If you are excelling in your workout game and your eating habits are also mindful, then no one can stop you from losing weight. However, an unexpected consequence of losing weight is loose skin. Today we will learn How To Tighten Loose Skin. Our skin is like an elastic balloon. It is made of collagen and elastin proteins. Collagen protein gives structure to our skin and elastin gives elasticity to our skin which helps to keep it firm and tight.