Vitamin K

Treat skin discoloration, such as dark circles, spider veins, rosacea, acne irritation and overall splotchiness, with vitamin K. It heals because it improves blood coagulation, which is impaired in cases of skin redness and irritation. A guava provides 1.4 micrograms of vitamin K, which is about 2 percent of the 80 micrograms Food and Drug Administration daily value.