| Outcome | Grade | Effect | Studies | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Skin Thickness | 
        C
       | 
 | 
 | |||||||
| Skin Elasticity | 
        C
       | 
 | 
 | |||||||
| Skin Smoothness | 
        C
       | 
 | 
 | |||||||
| Wrinkles | 
        C
       | 
 | 
 | |||||||
| Fine Lines | 
        C
       | 
 | 
 | |||||||