Apply in the morning, after cleansing and drying your face. Make sure to avoid the area around the eyes. Remember to shake the bottle before each use. The duration of each bottle, after preparation, is 10 days, during which it maintains its effectiveness and potency.
To prepare the bottle, do the following:
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Replace the original cap with the one containing vitamin C;
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Press the cap and shake vigorously for 30 seconds to activate the formula;
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Replace the cap with the dropper applicator and apply 3 to 4 drops.