Colorful produce, fish, walnuts and flaxseed promote tendon and ligament healing. Tendons are tough, flexible bands of tissue that connect muscle to bone. Ligaments are similar bands that connect bone and cartilage to joints and organs. Healthy connective tissues support your ability to move, exercise and lift objects freely. Tendons and ligaments may be damaged by overuse, illness or injuries, such as tendinitis. In addition to medical treatments, physical therapy and rest, certain foods may help your ligaments and tendons heal.