因此我理解为维生素D合成过程使皮肤变黑即黑色素也。维生素D早晨服用,褪黑素晚间服用,昼夜循环,人体奥秘。
因此我理解为维生素D合成过程使皮肤变黑即黑色素也。维生素D早晨服用,褪黑素晚间服用,昼夜循环,人体奥秘。
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