Spirulina vs. Chlorella: Benefits and How to Take Them
Written by: Maria R.
Medically Reviewed by: Erica Palmcrantz, Superfood Nutrition Expert
Updated on: 11/09/2026
In this article:
What is spirulina?
What is chlorella?
What are the benefits of spirulina and chlorella?
Can you take spirulina and chlorella together?
Spirulina and chlorella have become two of the most recognizable green ingredients in powders, smoothies and supplements. They are often placed side by side and may look almost identical, which makes it easy to assume they do the same thing.
But are spirulina and chlorella actually interchangeable? Not quite. Although both are nutrient-rich ingredients, they differ in their color, structure, nutritional composition, and how they are processed. So, what are the benefits of spirulina and chlorella, which one should you choose, and can you take them together? Let’s look at each one.
What is spirulina?
Spirulina is a blue-green microorganism that grows naturally in water and is commonly dried into a powder for use in foods and supplements. Although it is often called a type of algae, spirulina is technically a cyanobacterium. Its distinctive colour comes mainly from chlorophyll and a blue pigment called phycocyanin.¹
What makes spirulina so popular? Its naturally concentrated composition includes protein, amino acids and a variety of pigments and minerals. However, the precise nutritional content can differ depending on how and where the spirulina was grown and processed, as well as how much is included in each serving.
What is chlorella?
Chlorella is a single-celled green microalga that is commonly grown in freshwater. Its rich green colour comes from chlorophyll, and it is usually dried and turned into a powder or tablet. Like spirulina, chlorella naturally contains protein, pigments, and various vitamins and minerals, although the exact amounts depend on how it is grown and processed.²
When comparing spirulina vs. chlorella, one of the main differences is their structure. Chlorella is a true green alga with a firm cell wall, while spirulina is a cyanobacterium with a softer structure. For this reason, chlorella used in wellness products is often processed to break or crack its cell wall and make its contents easier to access during digestion.
What are the benefits of spirulina and chlorella?
The main benefits of spirulina and chlorella come from their concentrated nutritional composition. Both naturally contain protein, amino acids, and colourful plant compounds called pigments. Spirulina is particularly known for phycocyanin and beta-carotene, while chlorella contains chlorophyll and carotenoids such as lutein.¹ ²
Research has also explored whether spirulina and chlorella supplements may support healthy cholesterol, blood pressure and blood sugar levels. Reviews of controlled trials have reported modest improvements in some of these markers, although results vary by dose, length of use, and the people studied.³ ⁴
What about energy, immunity and digestion, you may ask? Spirulina and chlorella’s practical nutritional contribution depends on the amount consumed and the rest of the formula, which is why the full nutrition label matters more than the presence of either name alone.
Can you take spirulina and chlorella together?
Yes, spirulina and chlorella can generally be taken together—many powdered blends contain both. They are also available separately as powders, tablets, and capsules.
If you are new to spirulina or chlorella, introducing them gradually may help you see how your digestive system responds. Product quality also matters, so choose a formula from a trusted manufacturer.
If you can’t choose between either of them and don’t want a cupboard full of products, Herboxa® Super Greens combines spirulina and chlorella with more than 30 other plant-based ingredients in a single daily drink powder. One scoop mixed with water also provides 3.5 g of fibre, five digestive enzymes, five live microorganism strains and 22 vitamins and minerals. Its B vitamins contribute to normal energy-yielding metabolism, while vitamins B6, B12 and D and folate contribute to the normal function of the immune system.⁵
So, which one earns a place in your routine: spirulina or chlorella? The good news is that you do not necessarily have to choose. Each offers a different nutritional profile, and they can be mixed into water, juice, or smoothies, while tablets and capsules can be taken according to their individual instructions.
The real question is not which ingredient sounds more impressive, but what the complete formula provides and how comfortably it fits into your everyday routine.
Want to know more about the digestive side of your routine? Discover why you may feel bloated after eating, or learn how to add more fibre to your diet.
