Collagen is the most common protein in your body. Your body produces less as you age, which causes wrinkles and stiff joints. You can boost your collagen intake by using: Hyaluronic acid. Vitamin C. Aloe vera gel. While it can be beneficial as a skincare product, you can also take it as an oral supplement. Ginseng. Antioxidants. Try adding blueberries and green tea to your diet.