Hyaluronic acid fillers: a comprehensive review.

Over the past decade, the popularity of nonsurgical cosmetic procedures has increased exponentially. Last year, according to the American Society of Aesthetic Plastic Surgery, more than 5 million procedures were performed using cosmetic injectables such as botulinum toxin and dermal filling agents. According to the society's recent statistics, more than 85% of all dermal filler procedures occurred with a hyaluronic acid derivative.These numbers are expected to rise in the future as there is currently no other class of filling agent that rivals the popularity of hyaluronic acid. The popularity of hyaluronic acid specifically stems from its effectiveness, ease of administration, and safety profile.