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21. Drink Water
Drinking plenty of water helps plump up your skin because the cells fill with H2O, tighten, and lock in the moisture with a skin barrier. This will help reduce the look of fine lines, sagging, and dullness, so make sure you get your eight glasses in a day.

"It might sound boring – but hydration is super important for plump skin. Dry skin also wrinkles faster, so make sure you have plenty of great moisturizing products in your routine," Dr. Neuser says.