Cheongju diet spa: one SlimOn session, body fat -2.1% at It's J

Lately I've been watching my diet while trying to lose weight, and since I've been managing everything alone with just exercise and eating habits, I started wanting to work on my overall body line, not just my weight — which is how I ended up visiting It's J Cheongju Esthetic.

The facilities were clean overall and the treatment space was pleasant, so I could get the treatment comfortably ✨ What I liked most was that it wasn't just a treatment — everything from the pre-treatment consultation and InBody measurement to the diet approach and care method was set up as a systematic program. I'd recommend it to anyone who finds exercise intimidating or has trouble figuring out their own diet direction!

• Hours 10:00–20:00 / Sat–Sun 10:00–18:00
• Closed every Monday
• Parking: lot right in front of the shop

Where is It's J Cheongju Esthetic, and is there parking?

It's J Cheongju Esthetic is located at 250 Junggogae-ro, 2nd floor, units 201–203, Sangdang-gu, Cheongju-si, Chungcheongbuk-do, South Korea, with a parking lot set up right in front of the building. The entire building operates as It's J, so it wasn't hard to find even on my first visit.

The It's J sign on the building exterior was big and easy to spot, and since it's a standalone building, finding the shop was easy.

Above all, having a parking lot right in front of the building made it convenient to visit by car. The parking spaces were close by too, so I felt like there'd be little parking stress when coming in for treatment!

Inside It's J Cheongju Esthetic: what the rooms are like

It's J Cheongju operates across a total of 3 floors, and the marble-heavy interior gave it a different feel from a typical body care shop.

The interior felt very sophisticated the moment I walked in — the clean atmosphere built around marble gave it a luxurious feel that set it apart from a typical care shop.

The It's J shop runs across 3 floors total, and the treatment spaces and facilities were well divided by floor, so it felt fairly large in scale. Everything was neatly arranged and had a luxurious atmosphere, so I felt good about getting treated from the moment I walked in :)

Consultation and InBody measurement before the treatment

The treatment I received at It's J Cheongju was the SlimOn diet program, and before the actual treatment began, I first went through a questionnaire, consultation, and InBody measurement.

The treatment this time was the SlimOn diet program! SlimOn is a program that manages the body line using TNT Muscle Therapy and Bio-photon heat therapy. I got a detailed explanation of the program,

Before the actual treatment started, I went through the consultation and filled out a questionnaire. I first filled it in to check things like what's currently bothering me while dieting, my usual lifestyle habits, and the direction I wanted for the treatment, and the consultation was based on what I wrote.

Before treatment, I changed into the prepared gown and disposable underwear, then moved to the treatment room.

After the consultation and questionnaire were done, I also had a pre-treatment InBody measurement. It checked not just my current weight but my overall body composition, including body fat and muscle mass, and based on those results I got an explanation of my current body condition and the care direction!

How the SlimOn diet program runs, step by step

SlimOn starts with TNT Muscle Therapy first, then moves on to Bio-photon heat therapy. Both are done lying down on a bed or piece of equipment.

TNT Muscle Therapy: what it feels like

First up was the TNT Muscle Therapy treatment, which I could receive lying comfortably on the bed. TNT stimulates the muscles, so it seemed like something people who don't usually exercise or don't have time due to a busy schedule could try without much burden.

It was interesting how my muscles twitched involuntarily. Rather than feeling painful, it was closer to the sensation of a muscle tensing and releasing like during a workout. The intensity could be adjusted, so it was set to a level that suited me, which made it easy to get through.

Bio-photon heat therapy: the second half of SlimOn

After the TNT Muscle Therapy, I moved on to Bio-photon heat therapy. It's done lying comfortably on the Bio-photon equipment, and it wasn't just mildly warm — as time passed, heat built up strongly in my body until I was warm enough to sweat. There was also a video set up to watch, so I didn't get bored!

My whole body gradually warmed up and I started sweating, and I was told that Bio-photon heat therapy is meant to help body circulation by warming the body this way.

InBody results after one SlimOn session

After finishing all the treatments, I had my InBody remeasured at It's J Cheongju, and it came out to body fat -2.1% and skeletal muscle mass +0.6kg. Weight was -0.4kg, and body water increased by about 0.7kg.

• Body fat percentage down 2.1%
• Skeletal muscle mass +0.6kg
• Weight -0.4kg
• Body water about +0.7kg

Usually when weight drops you might think it's just water loss, but this time body water actually increased, so I was told this wasn't simply a case of losing weight through water loss alone.

Who SlimOn at It's J Cheongju suits best

I liked that it didn't just end with checking the InBody results — they also explained the diet approach and care method suited to my current body condition 🫶🏻 Based on my everyday habits, body type, and what was bothering me, they walked me through what kind of care would work well one by one, so it felt less like just getting a treatment and more like learning the diet direction that fits my body.

From the pre-treatment consultation to the InBody measurement, diet method, and care direction, everything was guided thoroughly, so the whole process felt systematic.