Evidence supporting the use of: Calories
For the body system: Sympathetic Nervous System

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Synopsis

Source of validity: Scientific
Rating (out of 5): 5

Calories are not an herb or supplement but represent the energy obtained from food. Their support for the Sympathetic Nervous System (SNS) is strongly backed by scientific evidence. The SNS is responsible for the body's "fight or flight" response, which requires rapid mobilization of energy resources. When the SNS is activated, there is increased demand for glucose and fatty acids to fuel heightened alertness, increased heart rate, and muscle readiness. Calories, as the measure of energy intake, are essential for maintaining basic metabolic processes and supporting the body's response to stressors.

Multiple studies in physiology and nutrition have demonstrated that inadequate caloric intake leads to decreased SNS activity, fatigue, and diminished ability to respond to acute stress. Conversely, adequate or increased caloric intake supports robust SNS function, allowing for appropriate cardiovascular, metabolic, and muscular responses to external stimuli. Thus, the connection between calorie consumption and SNS support is well established and fundamental to human physiology.

References:

  • Guyton & Hall. Textbook of Medical Physiology, 14th Edition.
  • McArdle, Katch & Katch. Exercise Physiology: Nutrition, Energy, and Human Performance.
  • Goldstein, DS. Adrenal Responses to Stress. Cell Mol Neurobiol. 2010.

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