Frequently asked questions

Your visit starts with a short consultation and a body composition analysis. We measure your chosen areas and note the numbers. Then 45 minutes on the treatment bed: light energy helps your fat cells open and release their stored fat, gentle pulses activate your muscles, and your skin is firmed — all in one session. Afterwards we measure again, together, and you see your result in centimetres before you leave.

SLIM Body is the full 45-minute session — fat reduction, muscle activation and skin firming in one. SLIM EMS is 30 minutes of muscle activation on its own, for abdomen, arms, legs or glutes. SLIM Face is 20 minutes of gentle muscle stimulation for jawline, double chin and contour. SLIM Flow is a 25-minute add-on of gentle pressure waves that supports your body's natural clearing process, best taken directly after SLIM Body. For your skin, add LED Mask – Lift & Glow: red light plus a serum matched to your skin, during your SLIM Body session or on its own.

Abdomen and waist, hips and flanks, upper arms, thighs and legs, back. Two to three areas per session — your therapist decides with you after the measurement, so your 2–8 cm total comes from where it matters most to you. You can switch areas from session to session.

SLIM Body is about centimetres, not kilos. You lose circumference where you want it, and the scale may barely move — fat is light, shape is what you see. The released fat is processed by your body over the next 24–48 hours. How the result holds depends on your lifestyle: food, movement, sleep and hydration. A series of sessions helps the result build and hold.

Weight loss in Bangkok: where SLIM fits

There is no fixed number. After your trial your therapist goes through your measurements with you and suggests a plan around your goals — you are never asked to decide before you have seen your own result. For lasting results we recommend two sessions a week. Short on time — an event coming up, or only a few days in Bangkok? More frequent sessions are fine too; your therapist plans the rhythm with you.

Yes. Every SLIM treatment is for women and men.

SLIM Body works on the fat just beneath the skin, so it suits most body types, from a little stubborn fat to larger areas. Your therapist goes through your health history with you before your first session.

Simple: lose 2–8 cm total in your SLIM Body trial — or your money back. We measure your circumference at the same points immediately before and after your session, and the total is the sum of all measured areas. You see your result before you leave. This guarantee is exclusive to your trial session.

Every treated area is measured at the same marked points, under the same conditions, immediately before and immediately after your session. Both numbers are written down and shown to you. “Total” is the sum of all measured areas — and that total is what your guarantee is based on.

The money-back guarantee is exclusive to your trial session — the session designed to let you judge the result on your own body before you decide anything further. From your second session on, you already know what SLIM Body does for you.

Yes. SLIM Body is non-invasive and painless, using certified European technology. You feel rhythmic muscle contractions, gentle pulses and mild warmth — like a light workout while you relax — and the intensity is adjusted together with you. Before your first session we go through your health history together, and if anything is unclear, we'll always check with you first.

A few conditions mean the treatment isn't suitable: pregnancy and breastfeeding, a pacemaker or another implanted electronic device, epilepsy, a current cancer diagnosis, a metal implant in the treatment area, or an acute infection. If you have a heart condition, high blood pressure or take regular medication, please tell us before booking — in many cases a short note from your doctor is all we need.

See the full list for each treatment

Most clients notice nothing beyond slight warmth or light redness in the treated area, which settles within a few hours. After SLIM EMS a mild muscle feeling the next day is normal — like after training. Tell your therapist straight away if anything feels uncomfortable during the session.

Before: nothing but water for about 90 minutes, drink water through the day, and wear comfortable underwear — the treatment is done in underwear, disposable wear is available. After: again nothing but water for 90 minutes, then 1.5–2.5 litres of water a day for two days, enough protein, and light movement. For the very best result, skip carbohydrates for 24 hours. No downtime — most clients go straight back to their day.

All before-and-after tips

SLIM Body trial ฿3,990 (with our money-back guarantee), single session ฿6,990. SLIM EMS trial ฿1,790, single ฿2,790. SLIM Face ฿2,490. LED Mask – Lift & Glow ฿2,490 on its own, ฿1,990 as an add-on to SLIM Body. Add-ons: SLIM Flow ฿1,990, LED Mask red light ฿490. Packages are put together with you at the studio after your trial, around your goals and your measurements — a package only makes sense once we have measured you.

All treatments and prices

Online in under a minute — pick your studio, pick your time, done. Or message us on LINE @SLIMBKK and we'll arrange it for you. No prepayment needed: you pay at the studio after your session — cash, card or PromptPay.

Yes. Reschedule or cancel through the link in your Fresha confirmation, or message us on LINE. Please give us at least 24 hours so we can offer the slot to someone else. Running late? Let us know — we'll keep your slot where we can, though a shorter session may be needed.

SLIM | Sukhumvit 24 — a short walk from BTS Phrom Phong, open daily 09:00–21:00. SLIM | Thonglor 13 — easily reached from BTS Thong Lo, open daily 10:00–19:00. Both studios offer the full range of treatments except SLIM Flow, which is available at Sukhumvit 24 only — pick whichever is easier for you.

Sukhumvit 24Thonglor 13

SLIM | Sukhumvit 24 is a short walk from BTS Phrom Phong. SLIM | Thonglor 13 is easily reached from BTS Thong Lo. Both are on the BTS Sukhumvit Line.

Yes, if a bed is free. Message us on LINE @SLIMBKK first and we'll tell you the next free time, often the same day.

Yes. Your trial shows its result in one visit. For more sessions during a short stay, more frequent sessions are fine; your therapist plans the rhythm with you.