Yes, you can take protein powder on an EasyJet flight, but you must be mindful of how you pack it. In your checked luggage, there are generally no restrictions on the amount of powder you can carry. In your carry-on bag, however, security regulations (especially in the UK and EU) have become stricter. While not a liquid, large quantities of powders can obstruct X-ray images, leading to additional manual screening or even confiscation if the substance cannot be verified. It is highly recommended to keep the powder in its original, sealed commercial packaging so security can easily identify the ingredients. If you are flying to the U.S. or other specific regions, there may be a "12-ounce" (roughly 350ml) limit on powders in the cabin. To avoid delays, it is best to pack larger tubs in your hold luggage and only carry what you absolutely need for the journey in your hand luggage.