Melissa Sinsiriphan. Development of liquid lip product containing natural extract from dragon fruit skin. Master's Degree(Cosmetic Science). Mae Fah Luang University . : Mae Fah Luang University , 2017.
Development of liquid lip product containing natural extract from dragon fruit skin
Abstract:
This research aims to extract and stabilize dragon fruit skin extract as well as to incorporate the extract in lip tint formulation as it is a non-edible part and often a waste. However, red color extracted from dragon fruit skin was not as intense as expected and unstable under extreme conditions, 45oC and fluorescence light exposures. The stability results have shown that dragon fruit skin extract encapsulated with alginate has better stability than free pigment. This can be seen that ΔE value of encapsulated extract was 77.71% lower than free color extract by the end of week 4. In addition, both free and encapsulated extracts incorporated in clear lip tint formulation provided pinkish red color to the formulation but could not stain skin. For this reason, synthetic color needs to be added in order to achieve red stain on skin. According to the moisturizing effect test on 10 volunteers, lip tint formulation with 2.5% free dragon fruit skin extract gained the highest average percentage moisture increase of 49.04±13.76% with the p-value of 0.000 comparing with other samples with encapsulated extract. Therefore, dragon fruit skin extract is more preferred to be used as a moisturizing agent rather than a colorant.