I'm an expert on that diet and also the sleeplessness and paranoia that comes with it for me. Could just be me but I remember reading something about competition for amino acid precursors of serotonin in crossing the blood brain barrier, specifically Trytophan. It's a big one.
The bad part is that people around me had to tell me about the personality changes. Once had a soft pretzel stuffed in my mouth by my lady friend.
I’m down almost 50lbs since last year and look better than I have in over 15 years.
Its worked for me. Not no carb - but low carb