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Prepared meats and cancer and an unrelated question
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<blockquote data-quote="ziggy_w" data-source="post: 2242468" data-attributes="member: 323454"><p>The link between cancer and processed meats mostly stems from research based on food questionnaires. This type of research is notoriously weak as it cannot rule out any other possible causes of cancer. For example, it has been shown that people who consume processed red meat also tend to smoke more and exercise less. This is also called the healthy user bias in this type of research.</p><p></p><p>Even so, the link between consuming processed red meat and cancer is very weak -- if I remember correctly it increases the risk of colon cancer (but not most other types of cancers) by around 20%, i.e. your lifetime risk goes from 5% to 6%. Remember however, it might not actually be the processed red meat that causes this, but other unhealthy behaviors that are more common among consumers of processed red meat.</p><p></p><p>There has been a recent meta-analysis where the authors conclude that this link is not strong enough to make the recommendation to stop eating red meat or even processed red meat. Here is a link to the study <a href="https://www.ncbi.nlm.nih.gov/pubmed/25941850/" target="_blank">https://www.ncbi.nlm.nih.gov/pubmed/25941850/</a></p><p></p><p>At this point, I don't believe we really know what type of food increases the risk of cancer (other than smoking). There are even people who argue that consuming too many carbs is associated with an increased risk of certain types of cancer (e.g., breast cancer, brain cancer).</p><p></p><p>To establish a link between food and cancer, we would really need a long-term (around 10 years or longer) randomized controlled trial. This, however, imho will never be done because (a) you can't randomly assign a specific long-term diet to a group of people and expect them to follow it for 10 years if they didn't choose this way of eating themselves and (b) this type of study would be prohibitively expensive. So, we might never really know which type of diet lowers the likelihood of cancer and can only guess based on our interpretation of the evidence.</p><p></p><p>You might want to have a look of the Virta Health study on the benefit of a low-carb diet on diabetes if you are open to looking at other ways of eating.</p><p></p><p>[Moderator edit of quote from previously deleted post.]</p></blockquote><p></p>
[QUOTE="ziggy_w, post: 2242468, member: 323454"] The link between cancer and processed meats mostly stems from research based on food questionnaires. This type of research is notoriously weak as it cannot rule out any other possible causes of cancer. For example, it has been shown that people who consume processed red meat also tend to smoke more and exercise less. This is also called the healthy user bias in this type of research. Even so, the link between consuming processed red meat and cancer is very weak -- if I remember correctly it increases the risk of colon cancer (but not most other types of cancers) by around 20%, i.e. your lifetime risk goes from 5% to 6%. Remember however, it might not actually be the processed red meat that causes this, but other unhealthy behaviors that are more common among consumers of processed red meat. There has been a recent meta-analysis where the authors conclude that this link is not strong enough to make the recommendation to stop eating red meat or even processed red meat. Here is a link to the study [URL]https://www.ncbi.nlm.nih.gov/pubmed/25941850/[/URL] At this point, I don't believe we really know what type of food increases the risk of cancer (other than smoking). There are even people who argue that consuming too many carbs is associated with an increased risk of certain types of cancer (e.g., breast cancer, brain cancer). To establish a link between food and cancer, we would really need a long-term (around 10 years or longer) randomized controlled trial. This, however, imho will never be done because (a) you can't randomly assign a specific long-term diet to a group of people and expect them to follow it for 10 years if they didn't choose this way of eating themselves and (b) this type of study would be prohibitively expensive. So, we might never really know which type of diet lowers the likelihood of cancer and can only guess based on our interpretation of the evidence. You might want to have a look of the Virta Health study on the benefit of a low-carb diet on diabetes if you are open to looking at other ways of eating. [Moderator edit of quote from previously deleted post.] [/QUOTE]
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