if body is deprived from some enzymes or food for certain time period, body forgets to process it (epegeneic or what ever).
read interesting story of ex-healthy girl who can not digest normal food now after dieting for long time.
[i]For the next ten years she saw more than 30 health specialists, though once dipped to a dangerously low 3st 10lbs. Today, even if she wanted to eat certain foods, she would be unable to.
Many foods have to be avoided because they don’t agree with her body any more. It has been so long since she ate bread that she can no longer remember what it tastes like.
Read more: dailymail.co.uk/health/artic … z2G5Bl3nEE
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full story
dailymail.co.uk/health/artic … -thin.html