Sustainable Spirulina Breakthrough: A Carbon-Neutral Alternative for Vitamin B12
- Researchers have developed a method to produce biologically active vitamin B12 using a modified growth process for Spirulina, creating a carbon-neutral alternative to animal-based nutrients.
- Asaf Tzachor of Reichman University, in collaboration with teams from Austria, Denmark, and Iceland.
- Traditional Spirulina is often marketed as a nutrient-dense supplement, but it primarily contains pseudo-vitamin B12, also known as cobamide.
Researchers have developed a method to produce biologically active vitamin B12 using a modified growth process for Spirulina, creating a carbon-neutral alternative to animal-based nutrients. According to a study published in Discover Food, this photosynthetically controlled Spirulina contains active B12 levels comparable to beef, providing a potential sustainable solution for the more than one billion people worldwide suffering from B12 deficiency.
The research was led by Dr. Asaf Tzachor of Reichman University, in collaboration with teams from Austria, Denmark, and Iceland. The team utilized a biotechnology system developed by VAXA Technologies in Iceland to overcome a long-standing nutritional limitation of blue-green algae.
Traditional Spirulina is often marketed as a nutrient-dense supplement, but it primarily contains pseudo-vitamin B12, also known as cobamide. This pseudo-form is not bioavailable to humans and cannot resolve a vitamin B12 deficiency.
The new process uses enclosed photobioreactors and artificial light to manage the algae’s metabolism. By fine-tuning these light conditions, the researchers produced Spirulina where more than 98% of the measured B12 was in its active, usable form. This was achieved without genetic modification, according to the study.
Comparing B12 Levels in Spirulina and Beef
The study found that the photosynthetically controlled Spirulina (PCS) produces active vitamin B12 at concentrations that meet or exceed those found in beef. The PCS contained 1.64 µg of active B12 per 100g, while beef typically contains between 0.7 and 1.5 μg per 100g.
This finding is significant because the recommended dietary allowance for vitamin B12 is 2.4 µg per day. While beef and dairy are standard sources for meeting this requirement, the researchers note that ruminant agriculture contributes to high greenhouse gas emissions, deforestation, and heavy water and land use.
By producing the vitamin through carbon-neutral biomass, the researchers aim to decouple essential micronutrient production from the environmental costs of animal agriculture.
Public Health Impact of Vitamin B12 Deficiency
Vitamin B12 is essential for the formation of red blood cells, nerve function, and DNA production. Severe deficiencies can lead to memory issues, nerve damage, anemia, and developmental problems in infants.
Because B12 is naturally found almost exclusively in animal products, people following plant-based diets or those in regions with limited access to meat and dairy are at higher risk. The ability to produce bioavailable B12 in a plant-based, sustainable medium addresses a primary gap in global sustainable nutrition.
Beyond B12, the researchers noted that this controlled growth system enhances other bioactive compounds in the algae, including those with immune-boosting, anti-inflammatory, and antioxidant properties.
Production Scale and Global Application
The research team explored how scaling this technology could impact public health on a larger scale. If Iceland reallocated electricity from heavy industry to these photobioreactors, the country could produce 277,950 tonnes of Spirulina biomass annually.
This production level would yield approximately 4555 grams of active vitamin B12 per year. The researchers estimate this amount would be enough to meet the recommended dietary allowance for over 13.8 million children between the ages of 1 and 3.
the findings demonstrate that photosynthetically controlled Spirulina can produce desirable levels of active vitamin B12, offering a sustainable alternative to traditional animal-source foods.
Dr. Asaf Tzachor
The resulting biomass can be harvested and processed into tablets or powder for use as a nutritional additive in various foods and drinks.