This is what I do and never had any problem ever in 20+ trips. I pack the daily dosage of vitamins in individual plastic or foil wrap and there could be 14 little packs in a ziploc bag. I grab one packet each day and take them. I have nothing left at end trip end, and have done this in carry on or checked luggage. Never questioned ever. You won't have a problem, in my opinion. I have brought some back home, too and never questioned, even if I was randomly stopped by TSA.