Thank you for addressing Sjogren's Syndrome which effects approximately 4 million Americans. Unfortunately laboratory tests are not definitive for Sjogren's syndrome. Sjogren's is an autoimmune, inflammatory, connective tissue, rheumatic disorder. 90% of the people effected are female. It can effect almost any organ in the body which which produces symptoms from dry skin, rashes,asthma, gastrointestinal and genitourinary inflammation, chronic fatigue,fibromyalgia, hearing loss, depression etc. Amongst the early symptoms can be a mouth full of cavities as the saliva is missing enzymes,as well as sensitivities to foods and drugs,and being tired . It can be mistakenly diagnosed as MS, Lupus and hypochondria. Please visit http://www.sjogrensusa.com for a wide variety of related information. No membership or products sold.