Clear Nose Vitamin C Serum (sachet) Skincare is a facial care product that helps brighten the skin, reduce dark spots and acne scars. This product comes in a 7 gram sachet, which is convenient to carry and easy to use. Clear Nose Vitamin C Serum (sachet) Skincare is a facial care product that helps brighten the skin, reduce dark spots and acne scars. This product comes in a 7 gram sachet, which is convenient to carry and easy to use.