The front of a hemp oil bottle is marketing. The back is the truth — if you know what to look for. After spending a year buying every reasonably-priced bottle I could find and testing each one against its claims, I have a short list of what actually matters.
Start with the milligrams, not the millilitres
The number printed largest on the front of the bottle is almost always the total milligrams of cannabinoids in the bottle. That number, by itself, tells you very little. What you want is the per-millilitre concentration — milligrams per millilitre — because that is the unit of a single dropper-full. A 1,000 mg bottle and a 1,500 mg bottle look like very different propositions until you notice one is 30 ml and the other is 50 ml. They are exactly the same strength.
The certificate of analysis is not optional
Every reputable hemp oil producer publishes a Certificate of Analysis (a "COA") for each batch. It is a third-party laboratory test that confirms what is in the bottle and, more importantly, what is not. A current COA should be one click away from the product page or printed as a QR code on the carton. If the brand cannot show you a COA — or the COA is from 2021 and the bottle was made last month — that bottle goes back on the shelf. Checking for these quality signs to look for can help you avoid low-quality products.
Carrier oil matters more than people admit
The cannabinoids are the active ingredients, but the carrier oil is what they live in. The two carrier oils that respect the cannabinoids are MCT (medium-chain triglyceride) coconut oil and cold-pressed hemp seed oil. The carrier oils to be sceptical of are generic vegetable oils, soybean, or anything that smells faintly chemical when you open the bottle. The nose is a surprisingly good first test. Understanding what full spectrum actually means can also help you make a more informed purchase.
"Full-spectrum," "broad-spectrum," and "isolate" — what they actually mean
"Full-spectrum" means the oil contains every cannabinoid that the plant produces, in roughly the proportions the plant grew them in. "Broad-spectrum" is full-spectrum minus the THC. "Isolate" means CBD only — every other cannabinoid removed. Each has its place. None is automatically superior. The right choice depends on what you are trying to do.
One small thing the good brands all do
The brands that consistently make the best oil tend to print the cultivar (the strain name of the hemp plant). It does not have to mean anything to you. But the fact that they thought to print it tells you they know which plant the oil came from — and that is a brand that has done the work upstream.
