Millions of dollars are spent each year by folks looking to reverse the aging process. From expensive creams to plastic surgery, people will try almost anything to appear younger. A recent study shows that one of the most effective, safe, and cost-effective ways to slow aging is to wear sunscreen — not just at the beach or by the pool, but every single day. According to CBS News , this study "examined 903 people 55 and younger, to see whether daily sunscreen would stall their aging more than people who used the products at their discretion." The findings were published June 3 in the Annals of Internal Medicine. Researchers calculated the daily sunscreen group showed 24 percent less skin aging than those in the discretionary group by study's end. Most of those in the daily sunscreen group ended up using it at least three to four times per week. Sunscreen's anti-aging properties were observed in all participants who used it daily, regardless of age, meaning adults up to 55 were also protected. Via Reuters: "This study effectively shows that daily sunscreen can reduce the signs of photoaging and photodamage," said Dr. Brundha Balaraman, a dermatology researcher from the Washington University School of Medicine in St. Louis. The research is led by Dr. Adele Green, a professor at the Queensland Institute of Medical Research at the University of Queensland in Australia, and a collaborator with University of Arizona researchers in the Pan-Pacific Skin Cancer Consortium. In addition, The University of Arizona Cancer Center's Skin Cancer Institute is among those looking into all the various benefits of regular sunscreen application.