Benefits of Chlorella

Evidence Based Research Based
Medically reviewed by - Dr. Abdul Khalique, MD Written by - Dr. Shilpa R


What is chlorella?

Chlorella is high in nutrients and is a single-cell algae that has recently gained popularity due to its health advantages. Chlorella takes its name from the Greek word chloros (green) and the Latin word ella (little). It originates from Japan and Taiwan. Because of its excellent nutritional profile, some people refer to Chlorella as a superfood. This article highlights Chlorella’s health advantages, nutritional value, adverse effects, risks, and interactions with other drugs.

Chlorella is high in nutrients and is a single-cell algae that has recently gained popularity due to its health advantages.

Key Facts

  • Dr. Martinus Willem Beijerinck, a well-known microbiologist and botanist, first mentioned Chlorella vulgaris in 1890. 1Overview| Researched based study from
  • Chlorella is a genus of around 13 species of green algae.
  • Their cell wall is rigid, leaving them harder to digest if not processed.1Overview| Researched based study from
  • The FDA has declared Chlorella “generally recognized as safe” 2Overview| Researched based study from .
  • They are commercially grown for food and as a supplement for its various compounds.
  • Chlorella vulgaris and Chlorella pyrenoidosa are grown as commercially available sources for dietary supplements using large-scale farming methods.

Nutritional value

What nutrients are in chlorella?

Chlorella has multiple valuable components, which may include the following:


  • Protein – includes a high concentration of protein, roughly 59 percent dry weight, which is more than soybeans, which have around 33 percent dry weight.1Nutritional value| Researched based study from ,3Nutritional value| Researched based study from )
  • Amino acids – like all essential amino acids for humans, including leucine, isoleucine, lysine, phenylalanine, methionine, threonine, valine, tryptophan, and histidine are present in these products.
  • Fiber – chlorella, when consumed in large quantities, can be a rich source of fiber.
  • Fats include linolenic acid and linoleic acid, but not arachidonic acid, eicosapentaenoic acid, or docosahexaenoic acid.



Chlorella products include all of the vitamins that humans require 1Nutritional value| Researched based study from

  • Vitamin B1
  • Vitamin B12
  • Vitamin 6
  • Vitamin B2
  • Folate
  • Biotin
  • Niacin
  • Pantothenic acid
  • Vitamin D2
  • Vitamin C
  • Vitamin E
  • Vitamin K
  • α- and β-carotenes.


  • Iron
  • Potassium
  • Copper
  • Magnesium
  • Calcium
  • Zinc

Other antioxidants

  • Chlorophyll
  • Lycopene
  • Lutein


Recommended dosage of chlorella

  • Chlorella comes in capsules, pellets, tablets, capsules, powder, and extract.4Dosage| Researched based study from
  • There are no universal recommendations for chlorella microalgae dosage.
  • The recommended intake of most supplements is 2-3 grams.
  • Adults have typically taken 3-10 grams of Chlorella orally daily for 2-3 months.
  • Start with a lower dose of Chlorella each day and progressively raise the dosage once you handle it well.
  • Individual dosage may vary, therefore visit a physician to find the appropriate dosage for you.

Health benefits

Health benefits of Chlorella.

Health benefits of chlorella

Chlorella is said to have the following health benefits

Help with vitamin D2 and B12 deficiency

  • Chlorella products include significant quantities of vitamins D2 and B12 and may be helpful for vegetarians who are deficient in these vitamins.1Health benefits| Researched based study from

Prevents anemia

  • Chlorella products include high levels of iron, vitamin B12, and folate, which minimizes the risk of anemia even in pregnant women.5Health benefits| Researched based study from

Prevents high blood pressure

  • Their high potassium level helps people avoid hypertension. Furthermore, GABA-rich chlorella dramatically reduced high blood pressure in humans 6Health benefits| Researched based study from

Maintains blood cholesterol

  • As Chlorella contains carotenoids, fiber, niacin, and other antioxidants, it may help decrease blood cholesterol in persons who have a mild cholesterol level increase.7Health benefits| Researched based study from

Lowers blood sugar

  • Chlorella can control blood sugar levels.8Health benefits| Researched based study from

Treats Nonalcoholic fatty liver disease (NAFLD)

  • As Chlorella could improve an individual’s blood sugar and lipid profile, they could be used as a supplemental treatment for NAFLD 9Health benefits| Researched based study from

Acts against oxidative stress

  • The antioxidant properties of Chlorella can protect people against oxidative stress and help prevent chronic diseases such as heart disease, cancer, and chronic obstructive pulmonary disease8Health benefits| Researched based study from

Detoxification of the body

  • In different studies, chlorella supplementation has been proven to detoxify the body from hazardous pollutants like dioxin 10Health benefits| Researched based study from and other heavy metals like mercury, tin, silver, and lead levels in individuals.11Health benefits| Researched based study from

Enhance immunity

  • In several trials, short-term chlorella supplementation has shown a rise in various immune markers in the body 12Health benefits| Researched based study from and saliva13Health benefits| Researched based study from

May improve training endurance

  • People who took chlorella supplements had a higher maximum oxygen intake, indicating that Chlorella may assist in enhancing endurance during aerobic exercise capacity14Health benefits| Researched based study from

May prevent cancer

  • Chlorella has been shown to have specific qualities that can help prevent cancers such as human colon cancer 15Health benefits| Researched based study from However, more research is required.

Side effects

Does chlorella have any side effects ?

It is generally safe, but few common side effects of Chlorella may include:

  • Nausea.
  • Gas.
  • Diarrhea.
  • Green stools.
  • Stomach cramping.
  • Sensitivity to sunlight.



  • People taking chlorella supplements should wear sunscreen while going outdoors as they can make the skin more sensitive to sunlight.
  • Breastfeeding mothers – should avoid using it as there is insufficient credible information to determine whether Chlorella is safe to use while breastfeeding.
  • People allergic to mold should be cautious as they could get an allergic reaction to Chlorella.
  • People allergic to iodine should stay away from Chlorella as it may contain iodine.
  • People with a weaker immune system should stay away from the product as it may promote the growth of unwanted bacteria in the intestines.
  • Remember that chlorella products can differ based on how the Chlorella was grown, collected, and processed.
  • Always look for a quality assurance seal when buying a chlorella supplement to ensure safety.



The following medications may interact with Chlorella:


  • Chlorella includes a significant amount of vitamin K, which the body uses for blood clotting. Warfarin is a drug given to prevent blood from clotting. When taken together, Chlorella may reduce the effects of warfarin16Interactions| Researched based study from

Photosensitizing drugs

  • Chlorella may increase skin sensitivity to sunlight. When combined with other photosensitive, it may increase the risk of blistering, sunburn, or rashes when exposed to sunlight17Interactions| Researched based study from

Bottom line

The bottom line

Although Chlorella is an excellent source of antioxidants, vitamins, and minerals, it is essential to check with a doctor before using it as a dietary supplement for any health concerns. Also, an individual must inform the doctor about their medications, including prescription and non-prescription drugs, as taking them together may produce unwanted effects. Although some researchers suggest it can improve health and well-being, more human studies are required to support these claims.

Disclaimer: The user acknowledges that this article's information is being offered for informational purposes only. Every attempt has been made to guarantee that the article is informational and correct. If they have any doubts or questions about their health, we firmly advise our readers to visit a doctor or other healthcare professional.

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