Struggling with ADD and Nutrition: Need Advice

I have changed my diet based on how foods make me feel... It's trial and error on my part. I've been doing it for 10 years now. Sweets I limit as much as possible. I drink only water and sometime tea... Avoid caffeine at all costs and I stay away from red meat as well. Honestly vitamins and pure clean eating should help. Organic or vegetarian options are normally great. The less processed the better. It's helped a ton. There's a few energy drinks Ive tried like bang that actually helped my focus but I don't use them much.