> wads of travel cash

Be very careful about this. It is a good way to get your money "stolen" through Civil Asset Forfeiture:

https://en.wikipedia.org/wiki/Civil_forfeiture_in_the_United...

> A 2020 study found that the median cash forfeiture in 21 states which track such data was $1,300

It doesn't have to be a lot of cash, and in fact smaller amounts are more likely to be taken so that there is less of a fight to try to get it back.

I strongly advise keeping all supplements in a checked bag, with good written labels about what they are. I keep them in ziploc bags with very clear labels. For mixed stacks, write DAILY VITAMINS, DAILY PROTEIN, etc.

If you carry them with you while going through security, you're just asking to be strip searched and questioned.