I have not yet experience with new bags, but I have experience with old bags and spoon. As everyone knows, spoon of powder which should be 50g is actually less than 50g. So after taking out 3x 3.5 spoon of powder from old bag (which should be 525g), there could be even like 40g of powder remaining (almost 1 spoon).
For that reason I’ve decided to use plastic food bags plus kitchen scale to solve this problem. So I’m unsealing bag and splitting it’s contents into plastic food bags using kitchen scale to accurately measure each portion. After that I have portions of powder which can be directly moved to shaker - each in it’s own plastic food bag.
The question is: do I lose something, keeping powder in plastic food bag for some time - like e.g. 2 weeks. Which ingredients of Plenny Shake can be considered as lost and which can be considered as harmful (if any) after keeping powder in plastic food bags?