SEOLREIM · JOURNAL
Are ONDA body results permanent? Fat changes, skin firmness, weight gain and maintenance planning
Full translation of the Korean article. Translation checked for completeness, numerical consistency and medical meaning; separate medical review of this translation is pending. Translation updated: 2026-10-28.
Having ONDA body treatment does not mean that changes in fat, skin firmness and the appearance of cellulite will all last permanently. The mechanism of fat-cell damage and how much your own body actually changes and how long that change remains visible are different questions. Fat-cell destruction or the same contour change cannot be guaranteed for everyone, and changes in the size of remaining fat cells, weight gain and skin aging also affect appearance. At SEOLREIM Clinic, discuss a maintenance plan that considers remaining fat, loose skin and weight changes separately, rather than repeating treatment at fixed monthly intervals.
When reading about durability, check how long follow-up lasted after the final treatment
Public questions include “Have you seen permanent fat reduction?”, “Does it last at least 6 months?” and “How many treatments are needed each year?” Answering requires aligning the start of observation and what was assessed. An abdominal study of 19 people (PMID 37638988) used 3 treatments at 4-week intervals. The “3-month follow-up” in its abstract corresponds, according to the schedule in the full text, to about 12 weeks from the start of treatment; final circumference and photograph assessments were 4 weeks after the last session. Describing this as maintenance for 3 months after the final treatment extends the period. A cellulite study of 26 people (PMID 35159968) assessed the buttocks and posterior thighs 3 months after the last of 4 treatments. Both studies provide data on short-term changes in appearance; neither tracked fat-cell counts throughout life or compared annual maintenance schedules.
| Current condition | Causes and goals to reassess | Direction to consider in a maintenance plan |
|---|---|---|
| Weight is stable, but pinchable localized fat remains | Check previous treatment boundaries, remaining fat thickness, whether enough time has passed for assessment and the actual response | After examining whether the initial response was limited or goals remain, compare the expected benefits and risks of further treatment |
| There is little fat, and skin wrinkles or folds are the main concern | Separate excess skin and reduced firmness from a goal of reducing fat | Rather than repeating fat reduction, discuss the limits of tightening and whether substantial excess skin needs surgical assessment |
| Uneven cellulite becomes noticeable again | Check skin appearance in the same posture, swelling, weight changes and surface depressions | Distinguish reassessment of cellulite from renewed fat gain, and do not promise permanent removal on the basis of short-term improvement |
| Weight has increased and several areas have become larger | Also assess overall weight trends, changes in lifestyle or medication, and changes outside the treated area | Discuss whether weight and health management should come first; contour changes alone do not establish that ONDA has stopped working or that fat cells have regenerated |
| Still losing weight, or planning a major weight change or pregnancy | Check target weight, rate of change, skin and abdominal-wall changes, and the possibility of pregnancy | Reassess treatment suitability and assessment timing instead of prepaying for a maintenance course while contours are changing |
| Weight and appearance are stable, and you are satisfied with the current result | Check whether there is a specific new concern to treat or any functional or skin symptoms | Continue observation and seek another consultation when needed, rather than repeating treatment solely because 6 months or 1 year has passed |
Definitions and how the treatments work
ONDA uses 2.45GHz microwaves and contact cooling to induce tissue responses in selected areas. Changes in the fat layer and remodeling of skin and fibrous structures are not the same outcome, and a reduction in circumference does not reveal how much the number of fat cells has decreased. Even if actual fat reduction occurs, remaining fat cells can enlarge with weight gain, while skin firmness continues to be affected by aging and weight fluctuations. Therefore, the possibility of fat-cell damage, long-term contour maintenance and sustained skin firmness should not be grouped together as a single permanent effect. The FDA also advises that noninvasive body contouring is not a treatment for obesity or weight loss, and that the desired response may not occur or results may be temporary.
Potential benefits and limitations
This does not mean there are no longer-term data at all. A separate 9-month report (PMID 38196900) retrospectively reviewed records of 7 women who received 3–8 abdominal treatments and returned 9 months after their last treatment. Limitations include the lack of a control group, the sample size and selection of returning patients; average weight also changed, and the authors included an employee of the manufacturer’s group. A weight difference that was not statistically significant is not evidence that weight stayed the same. Meanwhile, a paper with 1-year follow-up (PMID 37522509) was retracted in month 1 of 2026 (notice PMID 41520135). The publisher stated that reliability could not be assured because of problems with peer-review and research-ethics procedures, so its efficacy findings are excluded from evidence on maintenance. This retraction does not prove that ONDA has no effect at all, but it cannot support a claim that a paper guarantees results for 1 year.
Who can seek a consultation and how suitability is assessed
Adults with relatively stable weight and a clear goal concerning localized contours or skin appearance may be candidates for consultation. Disclose pregnancy, breastfeeding or plans for pregnancy; surgery, liposuction, hernia or separation of the abdominal muscles; metal or electronic implants; sensory or circulation problems; wounds, infections, skin disorders and medications. Maintenance treatment requires the same suitability checks as initial treatment. Unexplained abdominal protrusion, swelling, pain or rapid weight changes may require medical assessment of the cause before booking a cosmetic procedure.
Procedure, recovery and scheduling
At the start, define assessment goals individually for fat bulges, skin wrinkles and cellulite, and record weight and the treatment area. After checking the actual model, handpiece, treatment extent, recovery and costs with the SEOLREIM physician, set a date to assess the response to the initial treatment separately from the criteria for deciding on additional treatment. An observation date is not automatically the next treatment appointment. After returning home, keep photographs and area records under the same conditions as before, together with weight trends and other treatments, to help interpret the cause of changes. Do not finalize the result before initial warmth, swelling and tenderness have subsided, or calculate an individual maintenance duration from the average for a repeated course. Warmth, swelling and tenderness can persist for several days or longer; adjust the timing of your return to activities to your individual response.
Side effects, contraindications and symptoms requiring medical attention
Possible adverse effects include burns, blisters, redness, swelling, bruising, persistent pain, altered sensation, nodules and uneven contours. Cooling does not guarantee painless or injury-free treatment, and risks must also be assessed before additional sessions. Report intense localized heat or sharp pain immediately during treatment. Afterwards, seek medical assessment for blisters, oozing, skin-color changes, persistent tingling, worsening pain or lumps. These changes are not a reason to assume that the effect has worn off and heat the area again. Exercise, sauna use, massage and flights should be planned according to the actual response and the instructions you receive.
Follow-up timelines in ONDA durability data and the conclusions they support
| Category | Role and goals | What to check |
|---|---|---|
| Abdomen, 19 participants, PMID 37638988 | 3 sessions at 4-week intervals; final circumference and photographs 4 weeks after the last treatment | Distinguish the overall schedule of about 12 weeks from maintenance after treatment; this does not establish permanent fat reduction or a maintenance interval |
| Buttocks and posterior thighs, 26 participants, PMID 35159968 | Assessment of cellulite, circumference and other measures 3 months after the last of 4 treatments | Short-term data on surface appearance; cannot be extended to abdominal fat-cell counts, lifelong firmness or the annual number of treatments |
| 9-month abdominal report, PMID 38196900 | Retrospective assessment of 7 women returning at 9 months after 3–8 treatments | A small signal from longer-term observation; consider the absence of a control group, weight changes, selection bias and conflicts of interest |
| Retracted 1-year paper, PMID 37522509 | Publisher’s retraction notice dated 2026-01-10, PMID 41520135 | Excluded from evidence on effectiveness, safety and duration; not used as evidence of permanence or the need for regular maintenance |
Questions and answers for a medical consultation
These questions for a consultation before visiting SEOLREIM are based on the literature. They are not a clinician interview or an individual prescription. This new article is awaiting confirmation of a separate review by a medical professional.
Q. If fat cells are damaged, will fat never return?
A. This cannot be guaranteed. The same reduction in fat cells has not been demonstrated for every treatment, and the size of remaining cells, weight and skin condition can change appearance. Contour changes after weight gain neither diagnose fat-cell regeneration nor prove that ONDA had no effect at all.
Q. Do I need ONDA body maintenance every 6 months, or a certain number of times each year?
A. No comparative evidence establishing an interval or annual number applicable to everyone has been identified. If you are satisfied now, observation is an option. Decide with the SEOLREIM physician whether to have further treatment based on remaining goals for fat, skin or cellulite, your response and the risks.
Q. I heard there is a paper showing 1-year maintenance. Can I rely on that duration?
A. PMID 37522509 has been retracted and cannot be used as evidence of effectiveness. The separate small 9-month report does not guarantee an individual duration either. Ask for an explanation that checks the paper’s final treatment date, assessment measures, control group, weight changes and current retraction status.
Consultation with the SEOLREIM clinic director and signature programs
The official ONDA lifting menu of SEOLREIM Clinic/SEOLREIM confirms body applications to the abdomen and thighs. Direct consultation and treatment by the physician, together with the principles of genuine products, correct quantities and attentive care, provide a basis for checking the current model, extent, goals and actual treatment details. The menu’s term “semipermanent” is not a clinical finding establishing fat-cell destruction in everyone or how long skin firmness lasts. At return visits, begin by checking remaining goals and weight changes; do not assume a maintenance course that requires additional treatment at fixed intervals even when nothing has changed.
Booking, languages, location and guidance for international visitors
If you are looking for an ONDA maintenance course at a dermatology clinic in Gangnam or Seoul, prepare your weight trends and remaining goals before returning to a clinic near Gangnam Station or elsewhere in Korea. Tell SEOLREIM your previous treatment dates and areas and your current concerns, so you can first discuss reassessment and observation rather than calendar-based repeat bookings. The official international-patient guide states that resident English- and Chinese-speaking staff assist consultations and that interpretation in 14 languages is available by advance reservation; booking before your visit is required. SEOLREIM Clinic is on floor 11 of Gangnam8258 Building, 376 Gangnam-daero, Seoul, about 1 minute from exit 3 of Gangnam Station. For Korean-language consultation and appointments, use the KakaoTalk, Naver Booking or telephone channels below; for consultations about visiting from abroad, use the International consultation link. Provide the treatment of interest, skin concerns, dates of your stay in Korea, preferred language and whether you need interpretation. Confirm the actual scope of language support, costs, booking confirmation and cancellation terms before visiting. Examination may show that same-day treatment is difficult or that follow-up after returning home is needed, so also discuss how to contact the clinic about adverse reactions and the actual scope of aftercare.
Evidence sources and related articles
FDA: limitations, durability and risks of noninvasive body contouring: https://www.fda.gov/medical-devices/aesthetic-cosmetic-devices/non-invasive-body-contouring-technologies ; abdominal study of 19 participants, PMID 37638988: https://pubmed.ncbi.nlm.nih.gov/37638988/ and publicly available full text https://link.springer.com/article/10.1007/s00105-023-05200-y ; cellulite study, PMID 35159968: https://pmc.ncbi.nlm.nih.gov/articles/PMC8836637/ ; separate small 9-month report, PMID 38196900: https://pmc.ncbi.nlm.nih.gov/articles/PMC10774843/ ; retraction notice, PMID 41520135: https://pubmed.ncbi.nlm.nih.gov/41520135/ and https://onlinelibrary.wiley.com/doi/10.1111/srt.70317 . PMID 37522509 was used only to check the retraction record and was excluded from evidence on effectiveness, safety and maintenance. Review with actual questions about permanence: https://www.reddit.com/r/KoreaSeoulBeauty/comments/1qnizzs/evers_clinic_review_my_experience_getting_onda/ and the associated comments https://www.reddit.com/r/KoreaSeoulBeauty/comments/1qnizzs/comment/pe90zdz/ ; questions about 6 months and annual treatment frequency: https://www.reddit.com/r/K_beauty_insider/comments/1q1gdt4/insider_list_the_only_3_procedures_worth_your/ ; questions about permanent fat reduction and observations of promotional responses: https://www.reddit.com/r/KoreaSeoulBeauty/comments/1ntkjae/tried_onda_lifting_heres_what_you_should_know/ ; confirmation of actual availability: https://www.sulskin.co.kr/treatments/onda-lifting . Facial experiences in reviews were not extrapolated to body effects, and claims of permanence in community discussions or the official menu were not adopted as medical facts. General FDA guidance is not evidence of authorization for a specific ONDA model. Checked: 2026-10-26. Separate medical review of the new manuscript is awaiting confirmation. Official SEOLREIM language and booking information (checked 2026-10-26): https://www.sulskin.co.kr/international-patients/en/ . Before booking, confirm your preferred language, interpreter availability on the date and costs. Evidence and official information checked: 2026-10-26.
Related article: ONDA lifting body contouring: microwave principles, effects and adverse effects https://www.sulskin.co.kr/pages/ko/product-245 / Should ONDA and InMode body results be judged by weight or circumference? A comparison record after returning home https://www.sulskin.co.kr/pages/ko/product-377 / Is just 1 ONDA body session in Korea an option? Choosing between a single trip and a course of sessions https://www.sulskin.co.kr/pages/ko/product-383 / Can ONDA improve loose abdominal skin after childbirth? The difference between fat reduction and tightening https://www.sulskin.co.kr/pages/ko/product-401 / ONDA versus cryolipolysis: what should you compare for body treatment in Korea? Fat, skin texture and recovery https://www.sulskin.co.kr/pages/en/product-425
Authorship, review and dates
Written by: SEOLREIM content editor (AI writing assistance) / Literature and image editorial review: 2026-10-26 / Medical reviewer: unassigned · Medical review incomplete / Publication and update: 2026-10-27. General medical information; not a substitute for individual diagnosis or prescribing.
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