Synopsis

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

Vegetable protein is scientifically validated as a dietary component that can help address a lack of energy, primarily because protein is an essential macronutrient involved in muscle maintenance, metabolic processes, and overall energy homeostasis. When individuals experience fatigue or low energy, inadequate dietary protein can be one contributing factor, especially if their overall diet is unbalanced or insufficient in calories. Studies show that protein intake, including from plant sources such as soy, lentils, beans, and peas, can help maintain lean muscle mass and prevent muscle wasting, which can otherwise contribute to feelings of weakness and fatigue (source).

While carbohydrates are the body's primary energy source, proteins play a supportive role by providing amino acids necessary for the synthesis of enzymes and hormones involved in energy metabolism. Plant-based proteins offer the added benefit of fiber, vitamins, and minerals, which contribute to overall health and potentially reduce tiredness associated with micronutrient deficiencies. Some clinical trials have demonstrated that plant protein supplementation can improve feelings of vitality and reduce fatigue, particularly in populations such as the elderly or those with chronic illnesses who may be at risk for protein deficiency (source).

However, the direct effect of vegetable protein on energy levels (as opposed to addressing protein malnutrition) is moderate, and evidence does not support its use as a stimulant or direct energy booster. Its primary benefit is in the context of addressing dietary insufficiency and supporting overall metabolic health.

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