When hair is exposed to the sun there may occur protein degradation, which alters its physical appearance. Thus, beneficial hair adjuvants with addition of natural sunscreens are sought for cosmetics development. In this study, we developed hair conditioning products containing blueberry, raspberry, cranberry and resveratrol in different proportions, incorporated into TrichoCond®. In vitro photoprotection capacities of the products and cystine content of the hair samples after treatments were determined. Two conditioners out of the seven tested presented a significative sun protection. Three samples of treated hair presented suitable results in maintenance of the cystine content in the hair fiber after sun exposure. Hair conditioning products developed using resveratrol (alone or in combination) showed better hair fiber protection against solar radiation. The materials used showed increased photoprotection when used in combination, suggesting a synergic effect among them.