Search Medical Centers

Demarest Clinic


Phuket, Thailand

Demarest Clinic - Overview

Patient Testimonials

Joseph Smith – Patient Review for Rotator Cuff Tendon

Pierre Hollenback – Patient Review for Sport Injuries

Guy Oliver’s Road to Recovery After A Snapped Achilles Tendon

Demarest officially opened its doors for the first time on April 2nd, 2022.


“Regenerative Medicine is increasingly replacing traditional medicine,” said CEO and Founder William Demarest Johnson. “Regenerative Medicine treats chronic illness at its cause rather than treating the symptoms”. “Phuket has an amazing, sophisticated population who are more receptive to new ideas,” said William Demarest Johnson.


Why should you choose Demarest…


Demarest was founded on the principle that regenerative medicine will improve the quality of people’s lives. We base our success on positive outcomes, not profit. We constantly seek through our global network of Research Scientists (Board)to evolve our protocols as soon as a new effective treatment becomes available.


We are an information aggregator, whose sole purpose is positive outcomes in order to gain trust and build a brand in this nascent, yet inevitable paradigm shift as Cellular Medicine replaces Traditional Medicine. People will learn to prevent disease and reverse ageing rather than treating the symptoms of disease.


We put our name on this company because we recognize that managing your health assets is just as important as managing your financial assets. Health and youth are wealth. Trust Demarest to bring you the newest, most effective treatments available anywhere in the world.


Our money back guarantee on our stem cell treatments removes the question as to whether these protocols will work for you. We use the most powerful cells available. They are also the most expensive, yet our prices are competitive.


Demarest combines the best practices in Regenerative Medicine through a community of researchers and experts to identify the most cost-effective method of utilizing these procedures as well as assuring their efficacy, in order to create a world where aging, and aging-related diseases, are optional.

The exponential rate of change in the evolution of regenerative medicine assures longer life expectancies, while advances in science and technology support new procedures that can keep us looking younger and more beautiful than even the most genetically gifted. We promise to introduce through our dedicated doctors and lifestyle coaches a whole spectrum of services.

From cutting edge cellular procedures that can literally turn back the clock on age related illness and injuries, to world class yet inexpensive cosmetic surgery to assure you can look ten years younger returning from your exotic vacation.We also offer a complete array of non-surgical rejuvenation procedures to ensure you look and feel your best.


Living Life to The Full…


“Giving back time to people”


                              William Demarest Johnson

According to its founder, the new Demarest Clinic in Phuket specializes in regenerative medicine and offers special week-long anti-aging packages at an exclusive island resort and even on a super yacht.


Resort guests enjoy full access to the island’s three private beaches, four swimming pools, 43-seat cinema, gym, karaoke and games room, as well as water sports and toys like jet-skis, paddle boards, kayaks, wake boards and Hobie Cats.


The mahogany-finished interior includes a large saloon and indoor dining area on the main deck, as well as five lower-deck guest cabins including a full-master suite with office. Toys include a jet-ski, Sea bob, paddle boards and diving equipment, so guests can do as much or as little as they want.




   Cellular Therapy

(Amniotic Fluid Stem Cells)


We utilize autologous stem cells to treat different age related or degenerating diseases.


With extensive research and approval from our international medical advisory board, we combine the latest technologies in regenerative medicine and cellular therapy for both age-related diseases and target specific conditions.


Stem cells are our body's special cells which are capable of developing into cells that serve numerous functions in different parts of the body. They can act as an internal repair system, regenerate and replace damaged tissues and organs in the body.

  Core Infusion


Intravenous Laser Blood Irradiation (ILBI)


Intravenous Laser Blood Irradiation (ILBI) is a medical procedure which exposes a low-level laser directly to the blood stream. This treatment can directly transfer energy to red blood cells and helps to activate cell repair throughout the body.



Jet Lag Recovery:


Comprised of vitamins,minerals, antioxidants, and anti-inflammatory, the Jet Lag IV replenishes amino acids that contribute to your brain’s neurotransmitters, which significantly reduces depression, anxiety, and fatigue that comes with traveling.




L-Carnitine is important in energy production because it transports essential fats from cell membranes into the mitochondria, and at the same time also performs as an anti-oxidant, by neutralizing free radicals and reducing inflammatory and oxidative damage to cells.




Our most comprehensive Vitamin Injection IV includes Vitamin B12, Vitamin B6, B- 100 Complex, Ascorbic Acid / Vitamin C, Magnesium sulphate, and Fluimucil (NAC). It helps restore valuable nutrients in your body.


Myers’ Cocktail


A combination of vitamins B, C, magnesium, nutrients and minerals can quickly boost and rejuvenate your body. It is used for treating many conditions, for example chronic fatigue, asthma, and depression.


Intravenous Oxygen Therapy


Intravenous Oxygen Therapy is a safe and painless procedure in which oxygen is directly injected into the blood stream. By increasing the availability of oxygen in the body,this infusion helps to enhance blood circulation, metabolism, and normalize blood pH levels.


Skin Brightening


Made of pure L-Glutathione, the Skin Brightening infusion has a remarkable antioxidant property and is important in the regeneration of certain antioxidants, such as vitamins C and E, which are also required by the body.


Vitamin C


Vitamin C is an antioxidant that helps protect your cells against the effects of free radicals— molecules produced when your body breaks down food or is exposed to tobacco smoke and radiation from the sun, X-rays or other sources.


Energy Booster


This cocktail of nutrients includes B Vitamins, which play a significant role in the body’s energy production and magnesium, which aids in combating fatigue and anxiety.N-acetyl cysteine also replenishes one of the most powerful antioxidants in the body, glutathione


Full Body Detox


A powerful combination of vitamins and Alpha Lipoic Acid will detoxify the body by carrying heavy metals and toxic chemicals out of the cells. This helps to enhance vitamin C, glutathione, and vitamin E production and increase levels of coenzyme Q10 in cells.


Ozone Therapy


Ozone therapy is used to treat conditions by improving the body’s ability to take in oxygen through a process called autohemotherapy, where a small amount of your blood is drawn out before being mixed with the ozone. It also activates the immune system to help the body combat particular conditions.




Chelation removes built up toxic heavy metals from the body, which causes inflammation and damage to brain and vital organs. It helps to rejuvenate blood vessels, increase blood circulation, support cardiovascular health, and lower risks of neurological conditions.