Antioxidant extracts from Dicerocaryum senecioides as active ingredients in semi‐permanents and hair conditioners.

Background: Different hair types respond differently to cosmetic treatments; hence, many options ought to be availed to the consumer. The purpose of this study was to evaluate the use of antioxidant extract from Dicerocaryumsenecioides as active alternatives in hair semi‐permanent waving and hair conditioning. Methods: The antioxidant phytochemicals were first identified and isolated by thin‐layer chromatography (TLC) and spraying with revealing agents. The antioxidant potency was determined by DPPH antiradical scavenging and ferric reducing power methods. The extract was incorporated in two different formulations to make the extract perm (bio‐semi‐permanent) and the antioxidant hair conditioner (AC). The formulations had their performance examined for hair curling and conditioning on Asian and African hair types. Hair damage was assessed by scanning the surface of treated samples on an attenuated total reflectance–Fourier transform infrared spectrometer (ATR‐FTIR) and by quantifying lost protein on ultraviolet visible (UV‐Vis) spectrophotometer. Results: The extract antioxidant had an IC50 of 26.54 ± 0.34 µg/ml exhibiting greater antioxidant potency compared to the controls quercetin (38.84 ± 0.12 µg/ml) and ascorbic acid (35.22 ± 0.07 µg/ml). The extract perm had a lower curling ability indicated by a perm set of 85.10 ± 3.92% and 81.35 ± 2.35% for Asian and African hairs, respectively, while commercial product, ammonium thioglycolate (ATG) had 96.05 ± 1.70% and 93.60 ± 2.21% for the same. The curling of hair with extract perm resulted in less oxidative damage with oxidative peak areas of 3.37 ± 0.09 and 3.71 ± 0.03 as well as lower protein losses of 4.72 ± 0.71 µg/mg and 5.62 ± 0.70 µg/mg on Asian and African hair samples, respectively. The application of AC reduced the oxidative damage peak areas of ATG and extract perm treated Asian hair samples by 1.15 and 0.48 units, respectively. AC was also effective in reducing damage caused by UV radiation on ATG‐treated samples by 1.06 units (African hair) and 1.09 units on Asian hair. Conclusion: The results show antioxidant extracts from Dicerocryumsenecioides as a promising and safer alternative for hair conditioning and semi‐permanent curling. [ABSTRACT FROM AUTHOR]