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 naturally contains a lot of plant protein, which makes it interesting for vegans looking for variety in their protein sources. Chlorella also contains chlorophyll, which gives the alga its characteristic green colour. In addition, chlorella naturally contains B vitamins and minerals such as iron, zinc and magnesium; the levels differ per product, so check the label. Plantforce Clean Chlorella is 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 an addition to a plant-based diet.