Solein may sound like science fiction but it could become a nutrition staple. Maybe.

Air protein may sound like Michael Jordan’s latest product, but it is actually a promising new source of muscle-building fuel that might be a game changer. And, far from being science fiction, the chemical Solein is gaining popularity. Here is what you need to know.
WHAT IS AIR PROTEIN?
Air protein, marketed under the brand Solein, is described as a “natural protein for every food imaginable.” It is neither derived from animals nor plants, yet it can be added to foods to increase their protein content. The creators claim Solein is gluten-free, vegan, and suitable for all religions. Its nutritional profile is touted as balanced, providing all nine essential amino acids, iron, minerals typically difficult to obtain from fully plant-based diets, and unsaturated fatty acids aiming to mimic the benefits of plant-based eating.
HOW IS AIR PROTEIN MADE?
Solein was launched in 2021 by Solar Foods, which built a dedicated factory called ‘Factory 01.’ The manufacturing process employs gas fermentation similar to beer brewing. However, instead of using sugars that are converted to alcohol, it utilizes carbon dioxide from air as the feedstock – hence being dubbed “air protein.” A natural, unmodified single-celled organism is grown through this process and turned into a powdered protein that can be incorporated into various foods and beverages.
IS AIR PROTEIN A SUSTAINABLE CHOICE?
The organism producing Solein feeds on minerals, carbon dioxide, nitrogen and hydrogen derived from splitting water molecules in air. The resulting microorganism is positioned as an edible, marketable product with strong sustainability potential by providing animal-based nutritional benefits without requiring livestock. Safety research on Solein as a food product is ongoing, though producing hydrogen is noted as an explosive risk factor. Manufacturers argue Solein’s production emits less greenhouse gas than conventional animal or plant-based protein sources. They state a “revolution” is needed in how protein is produced and consumed to sustain global demand while preserving ecosystems.
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