Longevity clinics for the ultrawealthy can cost $50,000 a week. Here are the world's top 6 destinations.

To that end, Hooke has developed what it says is "the world's most advanced health screening" to create continually evolving and personalized longevity plans for its clients.

It offers around 20 assessments ranging from a four-part MRI to bone density tests to whole genomic sequencing and cognitive assessments.

"Using long-term data from individual medical, fitness, nutritional and cognitive assessments, our programmes build a comprehensive and holistic 'big picture' view of wellness risks and weaknesses — providing the basis for evolving lifestyle and medical recommendations," Kate Woolhouse, Hooke's CEO, wrote to Business Insider by email.

And Hooke offers three tiers of membership to clients. Its popular Healthspan Membership is close to $40,000 a year. It comes with Hooke's extensive roster of diagnostic tests, bespoke nutrition plans, access to a scientific advisory board, proprietary supplements, and an Oura ring — just a glimpse at what is included with membership.

Hooke's clients range in age from 23 to 70, with an average age of 50, but over the past year, the center has seen an increase in clientele in their 30s, Woolhouse said.

Clinique La Prairie has been around for more than 90 years, during which time it's built up a reputation among the wealthy as a destination for personalized treatments that can slow the aging process.

Its premium revitalization package — a seven-day, six-night experience recommended for those ages 35 and up — includes longevity consultations, sleep quality assessments, DNA tests, personalized nutrition guidance, and personal training sessions, according to the program brochure.

And that's just a smattering of the full program, which also comes with luxury accommodations, limousine service, access to the clinic's steam room, pool, sauna, and zero-gravity floating bed — where patrons can "dry float" and listen to sounds for stress relief, according to its brochure.

The program "stimulates cell regeneration, fights the signs and causes of aging, and reinforces the immune system through a four-pillared approach of medicine, nutrition, well-being and movement," a spokesperson for Clinique La Prairie told Business Insider by email.

Prices for this one luxurious week (in a room with a balcony and view of Lake Geneva) start at $53,000.

The seven-day program — about $4,700 per person, excluding accommodations and meals — includes advanced diagnostic tests, comprehensive wellness screenings, spa treatments, yoga classes, energy medicine sessions, and biohacking therapies, according to its website.

Some of the most popular treatments include intravenous infusions like "Ozone Therapy," which is said to increase oxygen levels in the body and help enhance cellular function, Dr. Tamsin Lewis, RoseBar's medical advisor, told Business Insider.

"The direct delivery of certain nutrients via the bloodstream serves to have an instant impact on vitality whilst forming part of a broader approach to living well for longer," Lewis said. One of the immediate benefits from Ozone Therapy is a visible change in blood color due to increased oxygen levels, and in the long-term, the treatment can help support immune function, Lewis said.

Lewis said she has seen an uptick in clients seeking longevity treatments in recent years in the "pursuit of wellness as a new luxury."

The Well's longevity-focused offerings include customized IV drips, infrared sauna sessions, cold plunges, and health coaching sessions.

The centers have drawn entrepreneurs, including Spanx founder Sara Blakely, ClassPass founder Payal Kadakia, and actresses like Reese Witherspoon and Gwyneth Paltrow.

The Well's location at Hacienda AltaGracia, Auberge Resorts Collection, in Costa Rica, is next to one of the world's five Blue Zones, regions where people live some of the longest and happiest lives.

The resort's four-day retreat program — around $3,000 per person — includes a series of longevity-boosting practices, including various types of bodywork and well-being consultations, according to a spokesperson for The Well.

Guests at Hacienda AltaGracia can also book immersive experiences in the nearby Blue Zone on the Nicoya Peninsula.

The growing interest in these types of exclusive longevity treatments has dovetailed with a spike in wellness tourism, a trend that's picked up among wealthy travelers in the past few years, as some of them forgo all-night clubs and beach parties in favor of spirituality retreats and resorts that prioritize personal care.

Wellness tourism is expected to grow almost 17% annually and reach $1.4 trillion by 2027, according to projections from the Global Wellness Institute.

"While travel overall has started leveling out since the post-COVID boom, all the trends point to continued growth for demand in wellness travel," Megan Mulholland, The Well's vice president of Brand & Marketing, told BI.

The central focus of Lanserhof — launched in 1984 — is "the thorough regeneration of the intestines to revitalize the vital forces," according to its website. It relies on detoxification, purification, and deacidification programs that draw upon holistic medicine, psychology, and modern medicine to achieve this revitalization.

"The first days here are not easy with the diet — guests can sleep all day or have headaches," Dr. Katharina Sandtner, Lanserhof's medical director, told Forbes. "A few days later, energy comes back and this good energy stays with you for a very long time. It's incredible."

But the "good energy" comes at a cost. The one-week "Cure Classic" program, the center's most basic offering, starts at a little above $3,000 a person, excluding accommodations. The program includes numerous medical examinations, a body composition test, urine analysis, therapeutic massages, detox treatments, hydrotherapy treatments, medical lectures, group exercise, and relaxation therapies, according to the Lanserhof Lans program brochure.

The center's offerings are as extensive as a two-week long-COVID package that's aimed at guests who are struggling with the effects of COVID. The more than $5,200 package includes seven different medical examinations, respiratory therapies, foot reflexology, altitude training sessions, and group relaxation and exercise sessions to achieve "physical, mental and spiritual regeneration right down to the core," according to the brochure.

"Minus the hunger headaches, the experience is healing in every sense of the word," one patient wrote of the Long-COVID treatment program in Allure. Lanserhof Lans didn't respond to a request for comment from BI.

Four Seasons Resort Maui guests can experience an elaborate multi-day longevity package, the Longevity Protocol, for $44,000. Since it launched last year, it has drawn at least half a dozen people, according to The Wall Street Journal.

The program — developed in partnership with longevity company NEXT|HEALTH — consists of four hour-long sessions designed to boost overall vitality by improving cellular communication and blood oxygenation and recharging the cell's powerhouses. Guests are recommended to spread the sessions out over three to four days.

"We're seeing increased interest from our patients in enhancing their longevity while on vacation and focusing more on their long-term health," Dr. Darshan Shah, NEXT|HEALTH's CEO, founder, medical director, and designer of the Longevity Protocol, told BI.

"Longevity treatments work better when you are in a relaxed state of mind, with minimal inflammation internally," he said.