"Cost per serving" is the number brands hope you stop at
Here's a quiet trick in the colostrum aisle: a brand can advertise a low "cost per serving" simply by making the serving small. If one product's serving is 1 gram and another's is 2 grams, comparing their per-serving prices is comparing a half-scoop to a full one.
The honest way to compare is cost per gram — or better, the cost to take the same daily amount from each brand. That's a number that can't be gamed by shrinking a scoop.
So let's do the real math, in the open, with a calculator you can run yourself.

