My skin barrier has thinned, so how long will Quad Say last? lol

Maybe it's because I've been exposed to the air conditioner's direct breeze all summer, but my skin is completely rough and the internal dryness is no joke ㅠㅠ No matter how much moisturizer and regenerating cream I apply before bed, by the next morning my makeup cakes and white flakes of dead skin appear, making it look so awful lol. To firmly tackle internal dryness and strengthen the skin barrier, I need something rich in nutrients Quadsay I heard that skin boosters are all the rage these days, so I highly recommend them! Even if you have combination skin like mine—oily on the surface but feeling like it's cracking underneath— Quadsay I'm curious if it brings out a deep inner glow like a peeled egg and makes the skin firm and supple. I'm wondering if the moisturizing effect lasts really well after just one application. Duration I also want to know roughly how many months it lasts lol. I'm trying to improve the barrier. Quadsay If there are any beauty veterans out there who have been getting this consistently, please leave some real-life tips.