| Outcome | Grade | Effect | Studies | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Skin Hydration | 
        C
       | 
 | 
 | |||||||
| Skin Oiliness | 
        C
       | 
 | 
 | |||||||
| Skin Firmness | 
        C
       | 
 | 
 | |||||||
| Skin Elasticity | 
        E
       | 
 | 
 | |||||||
| Skin pH | 
        E
       | 
 | 
 | |||||||
| Outcome | Grade | Effect | Studies | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Glycosaminoglycans | 
        C
       | 
 | 
 | |||||||
| Fibronectin | 
        C
       | 
 | 
 | |||||||
| Protein Carbonylation | 
        C
       | 
 | 
 | |||||||
| Elastase | 
        C
       | 
 | 
 | |||||||
| Elastic Fibres | 
        E
       | 
 | 
 | |||||||