are what you eat."
"Every time we eat, we are either fueling disease or feeding health," Borges added. "We are not at the mercy of our genes...Disease is not what's hereditary - it's the habits that are hereditary. Change your habits and you change your destiny."