Holiday travel brings out a familiar question: what do I do with all my vitamins? Some people throw every bottle into a carry-on, some leave everything at home and feel off for a week, and some end up explaining a bag of white powder to airport security. A little planning makes traveling with supplements simple.
Packing: bottles or pill organizers?
Original bottles are the safest choice for international travel, because they show what the product is. That matters at customs and if you get sick and a doctor needs to know what you take.
Weekly pill organizers are lighter and work well for domestic trips. If you use one, take a photo of each original label on your phone so you have the details if needed.
Powders such as protein or creatine can draw extra attention at security. Pack them in the original container or a clearly labeled bag, and consider putting them in checked luggage. In the US, the TSA may ask you to place powders over 12 ounces in a separate bin for screening.
Getting through airport security
In the United States, the TSA allows pills and solid supplements in both carry-on and checked bags, with no limit on quantity. Liquids, including liquid vitamins and fish oil in bottles, follow the usual carry-on liquids rule unless they are medically necessary. You can check the TSA's guidance on medications before you fly. Softgels and capsules are treated as solids.
Keep anything you take daily in your carry-on, in case your checked bag is delayed.
Crossing borders
Rules differ by country, and some things that are sold freely in the US are restricted elsewhere:
- Melatonin is prescription-only in the United Kingdom and many other countries.
- Some herbal products, such as kava or certain traditional remedies, are restricted or banned in some places.
- CBD is illegal in some countries, even in small amounts.
- High-dose vitamins may be classed as medicines in some countries.
Check the official government website of the country you are visiting before you go. If in doubt, leave it at home.
Keeping supplements in good condition
- Avoid the hot car. Heat damages many supplements, especially probiotics, fish oil and gummies.
- Keep them out of steamy hotel bathrooms. Humidity breaks down vitamins and makes powders clump.
- Probiotics that need refrigeration are hard to travel with. Shelf-stable versions, or simply taking a break, are fine for a short trip.
Our article on how to store supplements has more detail.
Dealing with time zones
If you take supplements at specific times, shift to the new local time as soon as you arrive. For most vitamins, the exact hour does not matter much, as long as you take them consistently and, for fat-soluble vitamins, with a meal.
Melatonin for jet lag
Melatonin is one of the few supplements with reasonable evidence for jet lag, particularly when flying east across five or more time zones. Low doses, around 0.5 to 3 mg, taken near the target bedtime at your destination, appear to work as well as higher doses. Morning daylight at your destination is just as important, because light is the strongest signal for resetting your body clock. Read more in melatonin: what to know.
Eating on the road
Travel often means irregular meals, more restaurant food and fewer vegetables. A few easy habits help:
- Pack snacks like nuts, fruit and protein bars.
- Order a side of vegetables or salad with meals.
- Carry a refillable water bottle. Airplane cabins are very dry.
- If you are prone to traveler's stomach upset, wash your hands often and follow local advice on tap water.
What you can safely leave at home
For a short trip of a few days, missing most supplements is not a problem. Your body stores many nutrients, such as vitamin D and B12, for weeks or longer. Prioritize anything your doctor has asked you to take, such as iron for anemia or a prenatal vitamin, and do not stress about the rest.
The bottom line
Pack daily supplements in your carry-on, keep labels handy, check the rules for international destinations, protect products from heat and humidity, and shift to local time when you arrive. And if you forget the vitamins, enjoy the trip anyway. A few days off will not undo anything.