Does Alzheimer’s Protect You from This Deadly Disease? (Wait, What?)
If you or someone you love has been touched by Alzheimer’s disease, you already know the toll it takes on memory, relationships, and daily life.
Watching someone struggle with this illness is heartbreaking. And for many, it’s a frightening glimpse into the future.
But as strange as it may sound, some new research offers an unexpected twist in the relationship between Alzheimer’s and another serious health concern: cancer.
In fact, people with Alzheimer’s seem to be less likely to develop certain types of cancer. And new findings in rodents are beginning to explain why.
Researchers in China recently observed that mice with Alzheimer’s-like symptoms were more resistant to colorectal cancer than those without. Even when scientists artificially induced colon cancer in these mice, the incidence of tumors was lower than expected.
What’s even more interesting is that when these mice were given a stool transplant from a healthy mouse, their cancer risk shot right back up to normal levels.
This might sound strange, but it points to a critical link between Alzheimer’s, cancer, and the gut microbiome—the collection of bacteria that live in your digestive system.
In simple terms, this research suggests that people with Alzheimer’s may have gut bacteria that suppress intestinal inflammation—which in turn could lower the risk of cancer. Scientists think a specific group of bacteria, called Prevotella, might be key players.
These bacteria seem to reduce harmful inflammation, making it harder for cancer to take hold, even though they might contribute to cognitive dysfunction.
But the link goes both ways. Studies have shown that people with cancer also have a lower risk of developing Alzheimer’s. One study found that people with cancer were 35 percent less likely to develop Alzheimer’s disease, and now we’re starting to understand why.
This emerging research builds on past studies that show how the gut microbiome affects brain health. For example, previous experiments have demonstrated that stool transplants can even pass on memory issues from one rodent to another. It’s becoming clearer that the gut-brain connection plays a significant role in both cognitive function and disease development.
While it’s still too early to draw concrete conclusions for humans, the gut-brain axis is a promising area of study that could revolutionize the way we approach both cancer and Alzheimer’s in the future.
As science continues to explore the intricate link between the gut, Alzheimer’s, and cancer, there are natural steps you can take now to protect your brain and defend against colon cancer:
- Eat more fiber-rich foods: Diets high in fiber, especially from fruits, vegetables, and whole grains, support a healthy gut and may lower the risk of both Alzheimer’s and colon cancer.
- Include probiotics and prebiotics: Foods like yogurt, kefir, sauerkraut, and garlic help boost healthy gut bacteria, which in turn may protect against inflammation linked to both diseases.
- Exercise regularly: Physical activity not only benefits cognitive health but also reduces the risk of colon cancer. Aim for at least 30 minutes of exercise most days of the week.
To learning about the body’s surprising connections,
Rachel Mace
Managing Editorial Director, e-Alert
with contributions from the research team
Sources:
Cassella, C., & Cassella, C. (2024, September 24). Mysterious Link Between Alzheimer’s And Cancer May Finally Be Explained. ScienceAlert. https://www.sciencealert.com/mysterious-link-between-alzheimers-and-cancer-may-finally-be-explained
