Nick Cannon has given up eating fast food following his recent health scare.

The 'America's Got Talent' host - who was hospitalised with kidney failure and blood clots on his lungs before being diagnosed with autoimmune disease lupus nephritis earlier this year - has made radical changes to his diet in order to stay healthy.

He said: "I feel better than I've ever been. I'm in the best shape that I've ever been in.

"Since this whole thing has happened, I haven't had any salt, red meat, fast food. [I've only had] chicken and fish. I feel so great. I'm juicing a lot."

The 31-year-old star and wife Mariah Carey will celebrate their twins Moroccan and Monroe's first birthday on April 30, and are planning to head overseas as a family.

He said: "It's amazing. It goes by so fast. We're going away. We're taking a break. It's going to be exciting. We're doing something special and something unique."

But with their increasing age comes increasing mobility, much to Nick's terror.

He explained to People Magazine: "They're trying to walk and I'm nervous because they're at that age when anything can happen.

"My son has this thing where he loves banging his head and crushing stuff. Something new is happening every day."