Using it straight from the bottle might be too aggressive for your skin, as apple cider vinegar is highly acidic and contains malic and lactic acid. In the right proportions, lactic acid fades dark spots because of its exfoliating effect. Mix equal parts apple cider vinegar with water in a bowl before applying to dark spots using a cotton ball. Leave it on for a few minutes before rinsing off with cool water. Continue daily until the dark spots fade.
As these are home remedies, with varying brands and quality of ingredients, make sure to try these on your hand before applying it straight to your face. Watch for any itching or inflammation.
While there’s some truth to how effective these ingredients are, we can’t stress more the need to use clinically-tested skincare. These products have undergone thorough research and development to make sure they work to deliver results and strengthen skin health. So, take advice from grandma, but never replace your product-based skincare routine.