80% of our members start feeling better in the first year and we’re able to track that progress using our SE Symptom Index(PSI), which helps gauge your healing process over time.The SE Symptom index analyzes nine body areas ranging from musculoskeletal, to digestive, to mental health, and tracks progress over time. Using this tracker, we give you a total score based on how you’re doing—called the SE Symptom Index (PSI)—which gives your doctor a snapshot of your health.