What does it mean when your blood gets darker? - Quora

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What causes dark blood in the body? - Quora

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Human blood is red, why do our veins look green or blue? - Quora

I have brown dark patches over my neck back and chest what could they be? - Quora

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Why do hands and feet get black? - Quora

What is a wheatish complexion? - Quora

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Why is the area around my mouth darker than the rest of my face? (see comment) - Quora

What does it mean when your blood gets darker? - Quora

What is meant by blood serum? - Quora

Is oxygenated blood and deoxygenated blood the same color? - Quora

What is the function of tuna dark meat? - Quora