Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Protein is scientifically validated as an essential macronutrient that can support energy levels, especially in contexts of inadequate caloric or protein intake. Protein itself is not a primary energy source—carbohydrates and fats are the body's preferred fuels—but it plays a critical role in maintaining muscle mass, supporting metabolic processes, and preventing fatigue due to muscle breakdown. During prolonged exercise, caloric restriction, or illness, when carbohydrate and fat stores are low, the body can use protein (via gluconeogenesis) to generate glucose for energy. Clinical studies show that inadequate protein intake can lead to muscle wasting, weakness, and reduced physical performance, all of which can contribute to sensations of low energy. Conversely, adequate protein intake helps preserve lean body mass and supports recovery and stamina, particularly in older adults or athletes. However, for otherwise healthy individuals consuming sufficient calories, increasing protein intake beyond recommended levels does not directly boost energy. Thus, while protein is not an energy-boosting supplement per se, it is crucial for supporting energy indirectly by maintaining muscle and metabolic health. The evidence for its role in treating or preventing energy deficiency linked to protein malnutrition is strong, but its use specifically as a remedy for general “lack of energy” (such as fatigue from non-nutritional causes) is less direct.

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Other health conditions supported by protein

Products containing protein

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