Britesea
Sustainability Master
Sounds like your friends were on the Carnivore diet, rather than Keto. When I read about the Carnivore diet, I couldn't help thinking "Look at your teeth! You were made to be an Omnivore!" Vitamin C is one vital vitamin that humans cannot synthesize, and I don't recall reading that meat has any. Even the Inuit, which came closest to carnivore that I ever read about, relished the vegetable contents of the seals they killed.
But I have also read stuff online written by people that claim to eat nothing but meat and say they feel great...
Fat is also really important. I remember reading an interview with a participant of one of those "survival" shows where she was on a tropical island. There was plenty to eat: lots of fish in the sea, lots of tropical fruits and stuff. But she lost weight and said she spent the entire time there feeling constantly hungry because there were almost no fat sources.
But I have also read stuff online written by people that claim to eat nothing but meat and say they feel great...
Fat is also really important. I remember reading an interview with a participant of one of those "survival" shows where she was on a tropical island. There was plenty to eat: lots of fish in the sea, lots of tropical fruits and stuff. But she lost weight and said she spent the entire time there feeling constantly hungry because there were almost no fat sources.