What is the difference between collagen injections and dermal fillers?

This is largely correct. Hyaluronic acid (HA) filler can be reversed by dissolving it with a degrading enzyme called hyaluronidase, but collagen-stimulating injections such as PLLA make it difficult to immediately reverse the collagen production response that has already been induced.

Because of this difference, it is important to carefully plan the dose and injection sites for collagen injection from the start. For reference, Heal House's JUVGEN is not a typical dermal filler but a method that uses CO₂ and HA to induce autologous collagen, and it is classified closer to the collagen-stimulating category.

Whether it can be reversed is an important consideration when choosing a procedure. Therefore, it is advisable to make a decision after thoroughly consulting with a specialist based on your skin concerns, desired changes, and preferences for post-procedure management.

HA filler generally lasts from several months to a little over 1 year depending on the product and area, while the PLLA type is reported to show longer-lasting improvement as the induced collagen settles in.

The improvement effect of Sculptra (PLLA) is generally reported in various clinical data to last about 2 years, but this varies depending on the individual's collagen production capacity, the treated area, and the number of sessions. The duration of filler also varies depending on the area of use (e.g., mouth corners with much movement vs. cheekbones) and the product. Even in clinical practice, even with the same product and dose, the duration varies greatly by individual, so we recommend setting maintenance goals and management schedules through consultation tailored to you.

If you want 'naturalness that changes gradually,' collagen-stimulating injection has strengths; if you want to 'immediately and clearly fill a desired area,' dermal filler has strengths.

However, naturalness depends not only on the type of procedure but also on the amount injected, injection site, design, and the practitioner's approach. Filler can also look natural if used in appropriate amounts in a balanced way, and collagen injection can look unnatural if overdone.

This is often possible. Some people who have maintained filler switch to collagen-stimulating injection for a more natural direction or longer duration. However, the plan must consider the presence and location of any remaining filler and the current volume distribution of the face.

If existing filler remains and additional volume is induced, it may become excessive beyond what is desired, so it is safer to evaluate the current volume distribution of the face and adjust the timing and dose of the switch. If necessary, existing HA filler may be adjusted before proceeding.

The approach to switching varies depending on the individual's procedure history and current condition, so it is advisable to inform your specialist of your previous procedure details accurately and decide after consultation.