
CBD vs THC: Chemistry, Legal Status and Lab Labels
24/10/2026
Cannabis Terpenes: A Guide to Aroma and Flavour
24/10/2026Last updated October 2026.
CBD (cannabidiol) is now sold in many forms, from oils to creams and snacks, and a lot of half-truths have grown up around it. This article looks at eight common myths about the legality, labelling, THC content and quality of CBD products, with a focus on Thailand. We are not covering health questions here.
At a glance
- CBD extracts and cannabis flower follow different rules in Thailand.
- An extract containing more than 0.2% THC by weight is still a narcotic.
- Cannabis products should not be imported or carried out of Thailand.
- Many CBD products contain at least a trace of THC.
- Labels can be wrong: look for an independent CoA that matches the batch number.
Myths about the law
Myth 1: CBD and cannabis flower follow the same rules in Thailand
Reality: they are regulated differently. Since June 2025, cannabis flower has been a controlled herb that licensed outlets may only supply to a buyer with a valid prescription, usually on the official form known as ภ.ท.33 (PT 33). Recreational sales and advertising of flower are banned.
CBD extracts sit under a different set of rules. When cannabis was removed from Thailand’s narcotics list in 2022, an exception was kept for extracts: an extract containing more than 0.2% THC by weight is still a narcotic. A Thai PBS policy report from October 2026 confirms this remains the position, and CBD products below that THC threshold are generally available without a prescription.

Myth 2: Any CBD product on a Thai shelf is automatically legal
Reality: products still have to meet the rules for their category. Packaged foods containing cannabis ingredients need a Thai FDA food registration number, a Thai-language label and the required warnings before they can be sold. The Thai FDA has warned the public about smuggled cannabis sweets with no Thai label. A quick check of any packaged CBD product: look for a Thai-language label, a Thai FDA number where one is required, a batch number and the amount of CBD and THC stated.
Myth 3: If it is legal here, I can take it home or bring it in
Reality: no. Thailand’s 2022 exception for low-THC extracts applies to extracts from cannabis grown in Thailand, and importing cannabis extract still breaches the Narcotics Code even below 0.2% THC.
Going the other way, Thai police warned travellers in July 2026 not to carry cannabis products out of the country, and specifically mentioned items such as herbal inhalers, tea, confectionery and cosmetics. Penalties under Thai customs law can be severe, and many destination countries have far stricter laws.
Myths about THC
Myth 4: CBD products contain no THC
Reality: not necessarily. CBD and THC come from the same plant and the same chemical pathway, and many CBD products contain at least a trace of THC. The legal threshold in Thailand is a limit, not zero.
Research elsewhere shows how this plays out. A 2017 study in the journal JAMA tested 84 CBD extracts sold online in the United States and detected THC in 18 of them, about 21%. A much larger review of US lab data found that many CBD-dominant flower samples still contained THC above the US hemp limit.
Myth 5: CBD gets you high
Reality: CBD is not intoxicating in the way THC is. The two molecules have the same chemical formula but a different shape, and they behave differently in the body. Our article on CBD vs THC explains the chemistry. This does not make every CBD product THC-free, which is why Myth 4 matters.
Myth 6: CBD cancels out THC
Reality: the evidence does not support this as a general rule. In a 2022 trial at King’s College London, 46 volunteers inhaled cannabis containing the same amount of THC with different amounts of CBD added. The researchers reported that none of the CBD levels studied protected volunteers from the acute negative effects of THC, and the only CBD-related change they saw was more coughing.
So a high CBD figure on a label does not mean THC can be ignored. Look at both numbers.
Research on CBD and health is ongoing, and the evidence is limited for most claims you see online. If you are thinking about CBD for a health reason, please speak to a Thai-licensed medical practitioner.
Myths about labels and quality
Myth 7: The label always tells you exactly what is inside
Reality: labels can be wrong. In that same JAMA study, only about 31% of the 84 products were accurately labelled for CBD. Around 43% contained more CBD than stated and around 26% contained less.
The safest approach is to look for a certificate of analysis (CoA) from an independent lab that matches the batch number on the pack. Our guide to what GACP and CoA mean explains how to read one.
Myth 8: Packaging and buzzwords tell you about quality
Reality: words like “pure”, “premium” or “full spectrum” are marketing terms, not test results. Quality is shown by:
- Lab report: a CoA from an independent lab that matches the batch number.
- Test results: figures for THC and CBD, plus contaminant tests where available.
- Labelling and source: clear, honest labelling in Thai and a traceable source, such as a GACP-certified Thai farm for flower-derived products.

Key takeaways

If you would like to talk any of this through, you are welcome to visit our store on Pattaya 3rd Road or contact the CannaBuri team with your questions. Our team can show you lab reports and explain how Thai rules apply to different products.
This article is general information, not legal or medical advice.
Sources
- Tilleke & Gibbins: Thailand removes cannabis from the narcotics list (June 2022)
- Thai PBS Policy Watch: Draft Cannabis Control Act under Council of State review (October 2026, Thai)
- The Thaiger: Cannabis in Thailand 2026, the new medical-only rules (August 2026)
- Tilleke & Gibbins: Thailand’s cannabis reset, dispensaries to clinics (January 2026)
- Tilleke & Gibbins: Thailand’s new cannabis controls impact doctors, dispensaries and growers (September 2025)
- Thansettakij: Thai FDA warning on cannabis foods and registration numbers (2023, Thai)
- Khaosod English: Thai police warn travellers over cannabis smuggling risk (July 2026)
- JAMA: Labeling accuracy of cannabidiol extracts sold online (Bonn-Miller et al., 2017)
- PLOS ONE: The phytochemical diversity of commercial Cannabis in the United States (Smith et al., 2022)
- King’s College London: Cannabis not made safer by increasing its CBD content (2022)
- Wikipedia: Cannabidiol

