After That Lunchtime Joke, I Broke Down Every Claim I'd Heard About Japanese Tengsu, One by One

Let me answer that question first: when a coworker casually asked over lunch whether Japanese Tengsu actually counts as a health food, I couldn't answer on the spot. When I got home, I laid out every claim I'd heard, one by one, and realized most of what people were saying was really just "I heard"; the only things I could actually verify were how it's classified, what's written on the packaging, and where to go ask. This piece isn't meant to give a conclusion—it's a record of how I separated rumor from verifiable information.

That day at lunch, three men happened to end up at the same table. The coworker in his twenties said he'd scrolled past people on social media describing this kind of thing like a miracle cure, with comment sections where people compared who "felt it" more; to him, that felt more like peer atmosphere than information you could actually act on. The one in his thirties said he'd once seen a whole shelf of it in a Japanese drugstore, couldn't read what the packaging said, and only remembered hesitating for a long time before checking out. The team lead in his forties said just one thing: what's scariest about this kind of product isn't not being able to buy it—it's not knowing which category you're buying. Those three views were really three different needs: one wanted social validation, one wanted labeling he could understand, and one wanted to figure out the classification first.

When I got home, the first thing I did wasn't search for the product—it was look up what people have been arguing about regarding the term "health food" lately. One headline mentioned that health foods would be banned from using the names ginseng and Siwu Tang, with new rules taking effect as early as the second half of the year. I didn't dig into the details, because all I had was the headline; but that headline reminded me of one thing: even when products sit on the same shelf, how they're named and what they're allowed to claim is governed by rules. Another headline was about someone who aggressively took a certain trace element to grow hair and ended up with problems instead. Looking at these two together, the point isn't which product is better—it's that there's often a gap between "what you ingest" and "what's claimed."

The next day, I listed the claims I'd heard into three columns. The first column was "someone said it did such-and-such after taking it"—I put all of that under rumor, because I have no way to verify it, and I shouldn't use someone else's physical reaction as a basis. The second column was "what's written on the packaging"—that's verifiable, but only if you can read the original language or find a trustworthy translation source. The third column was "which category does this fall under in Taiwan"—that one is the most critical, because it determines whether you can just buy it yourself or need to ask a professional first. I noticed that the fiercest arguments almost always landed in the first column—the least verifiable one.

What really made me stop and think was the third column. I'd originally assumed that with this kind of thing, a quick search would give me an answer, but I later came to understand that often even "which category it belongs to" requires professional judgment. That was also the first time I seriously thought about looking for information related to Japanese Tengsu—not because someone recommended it, but because I realized I wasn't even sure what questions to ask. Rather than asking "does it work," the questions to ask first are: is it a prescription drug, what do the ingredients and warnings on the packaging say, and could it interact with other things I'm currently taking. Those are the questions you can actually bring to a pharmacist or doctor.

So I changed how I framed the question. What I originally wanted to ask was "can I take this," and I changed it to "what should I bring when I go ask." I put together a checklist: the packaging of all the health foods and medications I have on hand, the medications I'm currently taking for chronic conditions, and the three specific questions I want to ask. I didn't go looking for any testimonials, and I didn't compare who "saw results faster," because none of that is something I can verify. What I can do is confirm whether the source is legitimate, whether the packaging labeling is complete, and whether the place selling it is legally allowed to sell this category of product. These are all checks you can do without any medical conclusion.

There are several situations where you can't just apply the same judgment. First, if you're taking prescription medication, you shouldn't decide on any additional supplement on your own, because interactions can't be ruled out through online articles. Second, if the information you're seeing is only "a friend said" or "the group said," then even the product's classification hasn't been confirmed, let alone anything else. Third, if you can't read the text on the packaging, don't guess based on impressions—find someone to help you confirm the original text. Fourth, if a claim makes you feel like "something bad will happen if you don't do this," that's usually sales talk, not information. Separate these four situations, and a lot of arguments will quiet down on their own.

In the end, I didn't get an answer to "can I take it," but I got a checklist I can bring to ask. What the team lead said turned out to be right: what's scary isn't not being able to buy it—it's not knowing which category you're buying. That joke at lunch ended up becoming a piece of paper in my drawer with packaging, ingredient fields, and questions to ask written on it. It didn't make me more willing to buy—it actually made me clearer about which things shouldn't be decided by me alone. If I had to say what I learned from this whole search, it's probably this: keep rumors in the rumor column, verify what can be verified, and leave the rest to professionals—that way, at least, you won't mistake someone else's offhand remark for your own judgment.