How long does the effect of Rivicol last when the skin is very dry and feels severely tight?

Maybe it's because I sit under the air conditioner or heater for so long, but after washing my face, it cracks like a desert and hurts so much ㅠㅠ No matter how thickly I apply nourishing cream and moisturizing ampoule, the extreme dryness I feel deep inside just won't go away lol. Something that directly replenishes collagen and moisture to the dermis layer Livicol I'm looking into skin boosters because I heard they work wonders for dry skin! Once you get one, it fills your skin with a firm, inner glow. Livicol moisturizing effect Duration Roughly how many months does it last? For extremely dry skin like mine Livicol I'm wondering if it makes my skin smooth without any side effects if I get it. Livicol Those of you who have tried this, please make sure to leave a vivid review lol