A study from researchers in the United Kingdom explored how algae-derived proteins might serve as a sustainable source of daily protein for people adopting plant-based diets. The focus centered on spirulina and chlorella, two widely available algae products, and their potential to support amino acid levels in the bloodstream and muscle protein synthesis. The findings were reported in a leading nutrition journal. (citation: Journal of Nutrition)
As veganism grows in popularity, driven by concerns for animal welfare and a shift away from animal products, the search for reliable plant-based protein options becomes more important. British scientists identified spirulina and chlorella as two accessible options that could contribute significantly to daily protein intake. (citation: Journal of Nutrition)
The study enrolled 36 volunteers who were randomly assigned to three groups. Each participant completed a strength exercise routine focused on one leg. After the workout, the first group consumed a beverage containing 25 grams of protein derived from spirulina, while the second group drank an equivalent amount of protein from chlorella. A third group received 25 grams of a plant protein derived from a fungal source, Fusarium graminearum, for comparison. (citation: Journal of Nutrition)
Researchers collected blood samples and muscle tissue from all participants at three time points: before exercise, after the workout, and four hours after protein intake. The analysis tracked amino acid concentrations in the blood and measured the rate of myofibrillar protein synthesis in resting muscles and under exercise-induced stress. The results showed that spirulina increased blood amino acid levels more rapidly than chlorella, while the mycoprotein from the fungal source also supported protein synthesis. All three proteins appeared to promote myofibrillar protein formation in muscle tissue both immediately after training and in a recovery window. (citation: Journal of Nutrition)
The team noted that spirulina’s impact on amino acid availability occurred sooner, which could influence how quickly muscles access building blocks after exercise. Chlorella also contributed to amino acid presence in the bloodstream, though at a slower pace in this study. The fungal protein demonstrated comparable effects on muscle protein synthesis, suggesting that different plant-based proteins can play complementary roles in a balanced post-workout nutrition plan. The researchers plan to broaden the study to include diverse populations, such as older adults, to assess whether age modifies these responses. (citation: Journal of Nutrition)
These findings align with a broader interest in plant-forward nutrition and the ongoing search for sustainable, health-supporting protein sources that can help people meet their fitness and wellness goals without relying on animal products. The researchers emphasized the potential practical applications for athletes, fitness enthusiasts, and individuals seeking environmentally friendly protein options, while acknowledging the need for further research across varied demographics to confirm these preliminary observations. (citation: Journal of Nutrition)
Future work will likely expand the participant pool to examine different ages, activity levels, and dietary backgrounds. Such expanded research could clarify whether spirulina, chlorella, and fungal mycoproteins influence muscle recovery, strength gains, and overall body composition in real-world settings. The current study contributes to a growing body of evidence about how plant-based proteins can support muscle health in the context of regular exercise. (citation: Journal of Nutrition)