01The rules in detail
TSA’s powder rule: powders over 350 ml in carry-on get additional screening and can be opened or prohibited if they can’t be cleared. Airports on US-bound routes apply the same limit. Small amounts (single-serve sachets, a shaker’s worth) pass easily. Powders in checked bags are unrestricted at security. Customs may still care: some supplements and herbal powders are controlled abroad.
02Tips
- Decant a few servings into a shaker or sachets for the cabin.
- Keep the labelled tub in checked luggage.
03Frequently asked
Can I bring protein powder in my carry-on?
Yes, with limits. Powders are allowed in carry-on, but in the US containers over 12 oz (350 ml) need separate screening and may be refused; on flights to the US from abroad, powders over 350 ml are often not allowed in the cabin. Put large tubs in checked bags.
Can I pack protein powder in checked luggage?
Yes. Powders are allowed in carry-on, but in the US containers over 12 oz (350 ml) need separate screening and may be refused; on flights to the US from abroad, powders over 350 ml are often not allowed in the cabin. Put large tubs in checked bags.
Are the rules the same outside the US?
Mostly similar for liquids and batteries, which follow international standards, but sharp objects, tools, lighters and self-defense items vary widely by country. Check the departure airport's rules and the destination's laws.
TSA and other agencies allow officers to refuse any item they judge unsafe, and rules change. This page summarises published guidance as of the verified date; confirm on tsa.gov or your airport's site before packing anything unusual.