On the show, Good Morning Britain , Lundgreen explained he was introduced to the documentary through his friend Arnold Schwarzenegger. "I checked it out and figured I'd try it," he explained to hosts Piers Morgan and Susanna Reid.

The TV presenters joke that plant-based diets supposedly increase a man's sexual performance. Then they ask Lundgreen whether he noticed any benefit.

"Well, it was already quite good," said Lundgreen. "It went up about 50 percent."

Morgan pressed the actor for clarification, asking if Lundgreen really noticed a difference.

"I think maybe a little bit," said Lundgren. "I'm a lover, not a fighter," he joked.

Although he may be joking about the impact of a vegan diet on his sex life, Lundgren says he does have more energy these days.

Plus, he actually enjoys the way of eating since it's a nice change from chicken and vegetables. "This is more fun," he explained. "You can have those Beyond Burgers."

Of course, eating plenty of fruits and vegetables is a good idea. However, the documentary does have its inaccuracies, Men's Health previously reported.

At one point the film states, Even iceberg lettuce has more antioxidants than salmon or eggs.

This type of thinking over-values one nutrientantioxidants, for exampleover others: omega-3 fatty acids found in fish and choline in eggs.

Ultimately, it's not that getting people to eat plants is a bad thing. It's generally a great thing. But you don't have to do so by erroneously telling people that meat is killing them, and they need to go to an all-plant diet. That is a false dichotomy, Brian St. Pierre., M.S., R.D., C.S.C.S., Director of Performance Nutrition at Precision Nutrition , previously told Men's Health.

Just remember: eating more plants is always a good idea, but it may not make you better in bed.