I have a double mutation for the CBS 699t. I know Dr. Yasko suggests a low protein/sulfur diet to reduce ammonia buildup. My problem is that I am on a paleo-like diet for my ME/CFS and take supplements like NAC and ALA which are not allowed as part of that protocol. I do feel better when I do not eat but my amino acid levels do not show elevated taurine like she says with this mutation. I am concerned about going this route because 1. I don't know if anyone gives it credibility and 2. I am on a diet that aims to use protein/fat for energy and less on carbs with the supplements boosting mitochondrial health.