Understanding Skin Structure
Why Your Skin Ages: The Structural Breakdown
Your skin has three main layers, and the magic happens in the middle one called the dermis. This layer is packed with collagen (makes up about 75% of skin's dry weight) and elastin (gives skin its bounce-back ability).
As you age, several things happen simultaneously: collagen production drops dramatically (about 1% per year after age 30). The collagen that remains gets damaged by UV exposure and oxidative stress through a process called cross-linking, which makes it stiff and less functional. Meanwhile, elastin degrades, enzymes called matrix metalloproteinases (MMPs) start breaking down more collagen than your body can replace, and hyaluronic acid (which holds water) depletes.
"Your skin is literally losing the proteins that hold it together and the moisture that keeps it plump."
This is where peptide therapy becomes powerful. Different peptides attack this problem from multiple angles - some stimulate collagen production, some protect existing collagen from degradation, some improve hydration, and some even trigger healing responses that restore skin's natural regeneration.