You need to change your diet. Try eating about four times a day but smaller amounts and exercise. I bought a exercise machine and it has helped a lot. Got mine here http://cookinguprecipes.com/health-diet/ or you could try a retail store in your area.
When mine went bad which I had to have taken out chocolate was really bad for it and fried foods. Good luck with yours.
Yogurt is a dairy product and I have a great yogurt recipe you can check out at cookinguprecipes.comm