Alex Mercer

Alex Mercer has lived with IBS since childhood and isn't a nutritionist or a doctor. After years of being told he was anxious or would grow out of it, he spent more than 12 years reading the research properly, and now shares what he has learned with the family, friends and support-group members who come to him with the same questions. He translates peer-reviewed research into practical, honest advice, and is always upfront about what the evidence does and does not show.

The Low-FODMAP Approach to Loose Stools: A Nutritionist’s Practical Starting Guide

Alex Mercer · March 25, 2026

The Low-FODMAP Approach to Loose Stools: A Nutritionist's Practical Starting Guide — image 1

If you have been struggling with unpredictable, urgent, or chronic loose stools, you are not alone — and you are not without options. One of the most effective tools I reach for in practice when a client presents with IBS-related…

Best Probiotics for Diarrhoea: What I Recommend After Antibiotics, Travel, or an IBS Flare

Alex Mercer · March 24, 2026

Best Probiotics for Diarrhoea: What I Recommend After Antibiotics, Travel, or an IBS Flare — image 1

One of the most common questions I receive from clients is a simple one: which are the best probiotics for diarrhoea? And my honest answer is always the same — it depends. Not every bout of loose stools has the…

Chronic Diarrhoea: The 6 Most Common Nutritional Triggers to Look For

Alex Mercer · March 23, 2026

Chronic Diarrhoea: The 6 Most Common Nutritional Triggers I Identify in Clinical Practice — image 1

When a client presents with chronic loose stools, my first instinct is not to reach for supplements — it is to identify the trigger. In my years of clinical practice, the same six chronic diarrhoea nutritional triggers come up again…

Gluten-Free Baking That Actually Works: The Flour Blends I Recommend After Years of Testing

Alex Mercer · March 22, 2026

Gluten-Free Baking That Actually Works: The Flour Blends I Recommend After Years of Testing — image 1

Gluten-free baking has a reputation for producing dry, crumbly results — and honestly, for a long time, that reputation was well earned. I have spent years testing flour blends in my own kitchen and working through options with coeliac clients…

Best At-Home Coeliac and Gluten Sensitivity Tests: What They Actually Measure and Who Should Use Them

Alex Mercer · March 21, 2026

Best At-Home Coeliac and Gluten Sensitivity Tests: What They Actually Measure and Who Should Use Them — image 1

I am often asked whether at-home coeliac tests are worth it. My answer depends entirely on what the client is testing for. Over the years, working with dozens of clients who suspect gluten is at the root of their symptoms,…

Nutritional Deficiencies After a Coeliac Diagnosis: Why a Gluten-Free Diet Alone Is Not Enough

Alex Mercer · March 19, 2026

Nutritional Deficiencies After a Coeliac Diagnosis: Why a Gluten-Free Diet Alone Is Not Enough — image 1

One of the most common misconceptions I encounter in my practice is the belief that a coeliac diagnosis, followed by a strict gluten-free diet, is the end of the story. In reality, for many of my clients, it is only…

Hidden Gluten: The Unexpected Sources I Find in Almost Every New Coeliac Client’s Diet

Alex Mercer · March 18, 2026

Hidden Gluten: The Unexpected Sources I Find in Almost Every New Coeliac Client's Diet — image 1

In my practice, I work with many newly diagnosed coeliac clients who arrive convinced they have already mastered the gluten-free diet. They have cleared out their bread bin, switched to gluten-free pasta, and stopped eating at their favourite pizza restaurant….