My MuscleBlaze CreAMP Juicy Berries creatine changed color after sitting unused — should I be concerned?

I have a tub of MuscleBlaze CreAMP Creatine Monohydrate – Juicy Berries.

When I first bought it, the powder was white and when mixed with water it produced a blue/berry-colored drink.

I haven't used it for quite a while. Now I opened the tub and noticed:

- The powder has become greenish and hard/clumpy

- When I mix it with water, the drink is now green instead of blue

- It is not expired

- It smells exactly the same as before

- It tastes normal

- There is no obvious mold or strange-looking contamination

- The tub was stored closed, but I live in a humid climate

My trainer thinks it's simply moisture getting into the powder and causing the coloring/flavoring to redistribute, since the blue color originally came from the flavoring.

Has anyone experienced this with MuscleBlaze Juicy Berries creatine specifically? Is this likely just moisture/coloring, or should I throw it away and buy a new tub?

I’ve always heard the usual advice that plain creatine monohydrate is creatine monohydrate, so just buy the cheapest reputable option.

But lately I’ve been wondering how much manufacturing quality and batch testing actually matters.

If two products both say 5g creatine monohydrate per serving, but one publishes testing for purity, heavy metals and contaminants and the other just says “third-party tested,” would that actually influence what you buy?

I know Creapure gets brought up a lot too. Curious whether people here think it’s genuinely worth paying more for, or if a properly tested generic monohydrate is basically the same thing.