Yes, you can take vitamins in your hand luggage in 2026, though the rules vary by their physical form. Solid vitamins (pills, capsules, tablets, and gummies) are considered "unlimited" by the TSA and most international aviation authorities; you can carry as many as you need without volume restrictions. However, liquid vitamins must strictly follow the 3-1-1 rule for carry-on bags, meaning they must be in containers of 100ml (3.4 oz) or less and fit into a single quart-sized clear bag. Powdered vitamins in containers larger than 350ml (12 oz) are permitted but may require additional X-ray screening or manual inspection at the security checkpoint. For 2026 travelers, while clear labeling is recommended, vitamins do not legally have to be in their original retail packaging, though keeping them in labeled containers helps speed up the screening process and prevents any confusion during "random" security checks.