Study of sunscreem activity of flower extracts of targetes erecta
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The aim of the present study was to evaluate the sunscreen activity of Herbal cream containing flower extract of Nyctanthes arbortristis L. (Oleaceae) and Tagetes erecta L. (Compositae). The shade dried flowers were extracted successively with petroleum ether and ethanol in soxhlet apparatus. Two different sunscreen creams were formulated using ethanolic extract and tested for the pysicochemical parameters such as colour, odour, spreadability, pH, specific gravity, limit test for lead and viscosity. Stability study and sensitivity study was done by centrifugation method and patch test for irritancy respectively. Sun protection factor is a laboratory measure of the effectiveness of sunscreen; the higher the SPF, the more protection a sunscreen offers against the ultraviolet radiations causing sunburn. The in vitro SPF of the formulations was determined according to the UV Spectrophotometric method of Mansur et al. The sunscreen cream containing ethanolic extract of N. arbortristis under study produced high absorbance at 290-320 nm wavelength range and SPF obtained was 10.21±2.18. The sunscreen cream containing ethanolic extract T. erecta obtained the SPF 8.67±1.35. From the result obtained in the study, we can positively conclude that N. arbortristis sunscreens will enhance and significantly contribute to the UV absorbing properties of conventional sunscreen formulation. It will also help in broadening the UV protection ability of the sunscreen along with the greatest advantage of avoiding the adverse and undesired effects of synthetic sunscreen compounds.
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