Updated 2026-06-21 · 5 min read
How to check a supplement is genuine in Thailand
To verify a supplement in Thailand, check that it carries a Thai FDA registration, confirm the brand's own authenticity code (such as Optimum Nutrition's TRU Seal 6-digit code), make sure the induction seal is intact, and read the batch and expiry. Buying in person from an authorized seller like UnReal Supplements lets you check all of this before you pay.
1. Thai FDA registration
Every dietary supplement must be registered with the Thai FDA before it can legally be imported, distributed, or sold in Thailand. A legitimate imported product carries Thai-language regulatory labelling and an FDA registration, and you can check a product's registration through the Thai FDA's official portal. If a product has no Thai FDA registration and no Thai import labelling at all, treat that as a red flag.
2. The brand's own authenticity code
Major brands run their own anti-counterfeit systems. Optimum Nutrition, for example, puts a TRU Seal sticker with a unique 6-digit code on its tubs, which you verify on its official authentication site. If a code fails to verify, or the sticker is missing on a product that should have one, do not buy it.
3. Seal, batch and expiry
- The foil or induction seal under the lid should be fully intact and untampered.
- There should be an inkjet-printed manufacture date, expiry date, and batch/lot code, not a sticker slapped over a scratched-out one.
- If you are unsure about a batch, reputable brands let you confirm it with their customer service.
4. Buy where you can inspect it
The single most effective check is buying in person from an authorized seller, because you can do every check above before money changes hands. At UnReal Supplements inside UnReal Gym on Sukhumvit Soi 24, two minutes from Phrom Phong BTS, you can hold the product, check the seal and code, and ask. That is something a marketplace listing cannot offer.
Frequently asked
- How do I verify a supplement with the Thai FDA?
- Legitimate supplements sold in Thailand must be registered with the Thai FDA and carry Thai regulatory labelling. You can check a product's registration through the Thai FDA's official portal (fda.moph.go.th). No Thai FDA registration and no Thai import labelling is a warning sign.
- How does the Optimum Nutrition TRU Seal work?
- Genuine Optimum Nutrition tubs carry a TRU Seal sticker with a unique 6-digit code that you enter on ON's official authentication site to confirm it is real. Check that the seal is present and the code verifies before you trust the product.
- What should an imported supplement label show in Thailand?
- Expect Thai-language regulatory labelling and an FDA registration, an intact induction seal, and clearly printed manufacture, expiry and batch codes. Missing Thai labelling or tampered codes are reasons to walk away.