Protein Powder
Protein powder is allowed, but containers over 12 oz in carry-on need separate screening.
Carry-on
Allowed with conditions
Checked
Allowed
Carry-on details
Allowed with conditions. Powders are not treated as liquids, so there's no 3.4 oz limit. However, under TSA's powder screening rule, any powder-like substance in a container larger than 12 oz (350 mL) in carry-on must be taken out and placed in a separate bin for X-ray screening, and may need additional inspection. Containers of 12 oz or less screen normally with the rest of your bag.
Checked-bag details
Allowed. No powder restriction applies to checked baggage.
Quantity limit
12 oz (per container)
Special instructions
Containers larger than 12 oz should be packed in an easily accessible spot in your carry-on, since they'll need to be removed for separate screening.
FAQ
- Is there a size limit for protein powder in carry-on?
- There's no outright ban, but containers over 12 oz (350 mL) must be screened separately from the rest of your bag, which can add a little time at the checkpoint. Smaller containers screen normally.
Related items
Source: TSA — What Can I Bring? · Last verified: 2026-07-30
Final decision rests with the security officer at the checkpoint.