Now you must accept that the supplement to the weight of up to 5 g contains some additives that are the company's secret.
This could be true but I would bet lots of my own money it is not.
Or that the weights and values are based on a typically sized scoop which was 4.5-4.6g rounded up to 5g. One or the other.
This could also be true but I would bet lots of my own money it is not.
This company is selling a mixture of 4 things:
all 4 reagents will be bought to a specification which will not be 100% more likely is >99%.
They will be weighed out individually and mixed which will have an accuracy of again something like >99% for each weighing.
When you put all that together the most likely assumption is that the 4 raw materials are mixed together and the errors are potentially ~8% combined and 92% of 5g is 4.6g.