The Blood Type Diet A Lectin Blocking Formula Designed for Type A Individuals Dietary Supplement Stearate Free Encapsulation GMP Quality Assured Dr. Peter D'Adamo has identified dietary lectins (proteins found in many common foods) as an important influence on the body's immune system and metabolism. As a result of this research, he has designed specific 'lectin blocking' formulas to help support the body's immune system and metabolism.D'adamo