Such agents include glycyrrhetinic acid, notably liquorice derivatives, such as the salts and esters of same; lipoic acid; beta-carotene; vitamin B3, such as niacinamide and nicotinamide; vitamin E; vitamin C; vitamin B12; flavonoids, for example green tea, quercetin, etc.; lycopene or lutein; avocado sugars; avocado oleodistillate; arabinogalactan; lupin peptides; total lupin extract; peptide ext