Sandra Mikhail

Founder & Director of Nutrition A-Z
Co-Founder of HER

Sandra Mikhail is a globally recognised clinical dietitian, author, and founder of Nutrition A-Z and HER. With nearly two decades of experience across Australia, the UAE, and Switzerland, she brings a global perspective to gut and women’s health.
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Holding degrees from Monash University, ETH Zurich, and the International Olympic Committee, Sandra specialises in digestive health, eating disorders, sports nutrition, and corporate wellness. She has worked with brands like FC Zurich, She’s Mercedes, Johnson & Johnson, and Adobe, and is a member of Dietitians Australia.
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A passionate advocate for mental health and science-based care, Sandra has contributed to CNN and Thrive Global by Arianna Huffington, where she speaks on the intersection of stress and nutrition. She is also the author of The Gut Chronicles and co-host of The Gastroenterologist and His Daughter podcast.

Sandra’s mission is to shift the narrative around gut and women’s health – offering personalised, evidence-based care that empowers women to take control of their health journeys.

Languages: English, Arabic, conversational German & French

Nutrition A–Z Family

Qualified nutritionists and dietitians that will work with your reality to nourish your body, mind, movement and sleep.

Viviana Bucci

Certified Nutritionist

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Expertise: Women’s health, hormonal balance, weight management, perimenopause, menopause. Languages: German, English, Italian

Viviana specialises in women’s health with a focus on hormone balance, stress, and fatigue. Her evidence-based approach helps women manage nutrition and lifestyle challenges at every stage. Qualifications: Certified Nutritionist (Apamed Fachschule), Health Coach

Katia Tassiou

Content Creator and Dietitian

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Expertise: Sports nutrition, metabolic health, renal disease, content creation, scientific research Languages: Greek, English, German

Katia is a clinical dietitian with strong expertise in sports nutrition and metabolic health, combining clinical experience with a creative content background. Currently: Clinical Dietitian at Cereno (Neuro-rehabilitation) Qualifications: BSc Nutrition & Dietetics (Greece), MSc Human Movement Sciences (Netherlands)

Our Medical Network

Keeping to our highest standards of care, we have partnered up and work closely with renown doctors, specialists and therapists that cater to your health with an integrative approach in Europe, the UK and the UAE.

Prof. Dr. med. Stephan Vavricka

Specialist Gastroenterologist and Hepatologist Facharzt für Innere Medizin und Gastroenterologie FMH Spez. Hepatologie
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Dr. med. Martin Wilhelmi

Specialist Gastroenterologist and Hepatologist
Facharzt FMH für Gastroenterologie und Hepatologie
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Dr. med. Roger Wanner

Specialist Gastroenterologist and Internist
Facharzt für Gastroenterologie FMH, Facharzt Allgemeine Innere Medizin FMH & DGVS Zertifikat Ernährungsmedizin in der Gastroenterologie

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