Blink and it’s gone. The ephemeral McRib sandwich appears at McDonald’s infrequently and only for a limited time. If you haven’t indulged in one yet, here’s what you’re missing: azodicarbonamide, ammonium sulfate and polysorbate 80 — those are just three of the 70 ingredients (34 in the bun alone) that go into the BBQ pork sandwich, according to the restaurant’s website. …

If the chemistry-lab ingredient list isn’t enough to put you off the McRib’s saucy allure, perhaps the nutrition information will: with 980 mg of sodium (more than half your recommended daily intake) and 10 g of saturated fat, the sandwich is, quite literally, not for the faint of heart.