How long is a safe time to be on the Cambridge Diet as a sole source of nutrition?

KizzyB questioned:

A supporter of mine has been on the Cambridge Diet contineuosly for 92 income. She is compelling in 440 calories a day using the Cambridge Diet milkshakes/soups/other powder-based provisions.

I be inflicted including looked on the Cambridge diet website, and it recommends no longer than 4 weeks. I am apprehensive including the intention of she is building herself ill. She is extremely emotional.

I be inflicted including not encounter of this diet and would be thankful for anyone’s aid including this.