Evidence supporting the use of: Spirulina
For the health condition: Energy (lack of)

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Synopsis

Source of validity: Scientific
Rating (out of 5): 2

Spirulina is a blue-green algae that has gained popularity as a dietary supplement, particularly for its purported ability to boost energy levels. The scientific rationale behind this claim lies in spirulina's rich nutrient profile. It contains high levels of protein (up to 60-70% by dry weight), essential amino acids, B-vitamins (especially B12, though the form present may not be bioavailable for humans), iron, and antioxidants. These nutrients are vital for overall health and metabolic processes that can influence energy production.

Several small-scale human studies and animal research have explored spirulina’s effects on physical performance and fatigue. For example, a study published in Medicine & Science in Sports & Exercise (2010) found that supplementation with spirulina improved exercise endurance and reduced muscle damage in moderately trained men. Other studies have shown modest improvements in feelings of fatigue, particularly in individuals with anemia or chronic fatigue, possibly due to spirulina’s iron content.

However, the body of evidence supporting spirulina’s use specifically for boosting energy in healthy individuals is limited and generally of low quality. Most studies have small sample sizes, and results are mixed. While its nutritional content theoretically supports metabolic energy, direct effects on subjective energy levels or fatigue require further research. Thus, while scientific rationale exists, the evidence is not robust, warranting a moderate rating.

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