The shampoo ... deploy 2-3% in their bottles; however in Vichy Dercos the salicylic acid is toned down to 1%, to play a somewhat supportive role to the more aggressive selenium sulfide.
Selenium sulfide 2.3%; contains urea, zinc pyrithione. Dermatitis, dandruff: massage and lather onto wet skin, rinse and dry; apply twice weekly for 2 weeks. T. versicolor: massage and lather onto ...
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