There's nothing wrong with travelling with supplements.
Over the past few months, I've travelled to several different countries carrying all the supplements I need in my suitcase (checked in).
I take protein powder tubs, Flameout, HRX, TRIBEX, Superfood, Spike, BCAA's, ZMA and I've never ever had any problems with Airport security.
I've even had my baggage randomly checked at London Heathrow airport, all the items were taken out, looked at, and then put back without any questions.
Don't worry about it.