How Stress Triggers Craving for Carbs Than Fats Explained in Brain Study

There’s a mechanism that makes the switch in the brain from a preference for fats to an increased appetite for carbohydrates.

The lack of control to munch on a pack of potato chips or a hot bowl of mac and cheese may not be your fault.

A neuron in the brain stimulates food preferences in a person. Moreover, carbohydrate craving is often induced by stressful life events and mood disturbances. However, the mechanism responsible for selection between a high-carbohydrate diet (HCD) and a high-fat diet (HFD) remains unknown.

High Fat Diet and Gut Microbes During Pregnancy and Lactation Contribute Childhood Obesity
E. coli bacteria in the maternal diet during last 2 weeks of pregnancy and lactation can affect body weight and fat deposition in the offspring.

‘During stress, corticotropin-releasing hormone (CRH)–positive neurons in the hypothalamus stimulates dietary preference for carbohydrate over fat.’

An international team of researchers centered at the National Institute for Physiological Sciences (NIPS) has identified that activation of a subset of corticotropin-releasing hormone (CRH)–positive neurons in the paraventricular hypothalamus (PVH) is sufficient and necessary to induce dietary preference for carbohydrate over fat.

The preference to have a certain type of food greatly depends on its taste, texture or in other words, the palatability. However, food selection is also influenced by nutritional state as well as food palatability.

The exact mechanism responsible for these cravings has been a mystery. But these scientists believe it is tied to one specific type of neuron in the hypothalamus. When they activated these neurons in mice, the rodents’ taste preferences veered away from high-fat foods and instead steered towards carbs.

High Fat Diet Destroys Arteries Early
High fat diet can destroy arteries earlier than expected. It is also one of the primary causative factors of high blood pressure (BP).

The carb-craving neuron gets set off by a hormone released during times of stress, which could explain phenomena like stress eating and the appeal of comfort food. When you start to feel on edge, your brain triggers carb cravings as part of your stress response: Bring on the baked goods.

“Many people who eat sweets too much when stressed tend to blame themselves for being unable to control their impulses,” Professor Yasuhiko Minokoshi, lead author of the study, told the Japan Times. However, the study points out that the lack of control for carbs lies in the brain.

Vitamin D Improves Metabolic Syndrome
High-fat diet in combination with vitamin D deficiency cause metabolic syndrome.

Corresponding author Yasuhiko Minokoshi says, “This study will contribute to the better understanding of the molecular mechanisms underlying the effects of stress and obesity on food selection behavior”.

Source-Medindia

Giving Up Fatty Foods Could Send Dieters on a Downward Spiral
People on a high-fat diet experience changes in the brain which can bring about a cycle of poor dieting and depression.