If you are fasting, there are some things that you can do to help reduce the acidity. I would recommend taking a calcium + magnesium supplement. This should help reduce the acidity in your body. If you are not fasting and just eating healthy, then your body may be simply producing too much acid because of your diet (foods, etc.). You may want to try drinking more water as this will help flush out some of the extra acids from your body and also help with digestion and absorption of nutrients from food.