When it comes to space missions, nutrition is more than just food—it’s survival. That’s why NASA has extensively studied spirulina, the microscopic blue-green algae, and officially recommended it as a superfood for astronauts. Here is why NASA recommend spirulina, and what makes it so special.
“The cyanobacteria Arthrospira platensis NIES-39, commonly known as spirulina, could provide a fresh supply of nutrients for crew on long-duration spaceflight missions. Spirulina is a readily digestible food that is high in protein with all essential amino acids as well as significant levels of B vitamins, antioxidants, and anti-inflammatory metabolites…” (Fisher, Broddrick and Settles, 2023)
NASA and the Search for Superfoods
NASA constantly looks for foods that are lightweight, nutritious, and easy to store. In space, every ounce counts, and astronauts need a compact food source that provides maximum nutrition. Spirulina checks all those boxes, making it a top choice for long-term space travel.
What is Spirulina?
A Brief History of Spirulina
Spirulina has been consumed for centuries by ancient civilisations, such as the Aztecs. They harvested it from lakes and used it as a primary source of protein.
Spirulina as a Nutrient-Dense Algae
Unlike many plant foods, spirulina is a complete protein source, containing all essential amino acids. It’s rich in vitamins, minerals, and antioxidants, making it one of the most nutrient-dense foods on Earth (Fresh Spirulina, What is spirulina good for?, 2025 ).
Why NASA Chose Spirulina for Space Missions
Compact and Lightweight Superfood
Spirulina is dry, light, and requires minimal storage space—a must-have in spacecraft.
High Protein Content for Astronauts
It provides up to 70% protein by weight, significantly higher than that of meat or soybeans, which helps astronauts maintain muscle in zero gravity.
Long Shelf Life and Easy Storage
Unlike fresh produce, spirulina can last months to years without spoiling, making it ideal for long journeys.
Sustainable and Quick Growth Cycle
Spirulina grows rapidly in small amounts of water, making it a sustainable food source that could even be cultivated in space habitats.
Nutritional Benefits of Spirulina
- Protein & Amino Acids: Supports muscle repair and energy.
- Vitamins & Minerals: Rich in B vitamins, iron, calcium, and magnesium.
- Antioxidants: Protect against cell damage from cosmic radiation.
- Immune Boost: Enhances white blood cell activity, promoting overall health in astronauts.
Health Benefits for Humans on Earth
Spirulina isn’t just for astronauts—it benefits everyone:
- Energy & Endurance: Athletes use it for stamina.
- Detoxifying Metals: Helps remove toxins like arsenic.
- Blood Sugar & Cholesterol: Supports heart health and glucose control.
Spirulina vs. Other Superfoods
- Spirulina vs. Chlorella: Spirulina has more protein, and chlorella has more chlorophyll.
- Spirulina vs. Soy Protein: Spirulina is more bioavailable than soy protein in terms of digestibility.
- Spirulina vs. Whey Protein: Spirulina is a vegan-friendly option that is easier on the digestive system.
How NASA’s Research Influenced Global Health Trends
NASA’s studies popularised spirulina, leading to its rise in supplements, smoothies, and functional foods worldwide. Today, spirulina is found in energy bars, powders, and even skincare products.
How to Consume Spirulina Safely
- Recommended Dosage: 2–3 grams per day for beginners, up to 10 grams for athletes. Some take even more in its raw form.
- Forms: Available as Fresh Spirulina pure powder, capsules, tablets, or blended in smoothies.
- Side Effects: Generally safe, but some may experience mild digestive discomfort.
FAQs About NASA and Spirulina
Q1: Why does NASA recommend spirulina for astronauts?
Because it’s compact, protein-rich, and provides complete nutrition.
Q2: Is spirulina safe for daily use?
Yes, when taken in recommended doses, it’s safe and beneficial.
Q3: Can spirulina replace a full meal?
No, it’s a supplement—not a replacement for whole meals.
Q4: Does spirulina help with energy?
Yes, it’s protein, iron, and B vitamins that naturally boost energy.
Q5: How long can spirulina last in storage?
Properly sealed, it can last 2–3 years.
Q6: Is spirulina a vegan and sustainable option?
Yes, it’s 100% plant-based and eco-friendly.
Spirulina as the Future of Nutrition
NASA’s endorsement of spirulina isn’t just about space—it’s about survival and maximising human potential with minimal resources. Whether you’re an astronaut in orbit or someone seeking to enhance your health on Earth, spirulina is one of the most potent superfoods available today.
Bibliography
Fisher, K.E., Broddrick, J.T. and Settles, A.M. (2023). Space Algae-2: Preflight Testing for A Long-Duration, Multi-Omics Analysis of Arthrospira Platensis. [online] Nasa.gov. Available at: https://ntrs.nasa.gov/citations/20230008532.
