I dislike all the nutritional myths out there, I really never bought into them, but then again, I am always highly suspicious of anything advertised/promoted on TV, internet, flyers etc. The leading indicator of bad nutritional information is when it is tied to buying something as a result of the study findings. When I consume this information, my brain goes to...this is a means for a company to sell me something, that is in it to make a profit/sell goods. I have this attitude even with non-nutrition products from reputable companies. I know all of them are in business to make money and thus may not consider "watching out for me" as a #1 priority. I don't have an issue with companies selling there wares for a profit and I certainly am a consumer of products but I think at some young age my Dad put the idea of "be cautious" into my head. I've tempered how he felt about it but still proceed with caution and do the research as well as I can before "buying in." Time usually will tell a new or different story over and over again.

Like David, I am a skeptic about just about every fact I am fed (pun intended). I do a lot of reading, across multiple sources, before I accept a proposed fact - realizing there may be information that comes to light at a later time. We can only work with the data we have.

Yeah having spent decades in science and scientific research and participated in peer reviewed study using flax oil I am the consummate skeptic. It is traditional to limit studies to one variable but that rarely "tells the whole story". Case in point is "evïl sugar". Yes too much of many things including sugar isn't a good thing and is one factor in the development of adult onset diabetes. Having said that when we throw in the additional variable of activity (beyond the 10,000 step level anyway) it has been noted that the blood sugar spiking reduces daily and after 3 days in a row "disappears" after consuming foods including carbs and sugars.
In the days before insulin was available they walked diabetics holding their arms to help with blood sugar levels in addition to some dietary changes.

Oh and I feel your angst about eggs Dave. I honestly don't know what if any effects they have on my hereditary higher cholesterol levels. I don't tolerate statins so eat a sensible diet and move more. I take a middle of the road look at it and consume one whole egg in my omelet daily.
Yeah the whole "gluten free" thing has gone nutso. When it was discounted by the original researcher himself they then threw in a bunch of foods including cabbage and broccoli as culprits. Uh folks have known for centuries that they may be sensitive to cruciferous veggies of the cabbage family and?? I do have one friend who for whatever reason has settled down her innards by limiting "gluten". I say whatever works for you and you alone in a balanced way go for it.

Not a nutrition myth but my favorite weight loss myth was- 20 min a day, 3X per week. And for that you get the body of the Nordictrack fitness model who obviously works out as a full time job.

I was amazed at how much weight loss misinformation I had internalized from advertising.

I got suckered into the eating fat makes you fat thinking in the '90s. Eating all those boxes of Snackwell cookies did nothing positive for my waistline.

I was carb-phobic for years. It took me a really long time to realize that there is nothing inherently wrong with carbs. It just takes more calories worth to satisfy me and the high glycemic index makes me hungry more quickly after eating them.