You’ve had collagen in your body since the day you were born. But once you reach a certain age, your body stops producing it entirely. This is when collagen injections or fillers can come into play.

The following information has been prepared by the Food and Drug Administration to answer questions about the regulatory status and the possible risks of two cosmetic procedures: collagen injections ...

Table 1 Type I collagen expression at the injection site of filler in each group at different time points (\({\overline{\text{x}}} \pm {\text{s}}\)). Table2 Type III collagen expression at the ...