Understanding supplements.
How do I evaluate what I'm actually buying — in the gut-health aisle's most crowded market?
The IBS aisle is the gut-health industry's flagship store — and its most evidence-loose. Probiotic products borrow strain-unrelated science, 'gut repair' blends stack low-dose ingredients under proprietary formulas, and enzyme cocktails sell universal solutions to a condition whose triggers are individual. Evaluation here means three checks: strain identity for probiotics, coating for peppermint, and type for fiber.
Enteric Capsules
Peppermint — the coating IS the product
Powders
Psyllium — mix well, drink fully
Capsules
Probiotics — CFU + strain ID
Gummies
The dose-ceiling trap — see below
Enteric-Coated Capsules
The trials' formulation: the coating survives the stomach and dissolves in the intestine, delivering menthol directly to the colonic smooth muscle where the antispasmodic effect belongs. Typically 0.2–0.6 mL oil, dosed 2–3 times daily before meals.
Uncoated / Tea / Drops
No coating, no destination: the oil releases in the stomach, relaxes the esophageal valve, and produces heartburn — turning an IBS remedy into a reflux trigger. Peppermint tea is pleasant and mild, but it is not the tested intervention.
Choosing the Right Form & Dose
Label literacy in the IBS aisle has three specific jobs:
- Peppermint: enteric-coated, 0.2–0.6 mL per capsule, dosed before meals; stop if heartburn appears — and see the acid-reflux page for why.
- Psyllium: soluble, powder preferred for dose control, half-servings to start, water always; introduce before any elimination diet.
- Probiotics: one evidenced strain at a time, 4–8 week trial, then the honest stop-or-continue decision.
- The standing rule: nothing on this shelf substitutes for the red-flag evaluation or the dietitian-delivered protocol.
Red Flags to Watch For
The gut-health market is the site's most claim-dense aisle:
- Multi-strain 'IBS blends' stacking 10+ organisms — no multi-strain IBS product has category-level evidence; the trials are single-strain, and blends dilute doses below any studied level.
- 'Gut repair' proprietary complexes — L-glutamine, aloe, licorice, enzymes at sub-therapeutic doses under a secret formula: uncheckable, unverifiable, disqualifying.
- Massive-CFU marketing ('50 billion!') — dose without strain identity is noise; the evidenced IBS strains worked at 1–10 billion.
- Digestive-enzyme 'universal' claims — enzymes are specific (lactase for lactose, etc.); a broad-spectrum enzyme cocktail implies a universality the pancreas would find surprising.