Comparison of sunscreens Containing Titanium Dioxide Alone Or In Association With Cocoa, Murumuru Or Cupuaçu Butters

Ingredients of natural origin may represent alternatives for formulating sunscreens, without compromising their effectiveness. The literature has shown the antioxidant potential of compounds existing in murumuru (Astrocaryum murmuru), cupuaçu (Theobroma grandiflorum) and cocoa (Theobroma cacao) butters that recommends further investigation. The objectives of this research were: (1) to develop bioactive photoprotective formulations containing cocoa, murmuru or cupuaçu butters in association with a physical sunscreen (titanium dioxide (TiO2)) and (2) determine the possible photoprotective activity of butters and their interactions with the sunscreen. Cocoa, cupuaçu and murumuru butter were individually associated to TiO2 in O / W emulsions. The anti-UVA and UVB efficacy in vitro was estimated by diffuse transmittance analysis in a Labsphere® UV2000S, using quartz plates and Transpore® tape to obtain the SPF (sun protection factor) and critical wavelength. Photoprotective formulations containing titanium dioxide and bioactive butters were obtained using Aristoflex® AVC and triglycerides of caprylic capric acid (GTCC). The SPF of the samples containing only TiO2 and formulations containing cocoa, murumuru or cupuassu butters associated with TiO2 ranged from 4 to 5. The critical wavelength values for these formulations ranged from 383.0 to 386.7 nm. The results indicated no increase in the SPF value for formulations containing vegetable butters. The critical wavelength values indicated their potential to absorb part of the UVA radiation.