It helps red blood cells carry oxygen and prevents formation of methemoglobin. It also helps them keep their shape and enhances their passage to the vital organs. Glutathione also participates in the transport of amino acids across cell membranes that are needed for protein synthesis and cellular function. Vitamin A and other carotenoids such as -carotene, lutein, and lycopene are all effective radical scavengers. These vitamins are abundant in green plants, carrots, tomato, and other vegetables.
Vitamin E is made up of naturally occurring compounds called tycopherols.
They are highly active free radical scavengers, and protect lipid membranes from oxidation. Tocopherols also are important in fertility. These vitamins are found in fish, especially fish liver oil. Coenzyme Q-10 is a powerful reducing agent that prevents lipid peroxidation. It resides in the inner membrane of mitochondrion and plays an important role in the respiratory chain.