Our Calciumherbs Posture Enhancement Patches contain Glycyrrhiza Glabra (Licorice) Leaf Extract, Riboflavin, Collagen. It can promote the absorption of calcium, lock calcium in the bones, play a strong tendons and bones, and help the healthy growth of bones. Its use method is very simple: after washing your feet, take a piece of this product and stick it on the sole of your feet for 6-8 hours. It can nourish the bones, promote optimal growth, transport essential nutrients and oxygen to the bones, and promote bone development and strength.