Oh Boy --

I see a couple of red flags here:

- passing out (perhaps hypoglycemic)
- high blood pressure
- a physically challenging job

My only recommendation is that he start the fast on a weekend when he can test the reaction. I know the first couple of days I'm so tired/disoriented/fuzzy that the last thing I'd want to be doing is physical labor.

If you feel apprehensive, it's best to trust your gut. You know him better than any of us on this MB -- but it would make me cautious.

Best,

Melanie