Vitamin C is arguably the single most important water soluble antioxidant in the human body. Antioxidants play a key role in protecting cells against free radicals, which accumulate daily, and thus must be "neutralized" to keep a strong immune defense. A lack of vitamin C means poor collagen, resulting in cracks appearing between coronary cells thus leading to various types of unhealthy aging. Recently, Dr. Sydney Bush, an English researcher, made a monumental discovery. He took photos of the retinal arteries and then gave these older patients 6, 000 milligrams of vitamin C and 5, 000 of lysine, which increases the natural collagen. (Lysine adds strength to coronary arteries just like steel rods increase the strength of concrete.) A year later he repeated the pictures. To his surprise, he saw graphic evidence of enormous improvements in heart health The essential amino acid Lysine, a building block of protein, is probably best known for its use in those needing to renew and repair skin. But several other benefits have been ascribed to the molecule, including favorable effects on maintaining healthy blood pressure, and also a positive influence on mood and anxiety.