For context on how regulators define product categories, check the FDA's market and distribution pages and the CDC's tobacco data. These won't give you market size, but they shape the definitions that commercial reports use.

If you're new to reading market reports, our guide on how to gauge vape market size before stocking up runs through a practical checklist. And if compliance is part of your planning, the 2026 tech stack guide covers how reporting requirements are evolving.