|
Head & Shoulders is an American brand of anti-dandruff shampoo produced by parent company Procter & Gamble. Procter & Gamble researchers started making an anti-dandruff shampoo in 1950. Nearly a decade of research went into making a new formula, which introduced pyrithione zinc into the shampoo.〔(Head and Shoulders (pyrithione zinc) )〕 It was first introduced to the U.S. market in November 1961 as a blue-green shampoo formula. There are now nine different Head & Shoulders varieties for varying hair types, and the formula has since changed color to white. ==Ingredients== Active ingredient: Pyrithione zinc 1% Inactive ingredients: water, sodium laureth sulfate, sodium lauryl sulfate, cocamide MEA, zinc carbonate, glycol distearate, dimethicone, fragrance, cetyl alcohol, guar hydroxypropyltrimonium chloride, magnesium sulfate, sodium benzoate, magnesium carbonate hydroxide, ammonium laureth sulfate, benzyl alcohol, sodium chloride, methylchloroisothiazolinone, methylisothiazolinone, sodium xylenesulfonate, blue 1, red 4 The active ingredient in Clinical Strength Head & Shoulders is selenium sulfide 1%.〔Procter and Gamble, Head and Shoulders Clinical Strength Shampoo MSDS Sheet ()〕 With the exception of Head and Shoulders Clinical Strength Shampoo, the rest of the line of shampoo products specifically contain pyrithione zinc as the active ingredient.〔http://www.pgproductsafety.com/productsafety/msds/beauty_care/haircare/head_and_shoulders/Head_and_Shoulders_Classic_Clean_2_in_1_Pyrithione_Zinc_Dandruff_Shampoo_(95584188).pdf〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Head & Shoulders」の詳細全文を読む スポンサード リンク
|