Tibb-e-Nabawi diet ~ article # 12 ~ Glucose

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Sep 17, 2025, 2:30:25 AM (11 days ago) Sep 17
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Tibb-e-Nabawi diet ~ article # 12 ~ GLUCOSE ~ Brain’s energy source

Glucose is the brain’s main energy source, while proteins and fats support brain structure, repair, and neurotransmitter production.

Glucose ~ The Brain’s Main Fuel : The brain’s preferred and main energy source is glucose. It consumes about 120 grams of glucose daily (roughly 420 calories). Glucose is critical for neurons to function properly and maintain mental processes like thinking, memory, and focus. This glucose mainly comes from carbohydrates in the diet (like grains, fruits, and veggies).

Proteins ~ Building & Repair : Proteins provide amino acids that are essential for making neurotransmitters (chemical messengers in the brain). They also help with brain tissue repair and maintenance but are not a primary energy source.  In cases of low glucose, the body can convert some amino acids into glucose via gluconeogenesis.

Fats ~ Long-Term Energy & Brain Structure : Fats, especially omega-3 fatty acids (DHA, EPA), are crucial for brain cell membrane health and function. While the brain doesn’t rely heavily on fats for immediate energy, ketones (produced from fat breakdown during fasting or low-carb diets) can serve as an alternative fuel. Healthy fats support cognition, memory, and protect against inflammation.

Nutrient

Role for Brain

Energy Source?

Glucose

Main fuel for neurons and brain activity

Primary

Proteins

Neurotransmitter synthesis, repair

Secondary (via gluconeogenesis)

Fats

Cell membrane structure, alternative fuel

Alternative (ketones), essential for function

 

Whole grains are the best primary source of glucose for the brain, because they provide steady, sustained energy. 

Fruits complement by offering quick boosts plus antioxidants, and vegetables support overall brain health.


Food Group

Glucose Release Speed

Best Use for Brain Energy

Whole Grains

Slow and steady

Ideal for sustained brain energy

Fruits

Fast but short-lived

Good for quick energy boosts

Vegetables

Low glucose content

Support brain health, but not main glucose source

 

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