In your 40s, the skin concerns you associate with aging—like wrinkles, dryness, fine lines, and sagging—become much more visible. Hormones play a major role in your skin changes—you have brighter skin when estrogen levels are high, so when estrogen levels start to decrease in your 40s, so does your natural glow. Low estrogen production also leads to a loss of collagen, bone depletion, sagging skin, and deeper fine lines and wrinkles.
High levels of collagen keep skin flexible and elastic, but the body loses 1% of its collagen stores every year starting around age 20. This means by the time you reach your 40s, your supplies are diminishing. Skin becomes thinner and less elastic as production of collagen decreases, resulting in a loss of volume and increased appearance of wrinkles.
To top it off, you may experience dry skin, dark circles under the eyes, a rougher skin texture, and the visible results of environmental damage like sunspots from sun damage in your 40s. That's why the skincare ingredients you choose when you're over 40 should focus on boosting hydration levels and repairing damage.