Krim Ekstrak Biji Markisa (pasiflora Edulis ) sama efektifnya dengan krim hidrokuinon 4 persen dalam menghambat peningkatan jumlah melamin pada kulit marmut jantan (Cavia Porcelus) yang dipapar sinar UV-B

Ultraviolet B (UVB) ray may cause hyperpigmentation of the skin due to increased melanin level. Passion fruit (Passiflora edulis) is a plant traditionally used to brighten the skin and can give satisfactory result due to its natural tyrosinase and antioxidant activities. This study was aimed to prove that cream of passion fruit extract could prevent the increase of skin melanin in UVB-exposed guinea pig (Cavia porcellus). This was an experimental study using a completely randomized posttest only control group design. Subjects were 30 brown guinea pigs, male, adult (6-8 months old), body weight of 250-300 g, divided into 3 groups as follow: 1) P0, the negative control group, exposed to ultraviolet B and applied with cream based substance; P1, the positive control group, exposed to ultraviolet B and applied with 4% hydroquinone cream; and P2, the treatment group, exposed to ultraviolet B and applied 75% passion fruit extract cream. The results showed that the average amount of melanin in the P0 group was 17.52±4.72%, whereas in the P1 group was 1.25±0.45%, and in the P2 group was 1.79±0.78% (P <0.001). The LSD test showed that the P0 group had the highest amount of melanin (P <0.01) meanwhile the P1 group had the similar result with the P2 group (P >0.05). Conclusion: Passion fruit (Passiflora edulis) extract crream could prevent increased skin melanin in UVB-exposed guinea pig (Cavia porcellus) and its effectiveness was similar to those of 4% hydroquinone cream. Keywords: passion fruit, melanin, UVB, guinea pigs