Understanding supplements.
How do I evaluate what you're actually buying — in the gut-health aisle, the industry's fastest-growing and loosest territory?
The gut-health aisle is the supplement industry's frontier boomtown — probiotics on everything, 'microbiome-friendly' labels on foods that never met a bacterium, and 'leaky gut' cures borrowing a real mechanism to sell untested protocols. The honest shelf is narrow: a strain-named probiotic with real trials, the fiber standard, and the absorption vitamin. This chapter teaches the three label skills that filter the aisle: strain identity, CFU honesty, and the 'leaky gut cure' disqualification.
Refrigerated Probiotics
Cold-chain — the counts stay real
Powders
Psyllium — the honest dose format
B12 Lozenges
Sublingual — dose over form
'Leaky Gut Cures'
The category this chapter retires
Strain Names, CFU at Expiry, and the Trial
Three questions decide every probiotic purchase: (1) Does the label name full strains — genus, species, AND strain designation (e.g., the De Simone combination's eight named organisms), or does it say 'proprietary blend'? (2) Is the CFU count guaranteed at EXPIRY, not 'at manufacture' — the difference between 112 billion arriving and 112 billion promised? (3) Does THAT strain set — not the category — have trials in YOUR condition? A product failing any of the three is selling the word 'probiotic,' not the science. This library's IBS, UTI, and depression pages all apply the same test to their strains.
Choosing the Right Form & Dose
Label literacy in the gut aisle has four specific jobs:
- Strain-named or nothing: the probiotic test our IBS page taught, applied at the organ — full strain designations and trial-referenced combinations, or the bottle stays on the shelf.
- CFU at expiry: cold-chain products with expiry-guaranteed counts; the '50 billion at manufacture' label is a promise, not a delivery.
- Fiber built slowly: psyllium at half-servings to start, full glass of water always — the adjusting-gas window passes if you don't rush it.
- B12 by risk profile: the vegetarians, the PPI/metformin users, the over-60s, the post-gastric-surgery — the at-risk groups our anemia page maps, dosed at 1,000 mcg.
- The standing rule: the 30-plants pattern and the daily ferment outrank this entire shelf — the gut responds to the diet far more than to the bottles.
Red Flags to Watch For
The gut-health market is the industry's most creative boomtown. Be highly cautious of products that:
- Sell 'leaky gut' cures — the mechanism is real in specific diseases, the syndrome-as-sold is not, and the proprietary protocols are evidence-free.
- Market 'microbiome-friendly' foods and blends — a marketing term with no regulatory definition; the honest version of the claim is 'contains fiber or ferments,' which the label can say plainly.
- Stack probiotics without strain names — the category word borrowed against the specific-science standard.
- Pair direct-to-consumer microbiome tests with supplement recommendations — the diagnosis machine with a shelf attached; gut symptoms get the gastroenterologist's workup, not a mail-order algorithm.