Is it OK to eat red and processed meat — and what about eggs and butter? A registered dietitian clears up the nutrition confusion. - NBCNewsBETTER
. In essence, it’s total bologna! Nutrition is an imperfect science because much of what we know comes from a type of study known as an observational study. To help you understand why these studies seem so conflicting, I’m going to break down some research basics. Stick with me! We’ll get to the bottom of all of this!
The most well-regarded diet-related observational studies are conducted by following people over an extended period of time , collecting dietary recalls every so often, and then determining who develops health problems. From there, researchers can see if there’s a link between a certain dietary pattern and a disease . But these studies aren’t meant to prove any cause and effect .
Another form of observational study matches people with the disease to a similar set of people who are healthy. They might look back, asking study participants questions about their diet or other lifestyle factors to see if any trends emerge. This type of data points us in the right direction, but there are obvious issues with asking people to recall how often they typically ate something or participated in another behavior in the past.
A more rigorous study is called a randomized clinical trial. This type of research design is considered the gold standard because it can prove one thing causes another thing. Though it’s a great way to study certain scientific questions, it’s not necessarily the most practical way to address the link between diet and disease since diseases may take years upon years to surface and these studies involve a more controlled set up.
So in essence, what this new report says is that observational studies don’t give us strong enough evidence to suggest that people who enjoy eating meat should stop eating it. However, when multiple observational studies make the same links, it strengthens the case. And we do have many studies along these lines suggesting that red and processed meats are associated with health problems.
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