Alfalfa is a member of the legume group. Alfalfa serves a number of purposes agriculturally (soil conditioner, feed grass) and is also cultivated for use in dietary supplements. Alfalfa, also known as Medicago sativa is a green grass full of fiber and trace minerals. It's most commonly used to support good digestion and elimination. Many people consider greens like alfalfa to be helpful in alkalizing and cleansing the system. As a 'green fiber', alfalfa is a great supplement for you if you don't eat a lot of greens or get much fiber in your diet. Alfalfa been also been used for joint problems. Its trace minerals are key factors in rebuilding and repairing joint tissue.