Testing your pH value is important because it instantly indicates your health level. Healthy blood has a pH level of 7.35. A pH below 7 is acid and is an indication of poor health. You may experience symptoms like: low energy , pains and aches, mood swings, worrying and fears, poor sleep or being over weight. If you have a pH of 5, you’re probably seriously sick. You can reverse this acid state by eating more alkaline foods.