Nourishment. Lymph helps nourish the body by transporting essential nutrients such as salts, minerals and proteins to all parts of the body. Most of the cells in our body don't make direct contact with the blood, but rather receive their nutrients directly through the lymph that surround the cells. In this way, the lymphatic system and the circulatory system work in tandem to send nourishment from our digested food to the cells of our body.
Detoxification. Simultaneously, lymph transports waste products from the cells of our body into the blood stream, which then carries these waste products to the eliminative organs — primarily the liver, colon and kidneys. Lymph has the capacity to carry undigested food material, large molecules of protein and other waste particles that can't pass into the blood stream. This is as much a potential health problem as it is a benefit. If the lymph gets loaded up with too many big globs of waste and undigested food, it will congest and could ultimately get blocked, causing the formation of swollen lymph nodules or glands. Diets high in protein may congest the lymph system.
Movement of the Lymph. Lymph does its work outside of the cells, acting as a liaison between the cells and the blood. The lymph moves throughout the body in lymphatic vessels, whose valves allow lymph to flow only in one direction. The lymphatic vessels don't pump lymph; they rely on the contraction of surrounding muscles and, to a lesser degree, the gentle movement of nerve impulses in order to move lymph through the lymphatic system. For this reason, physical activity — exercise, yoga, stretching, rebounding, walking, etc — is essential to lymphatic health. Lymphatic massage can also be used to help move lymph through the lymph system.