With attractive options for cosmetic soaps available in the market, it is hard to resist the temptation to buy and use them. However, the chemicals that these soaps are made from are concerning for human health. This video looks at 2 young students who have given a safer alternative to such soaps. They have made herbal soaps through a reaction of fats and oils with sulphur dioxide. Sulphur dioxide SO2 is a colourless, non-inflammable compound which is used as an antioxidant and preservative here since it is the combination of antioxidative activity with its ability to inhibit polyphenol oxidase.