Food

💪 Protein powder / Supplements

Rules differ by region: TSA officially recommends packing powders over 12oz (350g) in checked baggage to speed up screening. Other regions don't have a formal advisory but large amounts may still attract additional inspection.

💼 Cabin bag

Yes

Permitted but TSA recommends packing powders over 12oz (350g) in checked baggage — they may be subject to additional screening.

✈️ Hold (checked)

Yes

Permitted. No restrictions.

💡 Tip: Transfer protein powder into smaller pouches or bags to reduce screening delays. Large tubs may be opened for additional testing, especially in the US.

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Protein powder / Supplements

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Airline-specific rules

🇺🇸American AirlinesProtein powder over 12oz (340g) in carry-on may require additional TSA screening; hold baggage has no such limit.

🇬🇧British AirwaysPowders over 350ml in carry-on may receive additional screening at UK airports; placing in hold avoids delays.

🇮🇪RyanairNo specific restriction, but powders over 350ml in cabin may be subject to additional screening.

Common questions

Protein powder is permitted in both carry-on and checked baggage, so it will not be confiscated outright, but TSA recommends packing containers over 350g (12oz) in checked baggage because they are likely to trigger additional screening. If you do bring a large tub in carry-on, a screener may open it for a physical inspection or swab it for explosives residue. This can add several minutes to your security experience.

The US applies the most visible guidance here — TSA actively recommends that powder-like substances over 12oz (350g) go in checked baggage. Other regions do not publish a specific weight threshold for additional scrutiny of powders, but security agencies broadly have the authority to inspect any powdered substance that raises a concern on X-ray. Large quantities of any powder can attract attention at any airport.

Yes, screeners can and do open powder containers for a closer look if the X-ray image is unclear or the quantity is large. Stay calm and cooperative if this happens — it is a routine part of enhanced screening. Having the product in its original sealed manufacturer's packaging with a clear ingredient label makes identification faster and reduces the chance of extended delays.

Transfer your protein powder into smaller pouches or bags so no single container exceeds 350g, which reduces the chance of additional screening in the US. Keep it in or near the original packaging so the product is identifiable. If you are on a long trip and need a large quantity, pack the bulk of it in checked baggage and carry only a small single-serving portion in your carry-on.