Biological Terrain Assessment

The Biological Terrain Assessment or BTA is a set of tests used to measure the pH, resistivity, and redox of a person's urine, blood, and saliva. The usefulness of the test is debatable. It is often associated with homeopathy and holistic health.

Usefulness
Proponents of the BTA claim that comparing the pH, resistivity, and redox of the blood, urine, and saliva provides a health practitioner an indication of the metabolic processes taking place inside the body. Their detractors claim that these indicators are medically irrelevant because they are less precise than the indicators available from the more sophisticated tests available today. The most alarming evidence against the BTA is that multiple manufacturers of BTA equipment have been prevented from selling their equipment in the United States, because they lack Food and Drug Administration (FDA) approval. However, the FDA has not stated whether the BTA is medically useful or not.