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.
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.
Related items
Browse all Food →Based on official TSA guidelines. Rules vary by airline and route — always verify with your carrier before travel. · Rules last verified May 2026.
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