Judging quality in a CBG product.
Three checks before you buy or stock: a published COA, plain mg labeling and no disease claims.
What separates a good product from a poor one lives in the paperwork behind it, whether you stock CBG or buy it for yourself.
Three checks before you buy or stock.
A published COA
A certificate of analysis for each batch, one you can actually open and read, with the full cannabinoid breakdown and a contaminant panel. If the seller can’t produce it, move on.
Plain mg labeling
CBG stated up front in milligrams per serving. The words “proprietary blend” are where the number you needed goes to hide.
No disease claims
A reliable seller describes what is in the jar and leaves disease out of it. Any talk of effects stays conditional.
CBG is prohibited by the World Anti-Doping Agency — CBD is the only exempt cannabinoid. In a randomised trial of a broad-spectrum CBD product containing only trace CBG, CBG was detectable in urine after repeated daily use, and concentrations appeared higher after exercise. This is regulatory and testing status, not a health claim. Check the current WADA Prohibited List and your product's COA. (Gillham et al., PMID 40920736.)
Cited as an attributed regulatory and testing note. This paper is in intake review and is not yet a graded entry in the CBG Atlas registry, so it carries no evidence grade here.
Open a specimen certificate line by line in Read a COA, and test the words on a label against the evidence ladder in the Label Lab.
Before you buy
Nine checks a buyer can make from the paperwork, each linked to the instrument on the site that performs it. None of them is a health question; all of them are about what the documents should show.
A COA describes one batch. Match its batch or lot number to the one on the jar, and ask for a test date you would accept as recent. Open flag 2 on the COA flags sheet →
The lab should have a name and an address you can reach, and it should not be the brand. A brand testing itself is a claim, not a result. Open flag 1 on the COA flags sheet →
Open the cannabinoid panel and read the CBG row against the milligrams per serving the label states. The two should agree once the units do. Open the specimen certificate, line by line →
Milligrams per gram on a liquid needs a density; a label in milligrams per millilitre against a certificate in milligrams per gram needs one too. Ask for it. Open flag 5 on the COA flags sheet →
A total-CBG headline that folds CBGA in without saying so is counting a different molecule. Ask which figure the label counts. Open flag 7 on the COA flags sheet →
Not detected means nothing without the limit it was measured against. The LOQ column is the substance of every ND on the contaminant panel. Open flag 6 on the COA flags sheet →
Paste the label's wording into the checker. Words that name a disease, a treatment or a cure fail the same rules the site applies to its own answers. Open the claim checker in the Label Lab →
If the seller mentions an effect, find the rung its evidence would earn. For CBG the human record on effects is small, and most effect wording sits below Low or off the ladder. Open the six rungs on How we grade →
CBG is on the World Anti-Doping Agency prohibited list, and trace CBG in a broad-spectrum product was detectable in urine after repeated use. Check the current list and the COA. Open the anti-doping note under the buying guide →
Catalogue in progress.
This category is still waiting on its first verified listing.
The shelf is bare for now. A supplier goes up only once we can verify it, and in this category we cannot verify one yet. For a while the directory carried illustrative examples; we took them down, because a placeholder company wearing a verification badge looks exactly like a real one. In the meantime, the checks above work on any supplier you are weighing.
A listing that does go up will name a real organisation, the verification it carries and who did the checking. Inclusion cannot be bought, and Peregrine Biopharma — which funds the platform and holds no editorial authority — will be disclosed on any affiliated entry.