Skin boosters: what is the difference between Rejuran and Juvelook?

“Which is better, Rejuran or Juvelook?” “Can I have both?” “Is it the same as a salmon injection?”

These are the questions people most often get stuck on when exploring skin boosters.

To be candid, there is no answer that one is better. The products do different jobs inside the skin. Ranking different purposes can leave you disappointed whichever you choose.

In consultation, I first ask what concerns you, rather than which product you want. The answer determines the product—not the other way around.

Different ingredients do different jobs

“Aren’t they both injections that make collagen?” The answer is that this is only partly correct. Rejuran HB’s main ingredient is PN, polynucleotide extracted from salmon DNA. PN is known to create an environment favorable to regeneration in damaged dermis. It may gradually improve texture and elasticity in skin thinned and roughened by repeated irritation and aging. Rather than a dramatic visible effect, the direction is a steady recovery of the skin’s foundation.

Juvelook Skin works differently. Its main ingredient, PDLLA, does not itself fill the skin, but stimulates it to produce collagen. The aim is for collagen generated over the following weeks to support fine lines, pores, and areas with diminished elasticity from within. By analogy, Rejuran is like preparing the soil of a dry field, while Juvelook is like building pillars in that field. You cannot simply put pillars into damaged soil, nor keep preparing soil where pillars are needed. Different ingredients mean different purposes, which require different selection criteria.

Why “which is better?” is not the right question

This is the most frequent question in consultation, yet it has no single correct answer. There is no universally better procedure, only what the skin needs now. If lasers or frequent treatments have left skin sensitive and rough, Rejuran, which supports a regenerative environment, may be considered before further tissue stimulation. If the surface is relatively healthy but pores look enlarged and fine lines or hollowing are the concern, Juvelook’s collagen stimulation may be more relevant.

The area also matters. For thin, sensitive skin around the eyes, improving texture and the regenerative environment is often considered before structurally supporting tissue. In thicker areas such as cheeks or forehead, there may be more scope for a collagen-stimulating approach. Even within one face, the answer can differ by area.

Some ask, “Will both make it twice as good?” No. Their roles may not overlap because they work on different aspects, but effects do not add up arithmetically. Adding an unnecessary procedure may only increase the recovery burden. The order is to assess skin condition and set the purpose, rather than arrive with a product already chosen.

With combination treatment, order and intervals are half the plan

Some skin does need a combination, particularly when rough texture and reduced elasticity coexist. We may first use Rejuran to establish a regenerative dermal environment, then add Juvelook’s collagen stimulation several weeks later. Both usually involve sessions 2–4 weeks apart, so what is given when within the full schedule matters. Even the same ingredients can produce different results with different order and intervals. Previous treatment history must also be checked: what ingredient was placed in which area can change the new plan, so sharing what you remember helps safer planning. Combination is not always the answer, however. One procedure is often enough depending on thickness, damage, and past treatment.

How we diagnose

The first thing I tell people exploring skin boosters in Cheongdam is that product choice follows diagnosis. Besides Rejuran and Juvelook, LUNN offers boosters with different characteristics, including hydrating injections, Skinvive, Elravie Rituo, and CellreDM. More choices mean diagnosis matters more. In our single-doctor system, I personally conduct consultation, treatment, and progress checks. At the first consultation I assess the skin and what is needed; avoiding unnecessary additions is part of the design too. Care is private in individual rooms, and we are 1 minute from Exit 4 of Apgujeong Rodeo Station, making repeat visits easier.

Both are injections and may cause redness, bruising, or swelling at the treated area, and rarely nodules. The degree and speed of effects vary, so it is most accurate to discuss them based on the skin assessed in consultation.

Before choosing Rejuran or Juvelook, first determine whether the skin currently needs regeneration or volume. Any clinic that helps make that distinction is a reasonable place to start.

Related columns: Skin-booster effects: why not inject a lot at once? · Hydrating injections: why do my results fade so quickly? Related treatment information: Skin boosters