When it comes to skincare vitamins, vitamins A, C, and E usually receive the most attention. However, vitamin K is another nutrient that has gained interest for its potential skin benefits, particularly in products designed to target dark under-eye circles and bruising. Vitamin K is best known for its role in blood clotting, bone health, and maintaining healthy blood vessels. It naturally occurs in leafy green vegetables such as spinach, kale, and broccoli and is also produce