Table 2.
Inhibitory activity of selected plants on tyrosinase when both tyrosine and L-DOPA are used.
| Plant extracts [500 μg/mL] |
(%) | |
|---|---|---|
| Tyrosine | L-DOPA | |
| Aloe aculeata Pole-Evans (Leaves) | 31 | — |
| Aloe arborescens Mill. (Leaves) | — | * |
| Aloe ferox Mill. (Leaves) | 60 | — |
| Aloe pretoriensis Pole-Evans (Leaves) | 17 | — |
| Aloe sessiliflora Pole-Evans (Leaves) | 13 | — |
| Aloe vera (L.) Burm.f. (Leaves) | — | * |
| Calodendrum capensis Thumb. (Leaves) | — | * |
| Calodendrum capensis Thumb. (Bark) | — | * |
| Harpephyllum caffrum Bernh. (Leaves) | 90 | 70 |
| Harpephyllum caffrum Bernh. (Bark) | 92 | 60 |
| Sclerocarya birrea (A. Rich.) Hochst. (Nuts) | — | * |
| Ximenia americana L. (Nuts) | — | * |
*not tested, —not active.