Skin booster types vs. treatment interval,

why the ingredients fall into three categories

“Rejuran, Juvelook, and Revive,

aren’t they all basically the same?

I’m not sure which one I should get”

There are so many people who feel this way.

Today, I’ll walk you through the reason step by step.

Skin boosters, not just the same name

they are actually divided into three categories

Skin boosters are

procedures that are injected directly into the dermal layer to supplement

collagen, moisture, and regenerative factors.

It’s an umbrella concept, not the name of a single procedure.

Unlike fillers, which add volume

, the goal is to change the skin’s ‘texture’ itself.

So even within the same skin booster,

depending on which ingredients it contains

the results and treatment interval can be completely different.

Why are the intervals 2 weeks, 1 month, and 3 months

so different?

Key insight from Dr. Wi Young-jin

Skin boosters can be broadly divided into three categories.

Collagen induction (1 month),

PN regeneration (2 weeks), HA hydration (3 months).

Once you know only the ingredient category,

the interval is automatically determined.

Rather than memorizing a hundred procedure names,

these three distinctions matter far more.

First are collagen-induction agents (such as Juvelook).

They work by encouraging your body to build collagen itself.

Because time is needed for new collagen to build up,

we usually perform a series of 3–4 treatments

at one-month intervals.

Second are PN regenerative treatments (such as Rejuran HB).

Made from ingredients extracted from salmon DNA,

they help support cell regeneration.

Because they are absorbed quickly in the body, they need to be

done at 2-week intervals

for the cumulative effect to show properly.

Third are HA hydrating treatments (such as Revive).

They directly replenish moisture in the dermal layer

for an immediate effect.

Since the results usually last about 3 months,

many people come in for a maintenance treatment once every season.

A 45-year-old patient who had improved skin texture with Rejuran last spring

came back recently concerned about sagging cheeks.

At that point, rather than a regenerative factor (PN),

it was time to move to a collagen-induction agent,

so I adjusted the consultation plan.

Even for the same person, the ingredient category needed

can change within just 6 months,

depending on the skin’s condition.

Dr. Wi Young-jin’s key summary

Don’t memorize procedure names;

just distinguish the three ingredient categories.

Collagen induction (1 month)·PN regeneration (2 weeks)

·HA hydration (3 months).

If you know just these three paths, “What should I get now?”

you’ll have 90% of the answer.

Which category is right for your skin?

One important thing to mention is that

these three categories

are not substitutes for one another—they complement each other.

Depending on the skin condition, doing them sequentially or in combination

gives the best synergy.

Common questions we hear in the consultation room

Q1. Can I get all three at once?

It is possible, but not recommended.

If the stimulation to the dermal layer is concentrated all at once,

the risk of bruising or nodules increases.

Usually, we finish the regenerative (PN) series first

and then

move on to a collagen-induction agent.

Q2. Doesn’t the cost become too high all at once?

You don’t have to start by getting all three

at once.

Taking them one category at a time

is much more reasonable.

Start by addressing the most urgent concern,

observe how your skin responds, and

then move on to the next step.

Q3. I’m worried about side effects like bruising or nodules.

PN and HA treatments

tend to bruise easily because of the many needle marks,

but the bruising usually fades naturally within a week.

Collagen-induction agents bruise less,

but because of the risk of nodules, the injector’s skill and

massage guidance are very important.

If you take away just one thing today,

— remember the three paths: collagen, PN, and HA,

and the treatment intervals that go with them.

In the next article,

‘the optimal timing to move from regenerative care

to elasticity care’ will be shown with real cases.

That’s it from Dr. Wi Young-jin.

Read more

• Hip dips, can exercise fill them in? Why you shouldn’t just do squats believing that

• Collagen injections: what’s different from fillers?

• Double chin—does it come from fat first, or from loss of firmness?