Skip to main content

4 Benefits Of Chlorella For Your Health

4 Benefits Of Chlorella For Your Health
Claire Muszalski
Registered Dietitian4 years ago
View Claire Muszalski's profile

Next time you're making your morning smoothie, think about mixing in a bit of algae.

You probably heard of spirulina - chlorella is another green algae, that's packed with nutrition and health benefits.

So, before you go scraping it off your local pond, you need to find our how this super supplement could benefit you.


What is Chlorella?

Chlorella is a single-celled green algae — a water-based plant, packed with nutritional value. It has survived various intense conditions to make itself one of the longest surviving species on Earth.1

While eating algae isn’t appealing to most people, algae-based supplements have gained a fan base because of their incredible nutritional properties.



Green smoothie bowl with chlorella


What does it do?

Chlorella is a water-based “plant”, or green algae, that is a cornerstone of the aquatic food chain. It uses sunlight and carbon dioxide to produce a great deal of oxygen to help other plants and animals thrive.2

For years, many cultures have used chlorella as a food source and for its health benefits. Because it’s a plant with cell walls that humans can’t digest,  we have to take it as a supplement to make sure we get any benefits.

Definitely more appealing that drinking pond water...


What are the Health Benefits of Chlorella?

1. Nutritional powerhouse

Chlorella is packed with protein along with chlorophyll, fibre, vitamins, and minerals. More than half of its contents is protein, but it also contains other health-boosting nutrients like vitamin C, vitamin B6, iron, and healthy fats.

  • Chlorophyll

Chlorella is an impressive source of chlorophyll, a powerful plant pigment with many health benefits. Chlorophyll can keep our red blood cells healthy, help to heal wounds, and improve blood sugar control.1

  • Protein

Chlorella is composed of up to 60% protein, making it three times higher in protein concentration than beef.1

Most chlorella extracts contain up to 16g of protein per ounce, with a wide range of essential and nonessential amino acids, making it an excellent plant-based protein source3.

  • Iron and Vitamin C

Chlorella is a great plant-based source of iron that’s suitable for vegetarians and meat eaters alike.

The exact amount varies depending on the type of supplement, but most plant-based iron sources aren’t easily absorbed. In combination with the vitamin C in chlorella, the iron can have a greater impact through better absorption.

  • Vitamin B6

Chlorella is a great source of several B vitamins, including vitamin B6. B6 is used for many metabolic functions and immunity.

  • Vitamin B9

Chlorella supplements are also a source of vitamin B9, or folic acid. It plays a role in DNA formation and cell division during growth and development.4

  • Omega-3s

Omega-3 fatty acids are the heart-healthy unsaturated fats that can have many health benefits, and they’re present in chlorella.

These types of fats, found in plant sources, can help fight inflammation and other chronic health issues. They can help increase good cholesterol and decrease bad cholesterol.


2. May Boost your Immune System

In addition to being a good source of vitamin C and other vitamins that help to boost immunity, chlorella supplements have also been proven to have powerful antioxidant properties.2

Oxidative damage to our body’s cells is to blame for many disease states and illnesses, making antioxidant foods and supplements crucial for sustaining good health long term. Chlorella supplements have even been linked with speeding up wound healing.1

In addition to being a good source of antioxidants, other research has shown that chlorella can also have anti-inflammatory properties, which is another way to prevent health issues.2


3. May Improve Cholesterol and Blood Pressure

Because chlorella is a good source of heart healthy omega-3 fats and fibre, it can help improve cholesterol.

Its other properties of anti-inflammation and anti-oxidation can also help to prevent the damage that high cholesterol can cause to your heart circulatory system.

Chlorella has specifically been shown to help reduce LDL, or low-density lipoprotein (bad cholesterol) levels and have a positive impact on blood pressure.1


Hands holding green algae


Does Chlorella have any possible side effects?

Chlorella and other algae species are classified as food sources by the Centre for Food Safety and Applied Nutrition and are “generally regarded as safe”.1

This classification means that, although there may be negative side effects in large doses, healthy individuals shouldn’t see any harm in reasonable amounts, so add that extra scoop to your smoothie.1

The side effects of chlorella in research have been mild and are usually related to digestive issues.2

Other potential risks are the fact that the content of chlorella supplements vary greatly depending on the species, growing conditions, and how they are processed.

Because of its potential benefits in treating other health conditions, and like all nutritional supplements, it might interact with other medications. The impact of chlorella on the immune system is unique and could be potentially harmful for anyone with a suppressed immune system.

If you’re concerned, it’s best to speak with your doctor before beginning any supplement routine.


How should you take Chlorella? Dosage and Frequency

When it comes to taking Chlorella, it depends on how you’d like to incorporate it in to your diet.

Chlorella supplements are available in both powder- and pill forms. If you prefer taking pills, the tablets would be appropriate, but the powder makes a simple addition to a smoothie or vegetable soup.

The fact that the processing of Chlorella varies so greatly means there’s no simple dosage that is recommended.

Follow the guidelines of the supplier and speak with your doctor or pharmacist if you need help deciding the right dosage for you.


Take Home Message

If you’re looking for a mean, green supplement that’s packed with all the good stuff, then chlorella could be the one for you.

From a high-protein content to being packed with vitamins, there’s plenty that this ancient, green algae can do for your supplement routine.

Our articles should be used for informational and educational purposes only and are not intended to be taken as medical advice. If you're concerned, consult a health professional before taking dietary supplements or introducing any major changes to your diet.

1. Rani, K., Sandal, N., & Sahoo, P. K. (2018). A comprehensive review on chlorella-its composition, health benefits, market and regulatory scenario. Pharma Innov. J.7, 584-589

2. Panahi, Y., Darvishi, B., Jowzi, N., Beiraghdar, F., & Sahebkar, A. (2016). Chlorella vulgaris: a multifunctional dietary supplement with diverse medicinal properties. Current pharmaceutical design22(2), 164-173.

3. Office of Dietary Supplements. (2016, February 17). National Institutes of Health Office of Dietary Supplements – Vitamin B6. Retrieved from

4. Office of Dietary Supplements. (2018, December 7). National Institutes of Health Office of Dietary Supplements – Folate. Retrieved from

Claire Muszalski
Registered Dietitian
View Claire Muszalski's profile

Claire is a Registered Dietitian through the Academy of Nutrition and Dietetics and a board-certified Health and Wellness Coach through the International Consortium for Health and Wellness Coaching. She has a Bachelor of Science in Biology and a Master’s degree in Clinical Dietetics and Nutrition from the University of Pittsburgh.

Talking and writing about food and fitness is at the heart of Claire’s ethos as she loves to use her experience to help others meet their health and wellness goals.

Claire is also a certified indoor cycling instructor and loves the mental and physical boost she gets from regular runs and yoga classes. When she’s not keeping fit herself, she’s cheering on her hometown’s sports teams in Pittsburgh, or cooking for her family in the kitchen.

Find out more about Claire’s experience here.