The Chenot Espace at One&Only Portonovi in Montenegro sells the Chenot Method in holiday form: programs from three days, a six-day Advanced Detox from €4,250, and a resort with five outdoor pools and a private beach on the Bay of Kotor. The question is whether a shorter, gentler stay is the same intervention as the strict seven-day program at Chenot Palace Weggis, or simply a well-equipped spa with a medical consultation attached.
The question: would I do Chenot again if I could also enjoy my holiday?
Having spent a week following the Chenot program in Switzerland, I’m not entirely sure I’d rush to repeat the experience. I found parts of it interesting, but eating so little for an entire week was rather demanding.
So the idea of a Chenot Espace at One&Only Portonovi, overlooking the Adriatic, sounds appealing, especially if I could combine some of the treatments with a more normal holiday.
But then I wonder what I’m actually paying for. Is the strict diet the most important part of the Chenot Method? If I choose a shorter program or eat more normally, am I still getting the same benefits? Or is it simply an expensive spa with a medical consultation attached?
I’d be interested to know which parts of the Swiss program are genuinely worth repeating, and which I’d be perfectly happy to skip.
DailyStoke has not stayed at One&Only Portonovi, so this review is based on Chenot’s current program documents and price list, published research and independent reporting, read against our own firsthand week at Chenot Palace Weggis.
Our verdict: Portonovi offers the same core Chenot toolkit as Weggis (consultations, Lifestyle Biomarkers, energetic massage, hydrotherapy and mud) at a lower program price and in a far more holiday-like setting. Its six-day Advanced Detox is close to the Swiss program and to the trials behind it. The three- and four-day options are pleasant, but there is no published evidence that they deliver the same physiological effect.
Price: Programs from €2,220 (3 days) to €4,250 (6 days), plus 10% service charge and accommodation (checked October 2026)
Firsthand: Not visited; research-led
Chenot Espace Portonovi at a Glance
- What it is: A 4,000-square-meter Chenot Espace with 28 treatment rooms inside One&Only Portonovi, which opened in 2021 as the first One&Only resort in Europe.
- Category: Hybrid: a Chenot-branded medical-wellness spa inside a luxury beach resort.
- Programs: Advanced Detox (6 days/7 nights, €4,250), De-Stress & Re-Charge (4 days/5 nights, €3,450), Cleanse & Rebalance (3 days/4 nights, €2,220), Fitness Boost (3 days/4 nights, €2,250), plus Weekend Spa Deluxe, Chenot Day Spa and a facial program.
- Extras: A 10% service charge on all programs and services; accommodation separate.
- Diet: The Chenot Diet, listed in all four priced programs.
- Booking: Year-round, subject to availability; a booking is confirmed only after the Chenot team reviews a guest health questionnaire.
What the Portonovi Programs Include
The 2026 brochure is unusually specific, which makes a like-for-like comparison possible.
Advanced Detox (€4,250): two medical and two nutritional consultations; five diagnostics (arterial stiffness, minerals and heavy metals, oxidative stress, advanced glycation end products and skin collagen thickness); body composition analysis; a bio-energetic check-up; two bio-energetic treatments; and six each of energetic massage, hydro-aromatherapy, phyto-mud and hydro-jet.
De-Stress & Re-Charge (€3,450): one medical and one nutritional consultation; three diagnostics including a stress test with heart rate variability biofeedback; four each of the massage and hydrotherapy treatments; plus four photobiomodulation and four neuro-acoustic relaxation sessions. This is the closest relative of Weggis’s Recover & Energise, the program we did.
Cleanse & Rebalance (€2,220): one medical and one nutritional consultation, body composition, a bio-energetic check-up and three each of the core treatments. The brochure suggests repeating it “4 to 6 times during the year.”
Fitness Boost (€2,250): fitness, posture and body composition assessments, three personal training sessions and single sessions of massage and hydrotherapy.
Portonovi vs Weggis vs L’Albereta: The Advanced Detox Compared
Chenot runs its method in three formats in Europe: the dedicated Chenot Palace at Weggis and Chenot Espace spas inside luxury hotels, including Portonovi and L’Albereta in Italy’s Franciacorta wine country, whose 2,000-square-meter Espace reopened after a renovation in early 2024.
| Chenot Palace Weggis | Chenot Espace Portonovi | Chenot Espace L’Albereta | |
|---|---|---|---|
| Setting | Dedicated retreat, Lake Lucerne | Beach resort, Montenegro | Country-house hotel, Lombardy |
| Program length | 7 days, 7-night minimum | 6 days / 7 nights | 7 days, 7-night minimum |
| Program fee | CHF 5,500 | €4,250 + 10% service | €4,990 |
| Published calorie target | 850 kcal a day | Not stated | 850 kcal a day |
| Consultations | 2 medical, 2 nutritional | 2 medical, 2 nutritional | 2 medical, 2 nutritional |
| Diagnostics | Lifestyle Biomarkers, body composition, bio-energetic check-up | Five named biomarker tests, body composition, bio-energetic check-up | Lifestyle Biomarkers, bio-energetic check-up |
| Core treatments | 6 massage, 6 hydro-aromatherapy, 6 phyto-mud with hydro-jet | 6 each, plus 2 bio-energetic treatments | 6 each, plus bio-energetic treatments |
| Accommodation | Extra, from CHF 410 a night | Extra | Extra |
Prices from Chenot’s program pages and the Portonovi 2026 brochure, checked October 2026.
On paper, the three Advanced Detox programs are near twins. The real differences are the setting, the length and what surrounds the program. At Weggis, everyone around you is on the diet and the whole building is organized around it. At Portonovi and L’Albereta, you are a program guest in a hotel full of people eating, drinking and enjoying themselves. That can make the week easier or much harder, depending on your willpower.
Is the Diet Still Strict at Portonovi?
This is the heart of the question, and the honest answer is: in the programs Chenot prices, yes. The Portonovi brochure lists the Chenot Diet, described as three reduced-calorie plant-based meals a day, in every one of the four priced programs, including Fitness Boost. The resort’s longevity page describes the diet as designed to work “in synergy” with the treatments. Neither publishes a calorie figure for Portonovi, although Weggis and L’Albereta both state 850 kcal a day for their Advanced Detox.
So the flexibility on offer is mostly about length, not about eating normally while on a program. If you want treatments alongside a regular holiday menu, the route is the à la carte spa list rather than a program, which means you are no longer doing the Chenot Method in any meaningful sense. The published documents do not describe a lighter dietary alternative; if that matters to you, ask the Chenot team in writing before booking.
Does a Three-Day Chenot Stay Do the Same Thing? The Evidence
The best human data on Chenot’s diet come from Sarmad et al. (Clinical Nutrition, 2025), a randomized trial run with the University of Nottingham. Forty-six healthy adults spent seven days on an 850 kcal plant-based fasting-mimicking diet, in a low- or higher-protein version, or on a normal control diet. Both diets reduced weight by about 2.4 to 2.7 kg, cut fasting glucose by about 10% and IGF-1 by about 35%, and changed molecular autophagy markers. Chenot’s own chief scientific officer was among the authors, and there was no long-term follow-up.
The closest independent study to Portonovi’s six-day Advanced Detox is Espinoza et al. (GeroScience, 2026): a pilot of 30 healthy adults, sponsored by the fasting-food company L-Nutra, which found changes in weight, glucose, ketones, insulin resistance and autophagic flux at the end of a six-day fasting-mimicking diet, though not at every time point.
For three- and four-day programs, we found no published trial of the Chenot Diet at all. That does not mean nothing happens: glucose and ketones respond to calorie restriction within days. But the specific package of changes Chenot cites comes from seven days, and there is no evidence that repeating a three-day cleanse four to six times a year produces lasting benefits. Measuring autophagy in people is difficult in any case; Bensalem et al. (Journal of Physiology, 2025) showed how small and uncertain the signal in blood cells can be even over six months. Our explainer on the Chenot Method and autophagy goes through the studies in full.
| Program | Closest published evidence | Our classification |
|---|---|---|
| Advanced Detox, 6 days | 6- and 7-day fasting-mimicking diet trials in healthy adults | Promising but preliminary |
| De-Stress & Re-Charge, 4 days | No trial of this length or protocol | Insufficient evidence for diet effects; subjective wellness benefit from treatments |
| Cleanse & Rebalance, 3 days | No trial of this length or protocol | Insufficient evidence |
| Fitness Boost, 3 days | Fitness assessment and coaching have value; no trial of the package | Subjective wellness benefit |
The Treatment Menu: Extras and What the Evidence Says
The brochure’s à la carte list shows where costs climb. Selected prices, before the 10% service charge:
| Service | Price | Evidence note |
|---|---|---|
| Medical consultation (30 min) | €145 | Useful if it addresses your actual health questions |
| Whole-body cryotherapy at -110°C | €90, or €240 for 3 | Insufficient evidence: a Cochrane review found too few good trials on post-exercise soreness |
| IV vitamins (30 min) | €180 | Established for a defined indication (a diagnosed deficiency); insufficient evidence in healthy guests |
| IV glutathione (30 min) | €280 | Insufficient evidence: we found no trials in healthy adults |
| Ozone therapy (30 min) | €200 | Insufficient evidence, with safety questions (see below) |
| Hydro-colon treatment (60 min) | €250 | Insufficient evidence, with known risks (NCCIH) |
| Photobiomodulation (20 min) | €90 | Established for a defined indication (oral mucositis in cancer care); insufficient evidence for spa use |
The US National Center for Complementary and Integrative Health says there is limited clinical evidence for colonic irrigation and that side effects can be serious, particularly for people with a history of bowel disease or surgery, or kidney or heart disease. US federal rules describe ozone as “a toxic gas with no known useful medical application” (21 CFR 801.415). Red and near-infrared light has one firmly established use, preventing mouth sores in some cancer patients with carefully dosed protocols (Zadik et al., Supportive Care in Cancer, 2019); a 20-minute spa session is outside that evidence. For cryotherapy, the Costello et al. Cochrane review (2015) found only four small trials and judged the evidence for reduced muscle soreness insufficient.
At Weggis, the massages were intense and the cryotherapy left us buzzing with an endorphin rush. Memorable, but neither has evidence of lasting benefit. The part with actual data behind it, the diet, was the part that left us hungry and irritable.
What a Week at Portonovi Costs in Full
The €4,250 Advanced Detox fee becomes €4,675 with the 10% service charge, before a room. One&Only rates vary sharply by season and are quoted on request, so we have not invented a figure. As a reference, UK specialist operator Healing Holidays priced a seven-night Advanced Detox package, including accommodation, full board and transfers, from £5,399 per person sharing for low-season dates between late October and early January, rising to £7,869 sharing in early September 2025, with peak summer on request. Single occupancy cost considerably more.
L’Albereta’s Advanced Detox fee is €4,990, with the room charged on top. At Weggis, the same program plus the cheapest published room comes to at least CHF 8,370.
The Resort Around the Spa
The surroundings are where Portonovi clearly beats Weggis. The Chenot Espace has an indoor pool, a gym, sauna, steam room and hammam, with daily yoga; the resort adds five outdoor pools around a private beach. The spa team includes a resident Traditional Chinese Medicine practitioner, Dr. Igor Micunovic, for acupuncture. Resort guests can book from the single-treatment menu, which is fully priced in the brochure; the official pages do not say whether non-resident visitors can.
For more hotels where a spa or clinic sits inside a conventional luxury property, see our guide to luxury hotels with longevity clinics.
Who Should Book Portonovi, and Who Should Not
Portonovi makes sense if you want the Chenot experience with a partner who is not on the program, or if a week of restriction feels more bearable beside the sea than in a building full of fellow fasters. The six-day Advanced Detox is the only Portonovi program close to the research. Book a three-day stay as a spa break, not as a metabolic intervention.
Restrictive diets are not suitable for everyone, including people who are pregnant or breastfeeding, have a history of eating disorders, take insulin or other glucose-lowering medication, or have kidney or liver disease. The Chenot questionnaire screens for this, but speak to your own doctor before booking.
Our Verdict on Chenot Espace Portonovi
If I did Chenot again, this is probably where I would do it. The six-day Advanced Detox gives you essentially the Swiss program for a lower fee, in a resort you might actually want to be in. But the shorter programs answer the personal question above in an unflattering way: once you shorten the diet, you keep the massages and the mud, which are the parts with the least evidence behind them. For a wider view, see our European longevity retreats comparison and our analysis of whether longevity retreats are worth it.
Final verdict: 3.7/5. The best setting for the Chenot Method and a fairer program price than Weggis; the short programs carry the brand without the evidence.
Chenot Espace in 2027: Short Programs, Same Questions
In 2027, Chenot sells its method in three distinct shapes across Europe: a dedicated palace at Weggis, where every program runs for at least seven nights, and Chenot Espace spas inside luxury hotels such as One&Only Portonovi and L’Albereta, where stays can be as short as three days. The Portonovi brochure now itemizes every diagnostic and treatment with a price, which makes comparison far easier than it used to be. The research has moved too, with Chenot’s own randomized trial published in Clinical Nutrition in 2025 and an independent six-day fasting-mimicking pilot in GeroScience in 2026. None of that research tests a three- or four-day program.
Chenot Espace Portonovi FAQs
How much does Chenot cost at One&Only Portonovi?
Programs run from €2,220 for the three-day Cleanse & Rebalance to €4,250 for the six-day Advanced Detox, plus a 10% service charge, with accommodation charged separately (checked October 2026).
Is Chenot Portonovi the same as Chenot Palace Weggis?
The Advanced Detox programs are very similar in consultations, diagnostics and treatments. Weggis is a dedicated retreat with a seven-night minimum; Portonovi is a spa inside a beach resort with shorter options.
Can you eat normally on a Chenot program at Portonovi?
The brochure lists the Chenot Diet in every priced program. If you want to eat normally, you would book individual treatments rather than a program.
Does a three-day Chenot detox work?
We found no published trial of a three-day Chenot Diet. The human studies behind the method used six- and seven-day diets and measured only short-term changes.
Can hotel guests book Chenot treatments without a program?
Yes. The brochure prices single services, from a €145 medical consultation to €90 cryotherapy sessions. The official pages do not say whether non-resident visitors can book.
Is L’Albereta a good alternative?
L’Albereta’s Chenot Espace offers a seven-day Advanced Detox at €4,990 with an 850 kcal diet in a country-house hotel in Franciacorta, closer to the Swiss format than Portonovi’s shorter stays.
More on DailyStoke
- Chenot Palace Weggis Review: What a Week on 850 Calories Feels Like
- Longevity Retreats in Europe Compared: Treatments, Prices and the Science
- Luxury Hotels With Longevity Clinics and Biohacking Treatments
- The Chenot Method Explained: Does It Really Trigger Autophagy?
- Longevity Clinic Tests: Which Biomarkers Are Actually Useful?
- Are Luxury Longevity Retreats Worth the Money?
