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American Focus > Blog > Tech and Science > Insulin Isn’t Just Made by The Pancreas. Here’s Another Location Few Know About. : ScienceAlert
Tech and Science

Insulin Isn’t Just Made by The Pancreas. Here’s Another Location Few Know About. : ScienceAlert

Last updated: June 17, 2025 4:00 am
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Insulin Isn’t Just Made by The Pancreas. Here’s Another Location Few Know About. : ScienceAlert
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The human brain is a fascinating organ that continues to surprise us with its capabilities. One such discovery is that the brain has the ability to produce insulin, the same hormone that is traditionally associated with the pancreas. This revelation challenges the conventional wisdom about insulin production and its role in regulating blood sugar levels.

Insulin-producing cells, known as beta cells, have long been recognized in the pancreas. However, it wasn’t until the late 1970s that researchers discovered high levels of insulin in the rat brain, indicating that the brain is also capable of producing this vital hormone. Despite this groundbreaking finding, the significance of brain insulin production was largely overlooked for several decades.

Further studies in the 1980s suggested that insulin found in the brain may actually originate from the pancreas, leading to the assumption that all brain insulin is derived from circulating blood. However, recent research has shed new light on the presence of multiple types of insulin-producing cells in the brain, each serving specific functions.

One type of brain cell, the neurogliaform cell, has been shown to produce insulin in response to glucose levels, similar to pancreatic beta cells. This discovery suggests a potential link between brain insulin production and cognitive function. Additionally, other brain cells, such as neural progenitors in the olfactory bulb, also produce insulin, though their precise role remains unclear.

Interestingly, insulin production in the hypothalamus, a brain region responsible for growth and metabolism, has been linked to regulating growth hormone levels. Studies have shown that decreased hypothalamic insulin production can lead to impaired growth in mice, highlighting the importance of local insulin sources in maintaining physiological balance.

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Moreover, insulin production in the choroid plexus, a brain region that produces cerebrospinal fluid, has been found to influence appetite control. Manipulating insulin levels in the choroid plexus can alter food intake by affecting the hypothalamus, underscoring the intricate relationship between brain insulin and metabolic regulation.

While the role of brain insulin in controlling blood sugar levels remains uncertain, emerging evidence suggests that it may play a crucial role in maintaining brain health, particularly in conditions like Alzheimer’s disease. Studies have shown that boosting brain insulin levels can improve cognitive performance and mitigate the effects of glucose dysregulation in neurodegenerative disorders.

However, the optimal levels of brain insulin and its potential impact on cognitive function are still being investigated. It’s clear that brain insulin production is a complex phenomenon that warrants further exploration to fully understand its implications for human health.

In conclusion, the discovery of brain insulin production challenges our understanding of this essential hormone and its role in regulating various physiological processes. As researchers continue to unravel the mysteries of brain insulin, we can expect new insights that may revolutionize our approach to managing metabolic disorders and cognitive decline.

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