My Background

This website is an avenue for communicating with my patients. I keep very up to date with health issues, especially to do with aging and hormonal problems. I will share the interesting bits with you. I have a daily blog dealing with health issues. You can subscribe to this free service by entering your email address in the space provided.

I am a GP working in Caboolture, Queensland. I have a special interest in natural hormone treatments, also known as body identical, and sometimes as Bio-identical hormones. The name derives from the fact these  hormones are identical to the hormones we produce naturally. I am not an endocrinologist, or a Gynecologist, and have never claimed to be one.

I have been using these hormones for the last 25 years, and have treated nearly 5000 people with them.


I have a MB Bch,(Bachelor of Surgery and Medicine).  I also have a Diploma in Obstetrics, obtained from the Royal College of Obstetricians and Gynecologists. As well I have a Diploma in Tropical Medicine and Hygiene, obtained at the Witwatersrand University, South Africa. I am a Fellow of the Royal Australian College of GP’s.  Over my lifetime I have delivered over 1500 babies, an achievement I value highly. Some of those I delivered are now my patients.

Books written:

Having studied diet, lifestyle, health and positive attitudes, I was frequently asked as to why I did not share this knowledge with others more widely. So with the encouragement of my wife, I would get up at 4 am to research and write “Live Well Over 100.”  The first edition of 5000 sold out very quickly, so more study and earlier am starts led to the second edition, which was a lot bigger and more in-depth. The print run of 20,000 sold out fairly quickly as well. I was invited to speak at various health related conferences, something I really enjoyed, as I got to meet people from various parts of the world. I spoke in conferences in New Zealand,  Singapore, Philippines, South Africa and Australia of course. Unfortunately, the book is now out of print, and is no longer current as it was written over 15 years ago.

Live Well Over 100

While touring New Zealand and giving talks at various venues, I met Michail Borrisenko, who had a great interest in Colostrum, and the many health benefits thereof.  Michail and I coauthored  “Microbe Apocalypse- Man Vs Microbe'”.  Michail Borrisenko, is chief scientist, Institute of Colostrum Research,  New Zealand.

Microbe Apocalypse

I wrote “The Medical Vitadiet”, which has sold over 25,000 copies to date. This deals with the benefits of the low-calorie diet to produce weight loss. At one stage I had 5 weight loss clinics in Queensland, with very successful results. Having decided to move on to other aspects of health, I sold the business, but allowed the new owners to continue to use the book I wrote as part of the program.

Women’s Hormones.

Some of the motivation for this web site is to present the medical evidence and research to reassure men and women about the science behind what I do and to refute some of the misleading information   about Natural (Body identical,Bio-identical) HRT.

  1. Finally able to see Dr Holloway after he reopened his books recently, you are a consummate professional, your knowledge is precisely and simply explained to the layperson and your open minded blogs express exactly what women like myself have been searching for thru the last two and half years, in a Medical Dr. To become so apprehensive about seeing a Medical Heath professional today is scarier then the illness or disease itself now, wondering if you will be believed about yr symptoms, (not be called crazy or have anxiety or be told yr simply old) or whether you will be judged and ostracised for your own body autonomy and choices of the health care management you want for yourself and your family. The upside to this pandemic has been the revelation that there are choices that are actually available as to how we chose to interact with the medical profession, how we can choose how to be treated with a variety of western medicine, Chinese or Aryvudic medicine or natural medicine and therapies.
    This pandemic has educated many like the women who see Dr Holloway in ways that we never thought possible but people are waking up and the future of health care is not only in the hands of the Medical Industry (and that’s what it is now an industry) but it’s also in the power of the people and the fact is that we have now had to become as educated as the qualified trained health professionals who treat us, doing PCR Tests, self administration of Pap smears, specimen taking of bowel samples, understanding signs and symptoms of illnesses we never had to understand ourselves when we left it to the medical Professionals. It’s a whole new world post pandemic and many people will find them in the predicament of having “google” their symptoms when Health professionals refuse to see them.

    I love Dr Holloway’s blogs and his insight into what’s happening for all of us right now no matter our choices, but there is certainly an air of mistrust of the medical profession and as someone who’s previously been a nurse, who’s eldest daughter is an RN, who’s 2nd daughter is a qualified paramedic, and 3rd daughter who is in Veterinary Studies, we are a family of nuturers, but times have most definitely changed and sadly not for the betterment of humanity.

    Thankyou Dr Holloway for listening to me, without judgement, and validating my sense of individual self and not allowing me to feel doubtful about my choices of healing my body the way I choose.

  2. Alana Arrowsmith

    Interested in some information
    33 had a hysterectomy 5 years ago leaving only ovaries
    Feeling like shit constantly and have been having bad hot sweats through the night even with the air con on waking up in a lather

  3. I have been on this journey for 13 years and at 71 I am so grateful that I found dr Holloway as my vitality for life is fantastic thank you.

  4. Dr Holloway I rang for a week continually in May to see if I could get a telephone appointment, but no one would pick up..I emailed you telling you I was going away travelling for 4 months and could you write me a script for metformin and fax to Dallas Pde… I have just returned from travelling and rang asking if I could please have a script for metformin and was told you would be giving me a script for everything !! I told Rebecca 3 times I only want Metformin as I would be coming to see you for the troches …Alas I still have no script for metformin, you wrote one for Troches…I rang again and Rebecca is insisting I have to come and see you as the metformin is over 1yr since you wrote the script…
    Do you need to see me for a Metformin script…

    Barbara Kiri

  5. Hi Dr Holloway, I was desperate for an appointment with you and have been told you don’t take new patients. I was hoping you could point me in the right direction to a doctor that will discuss NDT as an alternative for Hashimotos/Hypothyroidism. I found your blog extremely interesting and felt you would have been the perfect doctor for me at this stage in my disease. Thank you.

  6. Thank you for being a doctor and advocating for hormone therapy! It is so difficult to explain how life limiting menopause is. And the fact that you understand the benefits of troches is huge. Yes some women have it easy, I am not one of them. I can’t get out of bed, I have disassociation disorder, I cry, and I’m suicidal when not on my hormones. I would not be here or possibly even alive now if I hadn’t lucked into finding a similar doctor like you. (Very VERY hard to find) I’m not being dramatic I just am sharing my reality so others can understand and not dismiss the women around them going through this as this being “normal”, Or worse by offering therapy or vitamins or soy something or other or whatever other garbage folks want to hawk. I have ZERO hormones unless I’m on my meds. Not a little, not some, I have unregistered levels. There are other women like me in the world, there is medicine that can really truly help them. So… Thank you for saving lives…

  7. Hi, Dr Colin Holloway,
    Would you be so kind as to direct me to your Blog on Rabeprazole. After our phone consultation, 30/5/22, it was mentioned and warned re long term use. I am researching of course, but would like to read your blog on the matter, and don’t seem to be able to search on this area.
    Thanking you in advance
    Traute Meyer

  8. Diane McCarthy

    Good afternoon Colin, I was recommended by a friend in Coffs Harbour to see you. As your appointment books are closed, could you recommend somebody who can me utilising your approach to help menopausal symptoms. I had minimal menopausal symptoms when I was going through changes which had ceased…but then after vaccines the side affects are now what most women I’ve heard talk about. I’ve had constant headaches for about 5 months, can’t sleep ( awake most nights from midnight) moods swings are crazy and the hot flushes are insane( they include a rush of agitation) AND not to mention the body fat around my mid section which I’ve never had before. Yep I’m a perfect candidate…. Please help:) thank you for your time . Warmest regards Di

  9. Sharon Douglas

    Goooood morning Colin!

    HELP I am hoping I could please come in and see you TODAY if possible. I am taking my 3rd lot of troches and I feel sick, my glands are up and I have sore ears, feel emotional and nervous (this started on the 3rd day) The first lot I was tired with very tender breasts 1.5m testosterone. My 2nd lot where I felt the best 2.5mg testosterone, I was angrier than normal, My 3rd lot – I believe if I continue to take the 2nd script and reduce the testosterone to 2mg would work? Can you please call me 0452 076 885. Very grateful Sharon Douglas

  10. Charmaine Wightman

    As a patient of yours for over 20years, I am always keen to read all articles re hormones and find very interesting all facts you provide.

  11. Hi. God you tell me how to find the info you mentioned today about the book oestrogen matters and Oprah

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