As a bruise heals, hemoglobin breaks down into other compounds. This process is what makes your bruise change colors. Learn more:
The Mayo Clinic: “Easy bruising: Why does it happen,” “Thrombocytopenia .”Seattle Children’s Hospital: “Skin Lump.
”National Institutes of Health Office of Dietary Supplements: “What Is Vitamin C and What Does It Do?”"What Is Vitamin B-12 and What Does It Do?""What Is Vitamin K and What Does It Do?”"What Is Folate and What Does It Do?”
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