Below 6.3 is considered acid, above 6.8 is considered on the alkaline side. Maintaining proper body ph is especially important to anyone concerned about bone density, since the bones actually leach calcium into the system to correct an over acid ph.
Some prescription drugs are acid-forming and contribute to bone loss.
If you take medication, consider taking a good quality calcium supplement to ensure calcium absorption, and keep you diet on the alkaline side. An excessively alkaline ph is rare, but can often result from overuse of antacids, vomiting and diarrhea, high cholesterol, endocrine disorders, and poor diet. Most meat and dairy products. Processed foods and flour products. Aspirin, tobacco, and most drugs.