Onion + ACV to lighten dark spots...Dice a fresh onion. Transfer the bits into a Ziploc bag and pulverize them using a blunt surface. Next, use your blender to process the onion with half a cup of organic apple cider vinegar. You are looking for a smooth texture. Soak a cotton ball in the resulting mixture and apply it directly on your age spots. For optimal results, this every day for 2-4 weeks.