Oral pouches, understood.

No. A nicotine-free product can contain caffeine, and several brands sell both caffeinated and caffeine-free lines. Check the exact product variation. NZE distinguishes Energy and Focus; Grinds also describes different product families. In the product browser, nicotine and caffeine have separate filters. An unknown value remains unknown rather than being assumed absent.

Some products are positioned as flavor-only pouches. That is different from caffeine-free nootropic products, which can still contain other active ingredients. Check the complete label for nicotine, caffeine and additional actives, and distinguish a zero claim from a laboratory non-detect. Grinds describes its ZERØ.Ø line separately from Focus. The current label is the useful document when a plain flavored filling is your requirement.

Milligrams per gram express concentration; milligrams per pouch express an amount in one portion. Multiply a compatible concentration by the filling weight to calculate the amount. For a hypothetical 12 mg/g filling weighing 0.5 g, the result is 6 mg per pouch. Check wrapper inclusion and dry-basis versus as-received reporting before converting. This calculation does not describe absorbed dose.

They are product descriptors whose dimensions can differ between brands and versions. Compare actual length, width and filling mass, with a source for each. The ZYN UK format description illustrates terminology within one market; it should not be applied automatically to every other brand or historical product.

Water content reports an amount under a particular method. Water activity is a different property describing the availability of water in a system. They are not interchangeable percentages. Also check whether a source defines moisture as a combined calculation that includes humectants. Use the actual method and definition when comparing formulations.

A certificate has a named subject, scope, issuer and validity period. A facility-related certificate does not automatically establish the composition, clinical efficacy, registration or batch compliance of every product made there. Check the certificate itself and obtain the separate documents relevant to the product and intended market.