A few days ago someone dropped a message in our patients' group chat: "Anyone want to buy olive oil together?" It came with a long pitch — loaded with cancer-fighting compounds, a hit among people going through treatment, and so on. Then I saw the price and froze. Just under 150,000 won for a single 750ml bottle. Buy as a group and they'd knock off 30 percent — which still leaves you at 100,000 won. I passed. I didn't want our group's name lending cover to a setup that empties the wallets of people already having a hard time.

These days you open any social app and there are familiar faces gulping down that expensive oil, talking like "this one bottle and you're set." The little "paid ad" tag tucked away in a corner. After a few days of that, even I started to feel a quiet pressure. So let me jot down a few things, just from what I've picked up. I'm no doctor or pharmacist — I just don't want anyone getting played.

Start with the money. The truly top-tier oil never reaches the likes of us. By the time it's harvested and filtered, fancy restaurants and fussy gourmets around the world have already snapped it up. The few importers who bring a trickle into the country sell out within half a day of opening reservations. So when something gets billed as a "special oil for patients" at several times the supermarket price, that math alone is worth a raised eyebrow.

The headline ingredient hides some number games too. Some sales pages slap a big "750" on the anti-inflammatory compound, making you think that's what lands in your mouth per spoonful. Look closer and it's "up to" 750mg per kilogram — 0.075% as a ceiling. Not a guaranteed minimum, just the best you might get. Then they imply rival oils have basically none of it, which is simply untrue. A proper extra virgin gives a sharp, peppery tickle at the back of your throat when you swallow — that bite is the compound. You don't need a pricey label to taste it.

And those piles of papers claiming it beats cancer? The conclusions that land in serious journals run more like "it may calm inflammation a bit." Maybe helpful for heading off certain inflammation-driven cancers, but it's no reason for someone in active treatment to pin hopes on a spoonful of oil. The funny part: the very products shouting "anti-cancer" are nowhere to be found on global stores like Amazon. They circulate as a domestic marketing play, nothing more.

So what do you actually buy? Just check a few things on the label. Is it the top grade, extra virgin? Was it pressed without heat — whether the old-school squeeze or the modern spin-out method, both are fine. Organic? And where's it from? Somewhere around the Mediterranean — that boot-shaped country or the peninsula next door — does the job. Rather than downing it on an empty stomach, pour it over food. Salads, sure, but it's lovely on an omelet or a fried egg too. Its smoke point is around 180°C, so you could fry with it, but the strong aroma and the cost make me say don't bother. In the end, a decent bottle off the supermarket shelf is plenty.

Being sick is heavy enough on its own. Don't let an overpriced bottle of oil weigh on you too. This isn't a prescription, just a bit of nudging from the next seat over — so whatever you eat or whichever supplement you reach for, run it by your own doctor first.