Can you take protein powder from the US to the UK?
Protein powder: us airports apply tsa's 3-1-1 rule: containers up to 100ml (3.4 oz) in a single quart-size clear bag. Small tubs are usually fine; large containers may be opened and tested at security. The cabin rule at your the US departure airport is what matters.
Triple-check
Security · Airline · BorderCheck the airport security rule for protein powder before you fly.
At the checkpoint leaving the origin airport.
Check airline and baggage rules for protein powder on this route.
Cabin vs checked baggage rules.
Check the UK import rules for protein powder.
Customs and import rules in the UK.
Email me these rules
We'll send these exact details to your inbox so you can pull them up at the airport.
We'll only use this email to send you this result. You can unsubscribe from any email.
Best packing plan
Cabin
US airports apply TSA's 3-1-1 rule: containers up to 100ml (3.4 oz) in a single quart-size clear bag. Small tubs are usually fine; large containers may be opened and tested at security.
Checked
Bulk protein powder travels fine in checked luggage.
Border
Check the UK customs or food-import rules before you fly — security clearance is not the same as import clearance.
Strictest play: Safest packing plan: keep individual containers at 100ml or less, or put the full-size item in checked luggage.
Source: TSA's national 3-1-1 rule applies at all US airports. We use TSA as the source.
This answer covers the US → the UK. The rules can change depending on where you're flying from and to — check this item for your exact route.
Protein powder vs protein shakes
"Protein" can fall into different airport rule categories depending on the form you're carrying. Here's how security usually treats each one.
- Protein powder
- Treated as a powder/food/supplement at airport security — not a liquid, so the 100ml cabin rule does not apply. Large containers may be pulled for extra screening, and destination customs can still ask about supplements, dairy ingredients or commercial quantities.
- Ready-to-drink protein shakes
- Treated as liquids. Subject to the 100ml cabin-bag rule unless bought after security airside, or specifically allowed by the departure airport (e.g. an airport with CT scanners that permits larger liquids).
- Protein gels, puddings, yoghurt-style pots or creams
- Treated as liquids/gels/creams at security. The 100ml cabin rule applies even though they look like food. Put larger pots in checked luggage.
- Protein bars
- Usually treated as solid food at security and fine in cabin. Destination customs rules can still apply — some countries restrict meat, dairy or plant-based ingredients on arrival.
Triple-check reminder
- Security: powder is not a liquid, but ready-to-drink shakes, gels, puddings and yoghurt-style pots are — those follow the 100ml cabin rule.
- Airline: whether powder travels cabin or checked depends on the container size and your airline's baggage policy.
- Border / customs: supplements, dairy-derived ingredients and food imports can be restricted at the destination — check official guidance for the country you're flying into.
Liquid Limits focuses on airport security and liquid-like travel items. Separate customs, import, airline, or destination laws may apply. CBD, alcohol, medicine, food liquids, and dangerous goods may need official destination guidance beyond airport security. What this site covers and doesn't cover.
Related guides
Packing checklist for this trip
A short checklist for this trip — pack what you need to stay within the rules above.
Get a return-flight reminder
We'll remind you before your return flight if your airport uses stricter liquid rules.
More travel questions
- Can you take olive oil from Greece to the UK?
- Can you take honey from Greece to the UK?
- Can you take perfume from Greece to the UK?
- Can you take sunscreen from Greece to the UK?
- Can you take skincare from Greece to the UK?
- Can you take wine from Greece to the UK?
Frequently asked questions
Can I take protein powder from the US to the UK?
Protein powder: us airports apply tsa's 3-1-1 rule: containers up to 100ml (3.4 oz) in a single quart-size clear bag. Small tubs are usually fine; large containers may be opened and tested at security. The cabin rule at your the US departure airport is what matters.
Can I pack protein powder in cabin baggage?
US airports apply TSA's 3-1-1 rule: containers up to 100ml (3.4 oz) in a single quart-size clear bag. Small tubs are usually fine; large containers may be opened and tested at security.
Can I put protein powder in checked luggage?
Bulk protein powder travels fine in checked luggage.
LiquidLimits.com is a travel planning tool, not an official airport or government source. Rules can change between trips and between terminals. Always check the official airport or aviation security guidance before you travel, and when in doubt pack to the stricter 100ml cabin-bag rule.