Keratin is what makes up hair, horns, claws, hooves and more. It additionally protects epithelial cells from damage or stress. However, keratin is extremely insoluble in water and organic solvents. You are unlikely to find it in said solvents.
An average person is just a general citizen.
Chronic stress<span>, or a constant </span>stress<span> experienced over a prolonged period of time, can contribute to long-term problems for </span>heart<span> and blood vessels. The consistent and ongoing increase in </span>heart<span> rate, and the elevated levels of </span>stress<span> hormones and of blood pressure, can take a toll on the body</span>