The Underground Railroad was neither underground nor a railroad. It got its name because its activities had to be carried out in secret, using darkness or disguise, and because railway terms were used by those involved with system to describe how it worked.
Hydrolyzed collagen is collagen that is derived from bovine bone and cartilage. Usually, the bone is crushed, ground, defatted, soaked in acid to remove the calcium, soaked again to break the collagen bonds and then dehydrated.
Collagen produced by our body acts to provide strength and elasticity to our skin. As it starts to deplete naturally, our skin begins to sag or wrinkle. Hydrolyzed collagen supplements act to increase the collagen our body has lost. Hydrolyzed collagen can be found in a variety of personal care products.