Unfortunately I don't have the answers for you. However this is something that I'm very curious about also!
Shannon Dyer
No it can not be sustained long term and it is not good for your health
Jenny Loupe
There are long- term effects, therefore it's recommended to only do keto for 12 months max. In addition, as with any restrictive diet, it's a challenge to follow with limited food choices/flavors and you can gain weight once you stop the diet.