I mix 1/3 apple cider vinegar, a few drops of tea tree oil and a few lemon drops with all together with some water to dilute it. Otherwise it will be to concentrated. Here are the alleged benefits of these ingredients:
Apple Cider Vinegar: Has antibacterial properties that help prevent skin infections. Also helps balancing your skins pH levels so that it won't be too oily or to dry. When you wash your face it's very easy to strip your skin of its natural oils - ACV helps balance the pH level again. Can also help dimish scar discoloration.
Tea Tree Oil: This has antiseptic properties that help treat blemishes and its antibacterial properties control the formation of new ones.
Lemon: Help dimish discoloration caused my scars. Also has antibacterial properties to help prevent further breakouts. Can also slightly brighten the skin to show off a more healthy complexion.
Keep in mind that your experience may differ simply because we all have different skin that reacts differently. This toner gives me a smoother all over look to my skin.