reSee.it Podcast Summary
Alzheimer's disease has traditionally been viewed as a result of amyloid beta plaques and neurofibrillary tangles in the brain, which can only be confirmed postmortem. This has led to a need for a paradigm shift in understanding the disease. Emerging research suggests a metabolic theory of cognitive decline, indicating that markers of metabolic health, such as fasting insulin and glucose levels, may be more predictive of Alzheimer's risk than age. A Finnish study found that fasting insulin was a stronger predictor of Alzheimer's than age.
The hippocampus, crucial for memory and learning, relies on glucose and ketones for energy. Insulin regulates glucose transport in the hippocampus, and as insulin resistance develops, the brain struggles to access glucose, leading to an energy deficit. This has led some researchers to label Alzheimer's as "type 3 diabetes," highlighting the connection between insulin resistance and cognitive decline.
Insulin's role extends beyond glucose control; it affects every cell in the body. Chronic high carbohydrate intake leads to elevated insulin levels, causing insulin resistance and metabolic dysfunction. This dysfunction can manifest in various health issues, including cognitive decline, PCOS, and erectile dysfunction, all linked to insulin resistance.
Research indicates that even in early cognitive decline, glucose metabolism in the brain is impaired while ketone metabolism remains intact. Studies show that dietary changes, particularly reducing carbohydrates and increasing healthy fats, can improve cognitive function. The food we consume plays a critical role in either exacerbating or alleviating chronic diseases, including Alzheimer's.
To combat cognitive decline, individuals should focus on improving metabolic health through dietary changes, such as reducing refined carbohydrates and increasing healthy fats. This approach not only addresses Alzheimer's risk but also enhances overall well-being. The message is one of empowerment: individuals can take control of their health through informed dietary choices.