Deb, that’s interesting the SCD didn’t help your fingernail ridges either. I added back corn, potatoes and rice after being on the SCD for two years and I started having a recurrence of IBS type symptoms (bloating and pain) even though I wasn’t eating ANY gluten. I also had a return of crazy carb cravings (especially from CORN) which led to a 10 pound weight gain and I was feeling a little more foggy headed so I’ve recently gone back 100% SCD but low histamine. I’m going to stick to it the rest of my life because it really does make me feel so much better. The “Breaking the Vicious Cycle” by Elaine Gottschall was the book that got me started and I used the stages on pecanbread dot com as a guide for when to add foods back into my diet. My best, SweetFeather