I dont think pharmicists would prescribe LT if it was unsafe but as with all diets there are precautions etc and you have to have a health check before you sign up! You should read up as much as you can hun before even thinking of starting, check out the LT website and also read up on ketosis which is what we are in when doing LT.
I have finished LT now hun afterlosing almost 4 stone, i followed a special refeed programme which brings foods slowly back in to your diet, i have been healthy eating now for 5 weeks without gaining any weight and eating more than 1000 cals just not too much fat xxx