Both chlorella and spirulina are algae that grow in water, but there are differences. Chlorella is a freshwater alga, while spirulina is a blue-green saltwater alga (cyanobacterium). An important characteristic of chlorella is its sturdy cell wall. Chlorella and spirulina both contain a high percentage of protein and are rich in various vitamins and minerals. An example of a 100% pure source of chlorella is Plantforce Clean Chlorella, available as chlorella tablets.

Chlorella is rich in plant-based protein, making it an excellent choice for vegans looking for a source of vegan protein. Chlorella also contains chlorophyll, which gives it its characteristic green colour. Additionally, this algae is rich in B vitamins, including B12, and minerals such as iron, zinc, and magnesium. Plantforce Clean Chlorella offers a supplement consisting of 100% pure freshwater chlorella grown in enclosed biotanks in the Netherlands. It is available in tablet form and can easily be used as a supplement to a plant-based diet.