Gas production is a very common symptom people experience despite the diet and feeling good in general. I personally experienced it after eating protein for months after starting the diet.
What solved my problems? I take a mineral supplement thats called zypan by standard process. It does contain lactose (small amounts), however it can completely reduce or eliminate problems associated with gas. I take 3 pills per meal and haven’t had the problem since.
A few others have taken it on the forum with great success!
I don’t know of anything else that can help.