The Kryptopyrrole Test measures the level of kryptopyrrole in urine. When high levels of kryptopyrrole a neurotoxin circulate in the body, it binds with Vitamin B6 and zinc causing them to be depleted faster and preventing their use in the brain and body. A high incidence of this is demonstrated in Autism Spectrum Disorders, ADHD, Bipolar Disorder, Schizophrenia, alcoholism, and Down Syndrome.