Kellan Lutz recently switched to the low-carb Paleo diet and has never felt better.
"I adopted the Paleo diet," Lutz told Knoxville.com. "It helped me because I had tons of energy. It made me even more healthy and able to stay sick-free and push, because I pushed myself quite a bit."
Kellan, 28, started following the Paleo diet several months ago to play Hercules in the film, "The Legend of Hercules."
The Paleo diet emphasizes high-quality animal proteins, fats, vegetables and fruits, and excludes gluten, sugar, dairy, legumes, starches, alcohol and processed foods.
Proponents say it produces dramatic weight loss without deprivation and praise its emphasis on whole foods over processed junk. NBA superstars such as Kobe Bryant and Ray Allen are followers of the Paleo diet, as is supermodel Adriana Lima.
The rippling 6-foot-1 Lutz said the Paleo diet enabled him to reduce body fat and helped him stay healthy despite lots of grueling training and a rough shooting schedule.
The former Calvin Klein model said eliminating sugar from his diet was extremely difficult at first, but he's glad he did it.
"I really started getting really tight, which was quite nice," said Kellan. "I ate a lot of proteins but it was really hard deleting the candy from my system because I love candy. You really just notice that your body will adjust, and you feel healthier."
Lutz's training for "Hercules" involved lots of weight-lifting, horseback-riding, fighting with swords and coordinating action scenes with stuntmen. While it was tough, the athletic Kellan enjoyed the hard work.
I'm an action junkie at heart. I love pushing myself to the limit. I don’t really have fears as far as heights, skydiving, or bungee jumping. I love mixed martial arts, weapons training, guns, knives, driving fast cars, and motorcycles. I love it all."
Meanwhile, former pro wrestler Dwayne "The Rock" Johnson is also playing Hercules in a separate film, "Hercules: The Thracian Wars." To prep for his role, The Rock has been consuming seven high-protein meals a day consisting of three pounds of meat and a cup of lion blood daily.