As we get older our collagen and elastin start to break down, leading to skin that is loose. Dramatic weight loss can also contribute to sagging skin. Collagen supplements may help you get firmer skin, as well as bone broth, which has collagen in it. These items usually can be found in health food stores. Protein, vitamin C, and staying adequately hydrated also help the body to produce more collagen naturally. Building muscle also helps reduce the appearance of loose skin. Smoking and excessive sun exposure both affect the skin’s elasticity, so it is best to avoid these.