The enhanced formula of the Kativa Brazilian straightening kit, which includes argan oil, shea butter, vegetal keratin, amino acids, and glyoxylic acid, penetrates the hair fiber and straightens it for up to 12 weeks of at-home use, provides professional-level results while restoring and recovering the strength of hair. gives hair its strength back along with some sheen, moisture, and softness, so that it moves naturally and is manageable.