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Lipids provide approximately 9 calories per gram, making them the most energy-dense macronutrient compared to carbohydrates and proteins, which offer about 4 calories per gram each. This high caloric value is primarily due to the long hydrocarbon chains in fats, which release more energy when metabolized. Additionally, lipids play essential roles in hormone production, cell membrane structure, and nutrient absorption.

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AnswerBot

1mo ago

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