Cheongju body slimming esthetic: lie-down SlimOn treatment at It's J

In short

It's J Cheongju (이츠제이 청주점) is a total beauty shop in Geumcheon-dong, Cheongju, offering hair, nails, skin care and body treatments in one building. The writer had an InBody scan, then a SlimOn body treatment made up of about 30 minutes of TNT and 30 minutes of Bio Photon, and compared the before-and-after numbers. For anyone curious about a treatment you receive lying down, It's J Cheongju was an impressive pick.

Inside the Bio Photon treatment capsule

Good to know

Location
2F, Units 201–203, 250 Junggogae-ro, Sangdang-gu, Cheongju, Chungcheongbuk-do, South Korea (충북 청주시 상당구 중고개로 250 2층 201~203호)
Hours
Tue–Fri 10:00–20:00, weekends until 16:00
Closed
Every other Sunday, every Monday
Parking
Available in front of and behind the shop
InBody condition
Fast for 3 hours beforehand for an accurate scan
TNT treatment time
About 30 minutes
Bio Photon treatment time
30 minutes

as written by the visitor on Sep 9, 2026

Have you ever heard of a lie-down diet? hahaha It's a treatment I'd been curious about for a while, and I finally went and got it. I was so happy with it and the results were amazing, so please read on!

Exterior of It's J Cheongju

It's J Cheongju: location and visitor info

  • Location: 250 Junggogae-ro, Sangdang-gu, Cheongju, Chungcheongbuk-do, South Korea (충북 청주시 상당구 중고개로 250)
  • Hours: Tue–Fri 10:00–20:00, weekends until 16:00
  • Closed: every other Sunday, every Monday
  • Parking: available in front of and behind the shop

It's J (이츠제이) is a total beauty shop with everything gathered in one place: a hair salon, nails, skin care, waxing, semi-permanent makeup, body treatments and more! Being able to get all of that in a single building... honestly amazing. I spotted celebrity autographs on one wall too haha As expected of It's J!

Autograph wall inside It's J

It's split across three floors like this. I went up to the 3rd floor for my body treatment.

3rd-floor body treatment area at It's J

There's a dog in the 3rd-floor treatment room, and it's such a sweet, sweet, sweet, sweet cutie 🐾

The dog in the 3rd-floor treatment room
The dog in the 3rd-floor treatment room

The interior was really luxurious and the director was so kind 🙂

Luxurious body treatment room interior

The body treatments cover not just dieting but detox, postpartum care and even wedding prep.

Body treatment program guide

How does the SlimOn body treatment work?

The treatment I had was SlimOn, a new-concept diet where you lose weight lying down. Before the treatment, the director had a thorough consultation with me and carefully checked my body, lifestyle habits and so on!

Consultation before the SlimOn treatment
SlimOn body treatment consultation materials

She also explained the SlimOn treatment in detail haha After a body composition analysis with an InBody scan, there's the TNT treatment, which builds muscle and reduces fat, and then the Bio Photon treatment, which uses growth-ray light energy.

SlimOn treatment explanation materials

They say just 45 minutes of Photon gives the effect of 5 hours of running. Isn't that amazing? hahaha And all you do is lie there!!!

Bio Photon treatment equipment

We did the InBody scan first. That thing on the left is the Bio Photon treatment.

Gown and disposable underwear

I undressed fully and changed into a gown and disposable underwear.

Preparing for the InBody scan
Preparing for the InBody scan

For an accurate InBody reading I fasted for 3 hours before coming. (They give you all the instructions in advance!) After the scan, the director explained my body type in a way that was easy to understand.

InBody scan used to explain body type

The InBody scan is done twice, before and after the treatment, and I was so curious what kind of change there'd be.

InBody scan results before the treatment

The TNT treatment felt like an ab workout

After the InBody scan, we started with the TNT treatment. TNT is a muscle therapy & body slimming treatment that builds muscle and reduces fat, plus a womb therapy using a pelvic floor chair.

TNT body treatment equipment

She placed it on my abdomen, and all I had to do was lie there!! hahaha I think it's even better because you can focus the treatment on whichever area you want.

TNT treatment focused on the abdomen

The intensity is adjustable too, and the director checked in with me step by step and set it to a level that was comfortable for me. Can you see the slight twitching in the video?! My belly kept flinching and quivering haha It really felt like doing an ab workout.

Abdominal stimulation during the TNT treatment
TNT treatment in progress

Bio Photon treatment and the InBody before-and-after

After about 30 minutes of TNT, I had the Bio Photon treatment. Bio Photon uses growth-ray light energy to flush out waste and toxins and promote fat breakdown, they say.

Inside the Bio Photon treatment capsule

For this one you also just get into the capsule and lie there for 30 minutes. Every single treatment is done just by lying down hahaha There's a phone holder so you can put on a video and watch, but it was so warm and cozy I got sleepy 😌

InBody before and after the treatment

InBody comparison data before the treatment

Before

InBody comparison data after the treatment

After Weight 0.4kg ↓ Skeletal muscle mass 0.6kg ↑ Body fat mass 1.4kg ↓ Visceral fat level 1 level ↓ Visceral fat area 4cm ↓

InBody before-and-after results

Isn't that amazing? I just lay there for an hour, and my body fat really went down while my skeletal muscle mass went up. I'd been so curious whether you could really diet comfortably lying down, and seeing it in the results made it even more, more, more surprising. I think this would be a big help for anyone preparing for a diet, detox or postpartum care 👍 It's J, the Cheongju esthetic for dieting, gets my full recommendation ~@

Where it is

It's J Cheongju Esthetic이츠제이 청주점 에스테틱

2F, Units 201–203, 250 Junggogae-ro, Sangdang-gu, Cheongju, Chungcheongbuk-do, South Korea (충청북도 청주시 상당구 중고개로 250 2층 201~203호)충청북도 청주시 상당구 중고개로 250 2층 201~203호

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