One food at a time

In 1926 an Oakland physician named Albert Rowe published the first elimination diets, and gave the idea its name. His patients came in with hives, headaches, a stomach that was never right, and no test could tell him why. So he stopped testing and started subtracting. Take the suspect foods off the plate for a few weeks. If the trouble leaves, bring them back one at a time and see which one brings it with it. The body, he figured, would answer a question the laboratory couldn't, as long as you asked it one food at a time.

Nearly eighty years later a team at Monash University in Melbourne, led by the gastroenterologist Peter Gibson with the dietitian Sue Shepherd, put Rowe's method on a firmer footing for one condition in particular. In 2005 they named a family of short-chain carbohydrates that the small intestine absorbs poorly: certain sugars in wheat, onions, garlic, beans, milk, apples, honey and the sweeteners that end in -ol. In most people these pass through unnoticed. In a gut that's already irritable, the bacteria ferment them, the bowel fills with gas and water, and the day is lost to bloating and pain. They called the family FODMAPs, and they built a three-part plan: strip them out for two to six weeks, return them one group at a time over the next month or two, then keep only the limits you actually need. In the trials since, roughly half to three-quarters of people with irritable bowel syndrome have found real relief, and the gastroenterology guidelines in Britain and elsewhere now list the diet as a standard option, with a dietitian in the room.

Here is the part the enthusiasts skip. The first phase is not a way to eat. It narrows the plate hard, and it starves some of the good bacteria along with the gas. Monash's own instruction is that the strict weeks end on schedule and the reintroduction is the point. The goal is the shortest list of foods you truly have to avoid, not the longest list you can.

It's a Healing key because this month is for naming the hidden thing, and a food that's been quietly hurting you for years is as hidden as anything gets. I spent a decade in restaurants in every role, and the table that asks for no onion and no garlic is not being difficult. Somebody there has done this work. If there's blood, fever, weight you didn't mean to lose, or a gut that wakes you at night, the door is a gastroenterologist first and a registered dietitian beside them; Vault Human coaches and doesn't treat.