Cosmate®SM, Silymarin bivuga itsinda rya antioxydants ya flavonoide isanzwe iboneka mu mbuto y’amata y’amata (ikoreshwa mu mateka nk'umuti urwanya uburozi bw’ibihumyo). Ibigize Silymarin ni Silybin, Silibinin, Silydianin, na Silychristin. Izi miti irinda kandi ikavura uruhu imbaraga za okiside iterwa nimirasire ya ultraviolet. Cosmate®SM, Silymarin nayo ifite antioxydants ikomeye yongerera ubuzima ingirabuzimafatizo. Cosmate®SM, Silymarin irashobora gukumira kwangirika kwa UVA na UVB. Harimo kandi kwigwa kubushobozi bwayo bwo kubuza tyrosinase (enzyme ikomeye ya synthesis ya melanin) na hyperpigmentation. Mugukiza ibikomere no kurwanya gusaza, Cosmate®SM, Silymarin irashobora kubuza umusaruro wa cytokine itwara umuriro hamwe na enzymes ya okiside. Irashobora kandi kongera umusaruro wa kolagen na glycosaminoglycans (GAGs), igateza imbere inyungu nyinshi zo kwisiga. Ibi bituma urugimbu rukomera muri serumu ya antioxydeant cyangwa nkibintu byingirakamaro mu zuba.