FODzyme: Can You Actually Eat Garlic and Onion Again?
A fructan hydrolase enzyme that works before the damage is done.
Garlic and onion are in everything. Restaurant food, stock cubes, most sauces, family dinners you can't get out of. If fructans are one of your triggers, you've probably resigned yourself to either eating them and suffering, or spending a lot of social energy explaining why you can't.
FODzyme is a digestive enzyme supplement that takes a different approach: break the fructans down before they cause trouble. Take a capsule with your meal, and the enzyme — fructan hydrolase — gets to work in your small intestine, cleaving fructan chains before they reach your colon and ferment.
It won't give you a free pass to eat garlic bread every night. But for the situations where avoidance isn't realistic, it's a genuinely useful tool.
How it actually works
Fructans are chains of fructose molecules. Humans don't produce an enzyme that breaks them down, so they pass through the small intestine intact and land in the large intestine, where bacteria ferment them. That fermentation produces gas, triggers cramping, and causes bloating.
FODzyme's fructan hydrolase (an endo-inulinase) cuts these chains internally — not from the ends — which means it breaks long chains into small fragments quickly. You've got roughly 2–4 hours in the small intestine before contents move to the colon. The endo approach works within that window.
Take it at the start of the meal, not before or after. The enzyme needs to be in the gut at the same time as the food.
What the research says
A 2022 double-blind crossover trial gave participants either FODzyme or placebo with a high-fructan meal. The FODzyme group reported significantly lower bloating, abdominal pain, and flatulence. The effect was meaningful — not marginal.
That said, it's one trial. It's not a cure. And it only works on fructans specifically — not lactose, not polyols, not GOS. If your triggers are mixed, it helps with one piece of the puzzle.
Worth knowing
- —Works on fructans only — onion, garlic, wheat, rye, leek, asparagus are the main ones
- —Fructan hydrolase denatures at high temperatures — don't take it with scalding hot food or drinks
- —Not a substitute for the elimination phase — use it once you know fructans are a trigger
- —It's not cheap. Factor it in as a supplement for social/unavoidable situations rather than daily use
If onion and garlic are your main triggers and you've confirmed this through the reintroduction phase, FODzyme is probably the most targeted thing you can take. It won't work for everyone, but when it does, it's a meaningful quality-of-life improvement.