“The most important fight of my life isn’t in the ring,” Tyson said. “I’m not fighting for a belt. I’m fighting for our health. Processed foods are killing us. We have been lied to and we need to eat real food again. … Grateful to MAHA, White House and Secretary Robert F. Kennedy, Jr. for letting me be part of this great movement. Here’s to a healthier future.”

The 30-second spot was sponsored by the Department of Health and Human Services-aligned nonprofit organization MAHA Center.

In the black-and-white commercial, an emotional Tyson spoke directly to the camera, with a tear in his eye, about his personal struggles with weight nearly 15 years ago and the need to cut processed foods. He also took a bite from an apple.

“I was so fat and nasty. I would eat anything. I was like 345 pounds,” Tyson said. “I had so much self-hate when I was like that. I just wanted to kill myself. We’re the most powerful country in the world, and we have the most obese, pudgy people. Something has to be done about processed food in this country.”

Tyson shared details about eating “a quart of ice cream every hour” and said that his sister, Denise, died at 25 after a heart attack linked to obesity.