We have a lot of choices to make about our diet. Add to that doing the right thing when it comes to preventing or treating a chronic disease, fighting a virus or losing weight, and suddenly our nutrition choices can seem almost overwhelming.

Well, I'm here to help. Welcome to the Nutrition Facts Podcast. I'm your host, Dr. Michael Greger.

I'm back on my treadmill today, right answer a multitude of your questions, including whether or not it's a good idea to get full body MRI or CAT scans, and the benefits of protein restriction. Plus I'll share with you a few dietary secrets.

Okay, this is from Aiden. Says, what do you thought some full body MRI scans and text cancer at an early stage, or the benefits outweigh the harm?

And the answer is no, they would not. Now you think it's really interesting. So this brings up the concept of overdiagnosis. You think, oh my God, that's exactly what we want, right?

Because then you can get you nip any budding tumors before they hurt you. The problem is most people have cancer, but most people die with their cancer rather than from their cancer.

And so if the cancer is not going to affect you in any way in your lifetime, you don't want to know about it because the then you just suffer, you have no benefits.

I mean, the thing is when you find you have no idea if it's going to hurt you or not. So of course you got to do something about it.

So whether it's surgery, chemo, radiation, whenever you certainly have downsides from that. And if in actuality, you would have never been affected by this tumor in the first place. So all risk, no benefit.

And so almost everyone dies with thyroid cancers, like so we're 90% on autopsy. People have thyroid cancers, but 90% of people don't know they have thyroid cancers. You don't want to know. Similarly, when you do, you know, if you look at car accident victims, women in their 30s, significant percentage, I forget I think about a quarter of women in the 30s have breast cancer.

But many, the hope is that it will grow so slowly that they never even know it by the time they died from something else.

And so because of overdignose, she said to me very careful about cancer screening.

And there are a few cancer screenings that are undeniably useful. You can actually have randomized control trials showing you actually affect all costs mortality.

She saved people's lives and that cervical cancer screening with public exams and colorectal cancer screening.

And there's a whole bunch of reasons to do that. And then there's certainly pros and cons of other screening methods, but not as both much less certain to in terms of benefit for all cause mortality.

And that includes PSA testing and mammograms and oral cancer screenings, et cetera. Anyway, great question and kind of counter into a dancer.

But in the end, we actually don't want to know in many cases and full body. And so it could start us down some therapeutic pathways that would actually do us more harm than good.

And here we go. Next question. Dana, Dana says you said cariginine extract isn't good, but it's whole irish or CMOS good as for survived.

Okay, so I was CMOS is where they get cariginine from pack with cariginine. And we know that at least the cariginine used in the food industry may cause intestinal inflammation.

I'm just starting now that the next book on that age is done and it just in fact checking and editing stages, I've started to script my next batch of videos for nutrition facts that are and I'm going to do an update on the cariginine story.

So we'll see where that leads us, but for that reason alone, I would assume that I receive us just because the cariginine content, if cariginine isn't good for you, then I receive us probably isn't good for you, there, and I don't know what the item content is.

I would stick to once I do know, which is something I dole, so RMA or Nory, stay away from kelp because there's too much item and stay away from hejiki because has too much arsenic.

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