Start with milligrams per serving
The most prominent number often describes the total CBD in the whole container. Divide that total by the number of measured servings to understand what one serving provides.
For example, a 10 ml oil labelled 500 mg contains 500 mg across the bottle, not in every drop. A label should provide enough information to calculate a repeatable serving.
Read beyond the front panel
The ingredient list tells you what the product actually contains. In an oil, look for the carrier oil and flavourings as well as the CBD ingredient. On gummies or capsules, check allergens, sweeteners and the number of units.
Also look for a batch number, best-before date, business contact details and storage instructions. Those details make a product traceable if a problem or recall arises.
Match the batch to the lab report
A certificate of analysis is most useful when its batch number matches the product in your hand. Check the test date and laboratory name. The measured CBD should be reasonably close to the label claim.
A broader report may include controlled cannabinoids and contaminants such as heavy metals, pesticides, microbes and residual solvents. A QR code is useful only if it opens a readable report for the correct batch.
Check the regulatory context
For ingestible products in England and Wales, search the current FSA public list using the exact brand and product details. A listing does not mean the FSA endorses the product.
Keep the FSA's 10 mg daily guidance for healthy adults in mind when comparing suggested servings. If the arithmetic is unclear, the product is not making an informed choice easy.
Sources and further reading
We prioritise primary UK regulatory sources and review links when this guide is updated.