Hemp seed oil is the edible oil pressed from the seeds of Cannabis sativa, usually by cold pressing, and it is essentially a culinary and cosmetic oil rich in polyunsaturated fatty acids. It is not CBD oil. The seeds themselves do not naturally contain meaningful amounts of CBD or THC; any cannabinoids in a seed oil are traces picked up from the outer shell and from contact with flowers and leaves during harvest and processing. CBD oil, by contrast, is made by extracting the flowers and leaves, where cannabinoids are actually produced, and is usually diluted in a carrier oil. The two products can look identical on a shelf, which is why reading the label properly matters more than the word “hemp” on the front.
Hemp seed oil vs CBD oil: the core difference
The confusion comes from one plant supplying two very different raw materials.
The US Food and Drug Administration states it directly: hemp seeds “do not naturally contain THC or CBD”, and the hemp seed ingredients it has evaluated contain only trace amounts, which the seeds may pick up during harvesting and processing when they touch other parts of the plant. The Austrian food safety agency AGES says the same from the other direction: cannabinoids are stored in glandular hairs in the flowering area, while hemp seeds do not contain cannabinoids but are rich in fatty oil. A 2024 review of cutaneous hemp products in Pharmaceutics describes hemp seed oil as containing phytocannabinoids “only in traces”.
| Hemp seed oil | CBD oil | |
|---|---|---|
| Made from | Seeds | Flowers and leaves (extract) |
| How | Pressing, usually cold | Solvent or CO2 extraction, then diluted |
| Main components | Fatty acids, tocopherols | CBD (plus other cannabinoids), in a carrier oil |
| CBD content | Trace at most | Stated in mg per bottle or per ml |
| Typical use | Food, cosmetics | Sold as a cannabinoid product; rules vary by country |
How to tell from the label
- Look for a cannabinoid amount. A genuine CBD product states CBD in milligrams per bottle or per ml, ideally backed by a lab certificate. “Hemp” plus a large number with no unit is not a CBD content.
- Read the ingredient list. If the only ingredient is hemp seed oil, or the cosmetic name Cannabis Sativa Seed Oil, the product is seed oil.
- Check the price logic. Seed oil is a commodity food oil. A small bottle of “hemp oil” priced like a CBD product but with no stated cannabinoid content is a red flag.
- Beware of dual wording. Terms like “hemp extract” can mean either; only the certificate of analysis settles it.
What is in it
Nutrition is a separate topic, so only the essentials here. A 2022 study of nine cold-pressed hemp seed oils in the journal Antioxidants describes hemp seed oil as a source of polyunsaturated fatty acids, in particular linoleic acid at around 55% and alpha-linolenic acid at around 20%, with smaller amounts of gamma-linolenic and stearidonic acid. The Pharmaceutics review adds tocopherols, carotenoids, phytosterols and chlorophyll, which is why unrefined oil is green.
THC contamination and legal limits
Although the seed kernel is nearly free of cannabinoids, the shell is not clean. A 2025 study in the Journal of Cannabis Research measured 300 mg/kg THC in husk material against 2 mg/kg in the kernel. How well seeds are cleaned before pressing therefore has a direct effect on the oil.
That is why regulators set limits. In the EU, maximum levels for THC in hemp seed products have applied since 1 January 2023; AGES reports them as 3 mg/kg for hemp seeds, flour and protein and 7.5 mg/kg for hemp seed oil, set out in Regulation (EU) 2023/915. The limits are not academic. A 2026 systematic review on CBD and hemp oil use and drug tests in the International Journal of Legal Medicine includes an Italian case of a young child who developed cannabinoid intoxication after being given a hemp seed oil later measured at 0.06% THC, far above the EU limit for seed oil. The same review reports other studies in which hemp seed oil use did not produce positive confirmatory tests, which is what the limits are designed to achieve.
Uses in food and cosmetics
In the United States, the FDA evaluated notices classing hemp seed oil, hulled hemp seed and hemp seed protein as generally recognised as safe, raised no questions, and these can be marketed in human food for the notified uses. In food it is best used cold, in dressings or drizzled over finished dishes. The Pharmaceutics review notes it is widely used in skin care because of its fatty acid profile; that is a cosmetic use, not a treatment claim.
Storage: it oxidises quickly
The same polyunsaturated fatty acids that make the oil interesting also make it fragile. The Antioxidants study describes them as highly prone to oxidation, and in its accelerated storage test the oils developed aldehydes, ketones and acids typical of rancidity while their antioxidants declined. A 2024 shelf-life study in the journal Molecules compared four packaging options over 270 days and found oil stored in amber glass wrapped in aluminium foil at refrigerated temperature was best protected.
Practical points that follow from those results:
- Buy small bottles and in dark glass.
- Refrigerate after opening.
- Avoid high-heat cooking such as frying.
- A rancid smell is a sign the oil has oxidised.
“Hemp seed oil for dogs”
This is a common search, so a direct answer: there is not enough evidence to recommend hemp seed oil for dogs, and this post gives no feeding advice. The FDA notes that its GRAS evaluations covered human food only and that it has not received GRAS notices for hemp-derived ingredients in animal food. If you are considering it for a pet, ask a veterinarian first, and do not confuse it with CBD products for animals, which raise separate questions.
Common mistakes
- Buying seed oil expecting CBD.
- Assuming “hemp” on the label means zero THC. Seed oil is limited, not guaranteed THC-free; look for a test result.
- Storing it warm and in light.
- Treating cosmetic benefits as medical claims.
Thailand context
Thai rules treat seed products differently from flowers and extracts. The Notification of the Ministry of Public Health Re: Controlled Herbs (Cannabis), B.E. 2568 makes only cannabis flowers a controlled herb, and the Ministerial Regulation on Cannabis or Hemp Extracts B.E. 2569 governs extracts above 0.2% THC by weight. Food and cosmetic registration is a separate matter, so check the current requirements before selling or importing any hemp seed product.