HarmonyCa is an injectable that stands out due to the cross-linked Hyaluronic acid that is embedded with Calcium Hydroxyapatite microspheres. Calcium Hydroxyapatite is known for its abilities to stimulate the collagen production in the skin. While the Hyaluronic acid forms a supporting extracellular matrix HarmonyCa gives an instant beautiful result that will last long after the body has broken down the gel. HarmonyCa is manufactured by Allergan.