If being a vegan isn't quite challenging enough for you, perhaps you'll be interested in an even more extreme diet trend—raw veganism.
Raw veganism is similar to traditional veganism, but it allows only raw foods.
That means raw vegans cannot eat anything that's been cooked at a temperature above 118 degrees fahrenheit.
Yeah, it's pretty hardcore.
But dedicated raw vegans swear by the diet's benefits.
Tennis star Venus Williams went raw vegan in 2012 after being diagnosed with an autoimmune disorder.
"Once I started, I fell in love with the concept of fueling your body in the best way possible."
"Not only does it help me on the court, but I feel like I'm doing the right thing for me," Williams told HEALTH.
The 37-year-old Williams had two runner-up finishes in Grand Slam events last year, so the diet certainly seems to be working for her.
However, raw veganism is not something we recommend for most athletes—unless you have a personal chef and nutritionist.
It can be very difficult to ensure you're getting all the nutrients you need via a raw vegan diet.