PROBLEM TO BE SOLVED: To provide an antioxidant, a cosmetic, a food and drink composition and a pharmaceutical composition which are excellent in ameliorating/preventing effect and therapeutic effect of various skin troubles such as rough skin, wrinkles, pigmentation, pimples and dermatitis caused by oxidation reaction generated by aging or ultraviolet rays in daily life, and further which are stable, inexpensive, and excellent in safety.SOLUTION: This invention relates to an antioxidant containing citrullyl fructosyl glucose as an active ingredient, a cosmetic blended with citrullyl fructosyl glucose, a food and drink composition blended with citrullyl fructosyl glucose, and a pharmaceutical composition blended with citrullyl fructosyl glucose.
