Product check · Quest Nutrition
Is Quest Nutrition Quest Protein Bar low FODMAP?
FODMAP score
68
Moderate
Not reliably — Quest bars land in the moderate zone. Each bar stacks a double-digit dose of soluble corn fiber (a fermentable prebiotic fiber, roughly 12-14g listed as fiber) on top of several grams of erythritol, and that combined fermentable load adds up for many sensitive guts. The milk protein isolate and whey protein isolate base itself is clean and essentially lactose-free — it's the fiber-and-polyol system that drives the caution.
What's inside
📏 One 2.12 oz (60g) bar carries the full corn-fiber plus erythritol load — half a bar is a much smarter first test than a whole one.
Gentler alternatives
↳Natural peanut butter on rice cakes — Similar snack satisfaction with essentially no fermentable fiber or polyols.
↳Premier Protein or Core Power shake — Delivers the same 20-30g protein hit with none of the added fiber or sugar alcohols.
↳GoMacro protein bar — Sweetened with brown rice syrup (glucose-based) instead of erythritol or added prebiotic fiber — gentler for many, though still check the flavor's label.
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Scan any product — freeBased on the publicly listed ingredients at time of review; recipes change — check the label. Informational only, not medical advice. FODMAP tolerance is individual.
Serving it alongside other foods? Check your whole plate for stacking →