Why Brendan Fraser's extremely low-carb diet for 'George of the Jungle' messed with his brain, causing him to forget his PIN

• Brendan Fraser was "starved of carbohydrates" for his role in the 1997 film "George of the Jungle."
• This led to him forgetting his bank PIN, he told Adam Sandler for Variety.

Brendan Fraser said he was so starved of carbohydrates for his eponymous role in "George of the Jungle" that he forgot his bank PIN.

Brain fog is a common symptom of a diet lacking in carbs, experts told Insider.

Speaking to Adam Sandler for Variety, the actor said his character's "wardrobe was there was no wardrobe."

"George wears a loincloth," Fraser said of his 1997 role, which remains one of his most famous.

"You made us feel bad about ourselves," Sandler said, before asking "Were you oiled up at all during 'George'?"

Fraser said: "I was waxed. Starved of carbohydrates."

"I would drive home after work and stop to get something to eat," Fraser said. "I needed some cash one day, and I went to the ATM, and I couldn't remember my PIN number because my brain was misfiring. Banging on the thing. I didn't eat that night."

Lack of carbs can lead to brain fog

Carbohydrates are essential for brain function, and brain fog can be a result of not consuming enough, dietitian Nichola Ludlam-Raine previously told Insider.

Lily Soutter, a registered nutritionist, previously told Insider that "carbohydrates are a primary source of fuel that gives our muscles and brain the energy that it needs to move and think."

Fraser is not the first actor to speak out about the negative consequences of dieting for a movie role. Zac Efron said his "Baywatch" physique was unsustainable and led to insomnia and depression, and Channing Tatum said his body in "Magic Mike" was a result of starving himself.