Assertion: collagen | /r/HasProperty | natural
Facets:
Source sentences:
text: It is natural for the body to produce and repair the damaged collagen fibers.
text: Collagen is a natural product and is thus used as a natural wound dressing and has properties that artificial wound dressings do not have.
text: Collagen is a natural protein found in bone, cartilage, skin, and tendons; there are 27 different types of naturally occurring collagens in the body.
text: Because collagen is a natural substance and requires no surgery to achieve results, collagen treatment is one of the safest ways for people to enhance their appearance.
text: Collagen is a natural and healthy ingredient that has been used for centuries.
text: It is natural for the body to produce and repair the damaged collagen fibers.