Some of the most powerful medicines on the planet are masquerading around as foods and spices. While they do not lend themselves to being patented, nor will multi-billion dollar human clinical trials ever be funded to prove them efficacious, they have been used since time immemorial to both nourish our bodies, and to prevent and treat disease.
Confused about what to put on your skin to protect it from the sun? Is a tanning bed a safer way of maintaining that "healthy glow"? How much sun is good for us? How much sun is bad? Is it better to get natural sunlight or controlled exposure through a tanning bed?
While ubiquitous in nature, melanin, which provides the coloring found in hair, skin, eyes, feathers, scales, etc., is an especially important substance as far as the human condition is concerned. After all, melanin's role in determining skin color makes it the primary physiological basis for racial differentiation among humans.