Because they are the three skills that did all the work on this site — and because two of the three can be run on almost any product, while the third cannot be run on this one at all.
The first is about percentages. On a complete Supplement Facts panel, a printed %DV is the one figure a reader can check without leaving the label: divide the declared amount by the published Daily Value, multiply by a hundred, compare. There is no percentage column on this product, because there is no panel to print one on. The guide teaches the check anyway, and then says plainly what the absence does and does not mean — because most botanical extracts have no Daily Value established in the first place, and that is not the problem here.
The second is about reading a claim. Almost everything printed on the front of a supplement is a structure-function claim, a badge, or a mood. This bottle carries three claim bars — Supports Clear Breathing, Natural Lung Support and Fast-Acting Spray — and on the only face supplied to this desk not one of them carries a dagger or an asterisk, and no FDA disclaimer is visible on it. Sorting three phrases like those into the right piles takes about ten minutes to learn and changes how every pack in the aisle reads.
The third is about checking an amount against the research. It is the method this desk normally runs on every page, and here it cannot be run: five ingredients are named and not one carries a weight. So the guide sets the method out in full, shows exactly where it stops, and then does the one thing still possible — reading a source properly. The European Medicines Agency monograph on mullein is the worked example, and it fails three separate checks before the dose question is even reached.
None of the three is a sales page. All three are written so they would still be worth reading if you never bought this product, which is the only honest test of whether a guide on a retailer's website is a guide or an advertisement. This site earns a commission on orders placed through it, and that is exactly why the guides are demonstrated on our own label rather than on somebody else's.