
The RHA Collection of resilient hyaluronic acid (HA) fillers include RHA 2,3,4, and Redensity
What is the RHA® Collection?
The RHA® Collection, also known as Resilient Hyaluronic Acid (HA) dermal filler, is designed specifically for use in areas with dynamic facial movement. The collection represents the latest advancement in HA technology in more than a decade. The RHA® Collection uses a gentle manufacturing process to more closely resemble the natural HA found in the skin. The collection includes 4 different HA-filler formulations. RHA Redensity™ is a weightless filler that smooths delicate lip lines. RHA® 2 and RHA® 3 offer elegant and refined smoothing for those seeking a soft, natural look in dynamic wrinkles and folds (such as the nasolabial folds and temples), and RHA® 4 builds structure and natural volume in larger areas such as the cheeks, chin, or jawline.
What is RHA Redensity?
RHA Redensity is a weightless filler that smoothes fine lip lines, creating a natural airbrushed effect. It doesn’t add any volume, but rather is injected superficially into the epidermis to smooth fine lines and even scarring.
Where can Redensity be used?


What is RHA 2,3 and 4?
The most popular area to treat is the perioral area. Redensity is injected superficially, just below the skin to smooth stubborn lip lines. A thorough consultation with Dr. Emami will determine the most appropriate use of Redensity for you.
RHA 2 and 3 are most commonly used for the correction of moderate to severe facial wrinkles and folds, such as nasolabial folds.
RHA 4 can be used to replace volume loss and build back structure in the cheeks and chin.
Are there any reasons why I should not receive RHA?
Our top priority is quality care and safety for our patients. It is required that every patient receive an in depth and comprehensive consultation before any treatment.
What are the possible side effects?
The most common side effects may include injection-site redness, swelling, pain, tenderness, firmness, lumps/bumps, bruising, discoloration and itching. Side effects may vary on a case by case basis and the patient’s medical history.
When will I see results and how long will they last?
Dermal filler injection results are instant. The results from the RHA® Collection of fillers can typically last up to 15 months in dynamic wrinkles and folds and 1 year in lip lines.
RHA® 2, RHA® 3, and RHA® 4 were shown in two 15-month studies for continued improvement in wrinkles and folds. RHA Redensity™ was studied in a 12-month study for lipstick lines—in which 2/3 of participants still had lipstick-line improvement after 12 months.
How much do fillers cost?
The cost of an RHA® Collection treatment will vary based on your individual aesthetic goals and the treatment plan that Dr. Emami helps design for you. Your geographic location, the number of syringes used, and the experience level of your provider are all key pricing factors. Dr. Emami has over 30 years experience and takes a significant amount of time with each patient when determining which treatment will give you the most optimal results.
Oftentimes, Dr. Emami will recommend a variety of different fillers for optimal results. In these cases, patients can join our loyalty program called “Y-Lift.” Patients who are in our Y-Lift program receive significant savings per syringe.