Look at the actual cost of a "fat burner" before you look at the promise. Most subscription diet-pill plans bill monthly, auto-renew unless you cancel in a narrow window, and the per-capsule cost works out higher than most people notice until the third or fourth charge hits their card.
Compare that to buying whole food outright. A kilogram of dates is one purchase, one price, and it's gone when you finish it — no recurring charge, no cancellation form to hunt down on page four of a settings menu. You can see exactly how much you bought and how long it lasted.
The ingredient side tells the same story. A pill's label often hides behind a "proprietary blend," so you can't tell how much of anything is actually in the capsule. A bag of dates has one ingredient: dates. Nothing to look up, nothing to take on faith.
If you're trying to eat better as an everyday habit rather than chase a shortcut, put the money into food you'd actually keep buying anyway — a rotating stock of dried fruit, nuts, or fresh produce works out cheaper per month than most subscription boxes, and none of it depends on a "final sale" once the trial period ends.
Check the exit terms before you check the marketing copy next time. If a company makes it hard to find the cancel button, that alone tells you what kind of product it's really selling.