As we grow old, all layers of skin and adjacent areas age, whether it is the skin, the underlying fat layer, the muscle layer, or even bone. Understanding which layer impacts how and leads to what signs of aging, is crucial to understanding the kind of skin care required.
Skin Layers: The skin has two layers: the epidermis and the dermis. The epidermal layer acts as a barrier and prevents trans-epidermal water loss (TEWL). It also contains melanocytes (melanin-producing cells). As we age, the skin barrier weakens, leading to increased TEWL, making the skin dry, dehydrated, and dull. Cumulative sun exposure activates melanocytes, causing uneven skin tone, tanning, and sunspots. At the dermal layer, there is a gradual loss of collagen, elastin, and hyaluronic acid, leading to sagging skin, fine lines, and reduced elasticity.
Fat Layer: The face loses deep fat pads while superficial fat pads hypertrophy along with ligament laxity. Think of facial fat like a 3 BHK apartment where fat is distributed unevenly across the face, separated by cutaneous ligaments. As we age, fat diminishes while these ligaments stay, leading to laugh lines, marionette lines, tear trough deformity, malar festoons, and jowls. Repositioning fat and strengthening ligaments is key to maintaining structure.
Muscle Layer: Facial muscles, known as mimetic muscles, create expressions. Over time, repetitive movements lead to wrinkles. No amount of skincare can erase wrinkles; only procedures like Botox can soften them.
Bone Level: Bone loss occurs due to calcium and phosphate depletion, making bones porous and weak. This can flatten cheeks, cause chin retrusion, and result in jawline loss (gonial angle reduction). Currently, aesthetic procedures can address all aging aspects except bone loss.
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