Probiotics: Read the Strain and the CFU

Probiotics are live microorganisms, usually bacteria from groups like Lactobacillus and Bifidobacterium, sometimes a beneficial yeast. They're named at three levels — genus, species, and strain — and the strain is the most specific part, because effects studied for one strain don't automatically carry to another. Because the organisms are alive, count and viability through shelf life matter as much as the names on the panel.

Probiotics are studied for how they interact with the existing community of microbes in the gut. The accepted definition hinges on "adequate amounts," which is why the CFU figure exists: too few live organisms and there's no meaningful dose. People generally take them as a steady daily habit to support a balanced gut, the same way they'd keep any other routine supplement.

A useful probiotic states its strains and a CFU count, ideally guaranteed through the expiration date rather than only at the time of manufacture. Higher CFU isn't automatically better — the right number depends on the strains — but a product that won't disclose either figure is hard to judge. Capsules, chewables, and powders all work; what matters is that the live count survives to when you take it.

Monthlees offers probiotics across formats — including a 40-billion-CFU formula, chewables, and digestive blends — with the strains and counts stated on the label. That disclosure is the point: it lets you compare one probiotic to another on strain and CFU instead of taking "contains probiotics" on faith.