Black currant seed oil is an excellent source of GLA (gamma linolenic acid) and ALA (alpha linolenic acid). According to University of Maryland Medical Center, GLA stimulates healthy skin and hair growth. Sunflower seed oil contains Vitamin E and fatty acids that promote shiny hair and glowing skin. As an antioxidant, Vitamin E neutralizes free radicals that damage collagen and dry the skin. According to the University Maryland Medical Center, a healthy dose of Vitamin E can prevent premature aging and damage. Research suggests that Vitamin E improves capillary growth, which increases follicle circulation and moisture for fuller hair that is free split ends. Sources: "Vitamin E." University of Maryland Medical Center. January 2012. Beoy LA, et al. Effects of tocotrienol supplementation on hair growth in human volunteers. Pub Med. NCBI. NLM. NIH. December 2010. Gamma-linoenic-acid. Complementary and Alternative Medicine Guide. University of Maryland Medical Center. July 2011. "Black Currant. WebMD.