Hydroxyapatite is a naturally occurring mineral. It is a component of bones and teeth. The substance has been used for years in dentistry, orthopaedic surgery, otolaryngology and ophthalmology. Due to its properties, calcium hydroxyapatite is also used in aesthetic medicine in the form of tissue biostimulants. It is administered by injection into subcutaneous tissues. Hydroxyapatite is a filler for correcting tissue defects, modelling facial features and reducing wrinkles. It naturally stimulates the formation of new collagen fibres. Thanks to its complete biocompatibility, it is perfectly absorbed and tolerated by the body. Tissue stimulators containing hydroxyapatite have a regenerative and restorative effect. They have a visible effect on the quality and condition of the skin. They are valued by doctors and patients for their immediate filling effect, which will improve with the production of new collagen fibres by the skin. Treatment with calcium hydroxyapatite is always preceded by a consultation with a doctor of aesthetic medicine. During the interview, the specialist not only determines the patient's needs and expectations, but also rules out possible contraindications. The injection procedure is minimally invasive. Punctures are made precisely with a special sterile cannula.