About Us

Jason Hawrelak
Dr Jason Hawrelak                  ND (SCU), BNat(Hons), PhD

ProbioticAdvisor.com is the vision of Dr Jason Hawrelak – who brings his unique combination of skills to the project – probiotic researcher, educator, and clinician.

Dr Hawrelak is Head of Research at ProbioticAdvisor.com. His passion for gastrointestinal health, the GIT microbiota, and probiotics was ignited during the final year of his undergraduate training. Subsequently, Dr Hawrelak did his Honours (First Class) and PhD degrees in the areas of the gastrointestinal microbiota, irritable bowel syndrome, and the clinical applications of pre- and probiotics. He has written extensively in Australian and international textbooks and journals on these topics – including Pizzorno and Murray’s Textbook of Natural Medicine (3rd and 4th editions), Clinical Naturopathy: An Evidence-based Guide (1st and 2nd editions) and Herbs and Natural Supplements: an Evidence-based Guide (4th edition). A list of some of Jason’s’ other publications is below, with links to some of the articles.

Dr Hawrelak has taught health professionals at both the undergraduate and postgraduate level for the past 15 years. He currently coordinates and teaches the Evidence-based Complementary Medicine Program in the School of Medicine at the University of Tasmania (Hobart, Australia) and is the Gastrointestinal Imbalances lecturer in the Master of Science in Human Nutrition and Functional Medicine program at the University of Western States (Portland, Oregon).

He regularly presents to other health professionals at National and International conferences and has been a popular speaker for the Health Masters Live series – where he has presented his Gastrointestinal Masterclass series and lectures on Managing Paediatric Gastrointestinal Conditions and Building a Healthy Gut and Vaginal Dysbiosis.

His lectures and publications have changed the way thousands of practitioners in Australia, Canada, and the US manage gastrointestinal conditions – specifically their use of prebiotics and probiotics.

Dr Hawrelak is a clinician with more than 15 years’ experience working in busy natural medicine apothecaries and clinics. The main focus of his practice is in the treatment of gastrointestinal conditions, both acute and chronic – such as irritable bowel syndrome, ulcerative colitis, Crohn’s disease, gluten-related disorders, peptic ulcer disease, intestinal parasites, and fructose intolerance.


Some of Dr Hawrelak’s Publications
• Sandberg-Lewis S, Hawrelak JA. Gastroenterology. In: The Healing Power of Nature: The Foundations of Naturopathic Medicine and Ecology of Healing: Primary Care for the Twenty First Century. Elsevier (Textbook in progress)
• Dwyer A, Whitten DL, Hawrelak JA. Herbal medicines, other than St John’s wort, in the treatment of mild-to-moderate depression: A systematic review. Alternative Medicine Review. 2011;16:40-49.
• Hawrelak JA, Myers SP. The effects of two naturopathic formulations on irritable bowel syndrome symptoms: a pilot study. Journal of Alternative and Complementary Medicine. 2010;10:1065-1071.
• Hawrelak JA, Cattley T, Myers SP. Essential oils in the treatment of intestinal dysbiosis: a preliminary in vitro study. Alternative Medicine Review. 2009;14:380-384.
• Jenkins C, Evans S, Hawrelak JA, Wohlmuth H. Herbal medicines prepared by traditional and contemporary methods – a comparative study. Planta Medica. 2009;75:992.
• Hawrelak JA. Probiotics, prebiotics and synbiotics. Journal of Complementary Medicine. 2007;6:28-35.  http://search.informit.com.au/browsePublication;py=2007;vol=6;res=IELHEA;issn=1446-8263;iss=6
• Whitten DL, Myers SP, Hawrelak JA, Wohlmuth H. The effect of St John’s wort extracts on CYP3A: a systematic review of prospective clinical trials. British Journal of Clinical Pharmacology 2006;62:512-526.
• Hawrelak JA, Whitten DL, Myers SP. Is Lactobacillus rhamnosus GG effective in preventing the onset of antibiotic-associated diarrhoea: a systematic review. Digestion. 2005; 72:51-56.
• Hawrelak JA. Probiotics and functional foods for gastrointestinal disorders. Journal of Complementary Medicine. 2005;4:42-50.
• Hawrelak JA, Myers SP. Do medicinal herbs negatively impact the human gastrointestinal tract microflora: a preliminary in vitro study. Conference Proceedings from the 5th International Conference on Phytotherapeutics 2004.
• Hawrelak JA, Myers SP. Herbal Medicine in Cardiovascular Disease. In: Cohen M (ed). Holistic Solutions for Sustainable Healthcare. Melbourne, Australian Integrative Medical Association 2004: 211-242.
• Hawrelak JA, Myers SP. The causes of intestinal dysbiosis: A review of the literature. Alternative Medicine Review. 2004; 9(2):180-197.
• Hawrelak JA. Probiotics: Choosing the right one for your needs. Journal of the Australian Traditional-Medicine Society. 2003;9(2):67-76.
• Hawrelak JA. Giardia: Pathophysiology and Management. Alternative Medicine Review. 2003;8(2):129-142.
• Hawrelak JA. Medicinal plant monograph: Guava (Psidium guajava). Journal of the Australian Traditional-Medicine Society. 2003;9(1):25-30.
• Hawrelak JA. Prebiotics: What are they and how safe? Journal of the Australian Traditional-Medicine Society. 2002;8(4):151-156.
• Hawrelak JA. Probiotics: Are supplements really better than yoghurt? Journal of the Australian Traditional-Medicine Society. 2002;8(1):11-23.
• Myers S, Hawrelak JA. Intestinal dysbiosis, gastritis and irritable bowel syndrome. In: Ngu MJ (ed). Proceedings of the Integrative Medicine Conference and Exhibition. Melbourne, Australian Integrative Medical Association. 2001:53-56.
• Myers S, Hawrelak JA. Evidence-based complementary medicine in gastroenterology. Proceedings of the National Conference of the Gastroenterological Nurses Society of Australia. 2000:14.