Apple cider vinegar
Apple cider vinegar contains acetic acid, which research from Trusted Source shows can lighten pigmentation.
- Apple cider vinegar
- Combine equal parts apple cider vinegar and water in a bowl.
- Apply it to your dark spots and leave it on for two to three minutes.
- Rinse with lukewarm water.
- Repeat the operation twice a day until you achieve the desired results.
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