<<Disclaimer: Verify this information before applying it to your situation.>>

After many responses and research etc, it appears that the body can/may
undergo withdrawal/detox in the initial periods of a 100% GF diet.

Some responses raised the rather interesting point that the lethargy etc may
in fact be a mental release from the tension of "what's wrong with me".

One response, and some further research, revealed that gliadin based
substances can have an opiate like effect, and hence the withdrawal/detox
effects, similar to maybe caffeine withdrawal.

Many thanks to those that shared their experiences.

Regards
Chris Belyea