Choline is a vitamin supplement that is present in several forms, including phosphatidylcholine (PC). The medicinal effects of choline are presumed to be caused by phosphatidylcholine.
Chondroitin sulfate is the major glycosaminoglycan (GAGS - see separate article found in this series) found in cartilage. It promotes water retention and elasticity in the cartilage, helping to ensure adequate shock absorption and adequate nourishment of the tissues that line the joint.
Coenzyme Q-10 (CoQ-10, CoQ10 or ubiquinone) exists in abundance in every human and animal body. It is an essential component of the mitochondria, which are the parts of the cell that produce energy from oxygen.
Colostrum is the antibody-rich fluid produced from the mother's mammary glands during the first day or two after birth. It contains a number of antibodies and growth factors, which young animals and humans can absorb intact for the first couple of days following birth.
Dimethylglycine is a highly unusual supplement, in that it is extremely popular despite the fact that all of its touted effects have largely been refuted by clinical and laboratory testing. It is most widely used as a performance enhancer by athletes, and in dogs and horses that are bred for racing purposes.
Herbal remedies made from the Echinacea plant are exceedingly popular. Different chemical effects are observed with different species and different plant components.
Enzymes catalyze (enhance through increased rate of chemical reaction) virtually every function in the body, from digestion to tissue repair, and from hormone function to energy production. Without them, these same processes would occur much too slowly to be compatible with life.
The herb ephedra, known in Chinese medicine as Ma Huang, comes from the plant species Ephedra sinica and Ephedra equisetina. The active ingredients in herbal ephedra are bronchodilating alkaloids, including ephedrine, pseudoephedrine, norephedrine, and norpseudoephedrine.
Eyebright (Euphrasia officinalis) is an herb that has mild antimicrobial (antiseptic), anti-inflammatory and astringent properties. As the name suggests, it appears to have a special effect on the eye.
Most omega fatty acid supplements are made primarily from fish oil or flax seed oil (see the separate handouts on these products in this series), although some products may include other oils such as evening primrose oil, hemp oil, or borage oil.