| Outcome | Grade | Effect | Studies | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Skin Smoothness | 
        A
       | 
 | 
 | |||||||
| Skin Elasticity | 
        B
       | 
 | 
 | |||||||
| Skin Brightness | 
        B
       | 
 | 
 | |||||||
| Wrinkles | 
        B
       | 
 | 
 | |||||||
| Fine Lines | 
        B
       | 
 | 
 | |||||||