Clear Skin Willow Bark Booster-SerumHelp heal irritation and reduce the appearance of problem skin with this concentrated serum and product enhancer infused with willow bark and tea tree oil. Apply a thin layer over the entire face, or apply to affected areas 13 times per day. Alternatively, combine 2 3 drops with an Eminence masque or moisturizer. Key Ingredients Willow Bark: calms skin Horsetail: softens and tones the skins appearance and promotes the look of elasticity Walnut Leaf: