Algae protein -- from species like Spirulina and Chlorella -- is among the most sustainable and welfare-neutral protein sources available. Understanding the current state and potential of algae protein helps advocates support high-impact food system transitions.
Algae protein production has essentially no animal welfare concerns at the individual level -- microalgae are single-celled organisms without nervous systems. From a welfare perspective, algae protein is the most clearly welfare-neutral protein source available. Its environmental footprint -- low land use, low water use, potential carbon sequestration -- means it also supports wider wildlife welfare by reducing the habitat and climate impacts of food production. As algae protein technology matures and costs fall, it represents one of the most compelling components of a welfare-positive food system transition.