Our Skin Renewal Tonic has naturally astringent properties of witch-hazel, which tighten the skin. It also visibly diminishes dark spots with the help of vitamin C-packed citrus peels. Tea tree helps with skin healing that can aid in the elimination of acne and in the disinfection of superficial wounds. The base of this tonic is unfiltered apple cider vinegar, packed with probiotics and naturally acidic, making this tonic a gentle skin astringent.