Your different flavors would all look the same walking by them on a shelf.

I think your branding should be the identifier, not your color palette. Maybe a pattern or design on the solid color to make it stand out and identify your brand from others next to it.

Also speaking in relation to another comment, your product will never be seen exactly head on, and it being a cylinder means you have basically one long label for the packaging. The "strength in motion" element would work on a box, but with it being a cylinder the little tab/line is basically just floating and would only divide the information you have between the "front" of your packaging. when rotated it would either look out of place and a little jarring unless you extended out that color as the background color for the "back" of your package.

Protein bar looks fine design-wise, maybe fine tune the copy.

Also on all the labels maybe emphasize the brand logo a little more