The green or gold leaf hostas including the variegated forms of these colored leaf perennials are a slugs idea of smorgasbord delights. The waxy coated leaves of this blue hosta are plants that slugs donât like to eat.
Skin pigmentation. Melanin, whose primary function is in pigmentation, has many more important functions to perform in the human body. Protection from UV radiation. Melanin functions as a sunscreen and as a broad spectrum sun radiation absorbent. The absorbed energy causes redox reactions, and both eumelanin and pheomelanin form free radical species. Eumelanin, being more photostable scavenges the originated oxidative species and neutralizes them.
The skin serves as the primary barrier to the external environment. Melanocytes provide photoprotection by producing melanin. The degree of pigment in the skin is reflected in the skin color, which is the most useful predictor of human skin cancer risk in the general population. There are two main types of melanin pigment: red/yellow pheomelanin and brown/black eumelanin.