The Arthritis Foundation is pleased to provide information to the 3.5 million Texans who live with the pain of arthritis. The Arthritis Foundation is the only national not-for-profit organization that supports the more than 100 types of arthritis and related conditions. The Arthritis Foundation is the largest private, not-for-profit contributor to arthritis research in the world, funding more than $380 million in research grants since 1948.