I’ve brought a suitcase completely filled with Surge recovery and Metabolic Drive before…no problems.
I’ve also brought a suitcase completely filled with vitamins to China, and although they asked what it was, they didn’t bother to check when I told them it was vitamins.
If you’re in doubt, just check it.[/quote]
Actually I would not check the bag. You are most likely to have something confiscated in a checked back rather than having it in your carryon where you can explain to the person what it is. The only time that I have had items taken was when they were checked.
As long as the supplements are in marked containers or bags you will not have any problems - I have traveled dozens of times with numerous supplements, sometimes an entire gym bag full of them. I have also had protein powder and creatine in unmarked ziplock bags and was not questioned, even when I was searched at one airport where they took my peanut butter (which is apparently a “liquid”).
Just be aware of the liquid regulations that were mentioned above.