Yes, you can bring powder supplements on a plane in carry-on or checked luggage. If you're bringing more than 12oz or 350mL in volume (the size of a soda can) in your carry-on luggage, be sure to remove it from your carry-on and place it in a separate bin for screening when you go through the security checkpoint.

Yes, you can absolutely take protein powder on a plane in 2026, but there are specific TSA "powder rules" you should follow for carry-on bags. Any powder-like substance over 12 ounces (350 mL)—roughly the size of a soda can—may be subject to additional screening at the security checkpoint. To speed up the process, you should remove large containers of protein powder from your bag and place them in a separate bin for the X-ray machine, just like you would with a laptop. TSA officers may need to open the container to test the contents for explosives. It is highly recommended to keep the powder in its original commercial packaging so the label clearly identifies the product. If you transfer it to a plastic bag, label it clearly to avoid suspicion. There are no such quantity restrictions for checked luggage, so if you are bringing a large 5lb tub of whey, it is much easier to pack it in your hold baggage. Always check the customs rules of your destination country when flying internationally, as some nations have strict rules on importing dairy-based products.