I notice that the fill of powder in the canister seems to be 50-60%. Why is this?

We look at several factors in determining canister/bottle sizing. This includes FDA regulations, scooper size, production considerations (i.e., what is an optimal ratio of product fill that takes into account canister size, scooper size, etc. that will maximize production efficiencies and minimize production issues or errors), etc. The fill in each canister of Muscle Health PLUS is optimized using these considerations.