I'm glad I read this thread! This might be an 'aha' moment for me; I've been battling high blood pressure since going vegetarian, and that's the reason I went on the McDougall diet in the first place.
I still get it, but lately I've been noticing that it's following an episodic pattern, i.e. its normal for some weeks then goes sky high for someweeks, then back to normal for a few weeks. Right now it's the lowest I've ever seen it. I've been wondering all along about an undiagnosed food allergy, and now would be the time to test it out.
Does anyone know, if one has this problem, how long after eating the nutritional yeast it takes for the BP to go back down?
Organizer, Seattle Area Support Group.