Last updated: August 11, 2021

Our method

15Products analysed

27Hours spent

14Evaluated articles

87User reviews

You're taken with the freshwater algae chlorella and its detoxifying abilities, but drinking green smoothies is out of the question for you? Good news: Chlorella tablets offer a solid alternative.

You can avoid the typical taste that takes some getting used to. It is also possible to benefit from this miracle weapon of nature via chlorella tablets.

In our chlorella tablets test 2021 we tell you about the criteria you should consider before buying. Chlorella tablets are not a big investment. Nevertheless, there are a few things to consider. Are chlorella tablets the superfood for your body? Find out!




The most important facts

  • Chlorella tablets consist of dried and pressed chlorella algae. Chlorella tablets are available as pressed pellets or in capsule form.
  • The freshwater algae chlorella is microscopic, but its active ingredients have great potential. Chlorella is a popular remedy for detox cures, especially due to its ability to bind toxins to itself and thus remove them from the body.
  • Due to the high content of proteins, vitamin B12 and numerous minerals, chlorella tablets are particularly appealing to fans of the vegan diet. You can counteract possible deficiencies by taking chlorella tablets.

The Best Chlorella Tablets: Our Picks

In the course of our analysis, these three products particularly caught our eye:

Buying and evaluation criteria for chlorella tablets

Our analysis led us to the following factors that you should consider when buying chlorella tablets:

These considerations will help you find the right Chlorella tablets product for you faster:

Dosage form

Chlorella tablets come in two forms. On the one hand, you can get them as pressed pellets. Here the algae is pressed into a tablet. Pressed tablets do not contain any additives.

On the other hand, chlorella tablets are also available as capsules. This form of administration offers you the advantage of swallowing chlorella tablets and avoiding the intense taste of the chlorella algae.

Organic cultivation

To ensure that you are doing something good for your body, please make sure that the chlorella algae is organically grown. The chlorella single-celled organisms bind heavy metals to themselves.

To ensure that you can take your chlorella tablets in an uncontaminated form, we recommend products from organic cultivation. In this case, the water quality of the plantation and other quality standards are controlled.

Chlorella algae are mainly grown in the USA and China. Recently, chlorella has also been cultivated in Germany. While in China and the USA large open-air ponds are usually used for this purpose, in Germany other methods are used.

The cultivation takes place in glass tubes. This way, contamination through air and animals can be excluded.

It is worth taking a closer look at the packaging. The country of origin of the chlorella algae and the reference to organic cultivation show differences in quality.

Packaging

One of the most important properties of chlorella algae is its ability to bind metals to itself. Now this should only happen in the body and not already in the packaging.

Especially when chlorella tablets are offered in the form of pellets, it is important to pay attention to the packaging. Aluminium peel-off foils are considered to be disadvantageous.

So the packaging in glass containers is the best option. Here, too, care should be taken to ensure that the glass is violet. In this way, the chlorella tablets are optimally protected from sunlight.

Compatibility for vegans

The advantages of chlorella come into their own with a vegan diet. Chlorella tablets can be a wise food supplement for this dietary style.

While pressed chorella usually does not contain any additives, chlorella in capsule form usually does not. Capsules often make use of gelatine. However, there are exceptions.

As a vegan, you not only care about the protection of animals, but also about the preservation of the environment? In this context, it makes sense to consider the packaging of your chlorella tablets from the perspective of sustainability.

Containers made from recycled materials support your concerns in contrast to disposable plastic packaging.

Guide: Frequently asked questions about chlorella tablets answered in detail

In this section we would like to look at chlorella from different angles and provide you with helpful information about chlorella tablets:

What is chlorella and how does it work?

Chlorella is a microalgae that is native to freshwater. The single-celled organisms of the Chlorella algae have been living on our planet for over 2 million years.

No other organism has more chlorophyll.

Chlorophyll is also called the blood of plants. It gives the Chlorella algae its green colour. The name Chlorella is made up of the Greek word "chloros" for green and the Latin word "ella" which means "small". A very fitting name.

Chlorella grows 4 times per day.

The chlorella alga impresses with its rapid growth. Within one day, the single-celled organism grows fourfold. This is made possible by a complex of substances contained in the cell nucleus.

These substances are unique and can only be found in chlorella algae. This is why the complex is also called the Chlorella Growth Factor (CGF).

There are 24 species of Chlorella algae. Two of them are used in the field of health and food supplements: Chlorella Vulgaris and Chlorella Sorokiniana. Chlorella Vulgaris is mainly used in the context of food supplements.

Chlorella Tabletten-1

Chlorella algae are freshwater algae. (Image source: Vita Marija Murenaite / unsplash)

This green alga is very well researched. The following areas of effect for the human body are attributed to the chlorella alga(13):

Detoxifying effect

Chlorella seems to have special abilities when it comes to eliminating toxic substances (12). Especially with regard to heavy metals, this property of chlorella is often emphasised. Patients with amalgam tooth fillings are advised to take chlorella tablets to reduce mercury levels in the body.

Chlorella tablets bind heavy metals.

Especially in animal studies it could be proven that chorella binds lead and cadmium and prevents it from being reabsorbed by the body. The liver showed lower levels of the pollutants after administration of chlorella (2).

A study from Korea shows very little change in human levels with chlorella (1). Further studies would be necessary to deepen the analysis (14).

Effect on the immune system

Chlorophyll is a main component of chlorella. This substance has an antioxidant effect (3). This means that it protects the cell walls from attacks by aggressive molecules, also called free radicals. From this perspective, chlorella makes an important contribution to cell health.

In addition, the chlorophyll of the chlorella algae also shows anti-inflammatory effects (4). However, this effect could not be proven in humans for the time being (5).

Effect on hair and skin

The chlorophyll of the chlorella algae is said to be able to slow down the ageing process of cells. The life span of the cells is prolonged. This is good news for skin and hair (7).

The chlorella growth factor is also effective here. It contributes to the cells staying fit longer.

Here, the high proportion of vitamins A and C comes into play, as well as the amino acids glutathione. These act against free radicals and thus support cell growth and blood supply (11).

In 2011, Stiftung Warentest carried out an analysis of algae products in which chlorella products were also examined. The result does not support the health effects.

The main criticism is that it would take an enormous amount of algae products to get anywhere near the amount of vitamins and nutrients that could make a difference (9).

Since algae products such as chlorella tablets are listed as food supplements or even as food, they are not required to provide proof of effect. This is only necessary for medicines.

When and for whom is it useful to take chlorella tablets?

Chlorella tablets are swallowed with water. You can also chew them. However, not everyone likes the taste of chlorella. Chlorella needs fat so that the body can absorb the important nutrients and trace elements. Therefore, it is important to take the chlorella tablets before eating.

Because of the large amount of important vitamins, trace elements and nutrients, taking chlorella can be quite valuable for children. There are chlorella products that have been specially developed for children from the age of 6. The daily dose for children is 30 % to 50 % of the normal daily dose for an adult.

Chlorella Tabletten-2

Especially in vegan diets, the benefits of chlorella tablets can be fully realised.
(Image source: Bekky Bekks / unsplash)

If you are on a vegan diet, we recommend paying more attention to chlorella tablets. Chlorella tablets are a useful addition to a vegan diet and can help you to cover the missing amount of vitamin B12 (6, 9).

Caution is advised if you are taking blood-thinning medication. Due to the high concentration of vitamin K, chlorella is said to inhibit the effect of such drugs.

What parts of the chlorella algae are processed by chlorella tablets?

Chlorella algae are cultivated in fresh water and then harvested. In the next step of processing, the algae are dried in a gentle process and then pressed. All substances of the single-celled organism are used.

The single-celled organism chlorella cannot be seen with the naked eye. Only the microscope allows a glimpse of nature's supposed miracle cure.

The table shows the nutritional values of chlorella tablets:

Chlorella tablet nutritional values per 100 grams
proteins approx. 50 grams
carbohydrates approx. 30 grams
fats approx. 10 grams
dietary fibre approx. 20 grams

The high protein content of chlorella stands out. With about 50 grams of protein per 100 grams, chlorella far exceeds soy, which has about 30 grams of protein per 100 grams.

If we look at chlorella tablets from a health perspective, there is an impressive list of active ingredients (13):

  • Trace elements: Some of the numerous trace elements that chlorella tablets contain are zinc, magnesium, potassium and iron.
  • Vitamins: Chlorella is rich in vitamins B12, B9 and B5, vitamin A, vitamin E, vitamin D and vitamin K, among others.
  • Amino acids: Chlorella has 19 amino acids. Our body needs some of them because it cannot produce them itself.
  • Fatty acids: Chlorella has essential fatty acids, such as linoleic acid, which we cannot produce ourselves, but which are necessary for us.

It is undisputed that chlorella contains a variety of substances that can be of great benefit to the body. The central question is whether our body can absorb and use them (10).

How should chlorella tablets be dosed?

For a healthy adult, it is recommended to take 3 to 4 grams per day. However, if you suffer from nutrient deficiencies and want to replenish the missing depots, you can increase the daily dose to 5 to 10 grams.

The taste of chlorella takes some getting used to. It might help you to start with a lower dose and gradually increase it.

Braunalgen

Chlorella tablets consist of all the components of the dried and pressed algae. (Image source: Martinak/ 123rf)

It is important that you eat some fat when taking the chlorella tablets. This way your body can better absorb the valuable nutrients.

Are you trying to detoxify your body with chlorella tablets? In this case, you should take the chlorella tablets for at least 3 months.

What types of chlorella tablets are there?

Chlorella tablets come in two varieties. You can choose between chlorella tablets with broken cell walls and chlorella tablets without broken cell walls.

Chlorella tablet type characteristics
with broken cell walls cell walls are mechanically broken to facilitate absorption by the body
with intact cell walls untreated form of chlorella that is richer in nutrients and easier to store

Both variants have their advantages and disadvantages, which we analyse in more detail here:

Chlorella tablets with broken cell walls

The cell walls of the chlorella algae are extremely stable. In order to access the valuable substances of the alga, it is necessary to break the cell walls. In these preparations, the cell walls have been broken open mechanically. This should make it easier for the body to absorb the substances.

Chlorella in this form seems to be easier to digest. Fewer digestive complaints have been reported.

Advantages
  • easier to digest
  • active ingredients easier to absorb
Disadvantages
  • fewer active ingredients
  • more expensive

However, this process affects the quality of the nutrients. It also affects the price.

Chlorella tablets with intact cell wall

In this case, the cell walls of the chlorella algae are not processed. Proponents of this form of chlorella believe that the effects of mechanical processing and the heat involved bring too many negative side effects.

Advantages
  • rich in active ingredients
  • better to store
Disadvantages
  • possibly harder to digest

Furthermore, it is reported that the breaking of the cell walls leads to the active substances binding faster and reacting in the air. In this respect, the products can be stored for a shorter period of time.

Both types of chlorella tablets have their fans. Whether the breaking of the cell walls is really necessary is questioned by some experts.

What alternatives are there to chlorella tablets?

Besides chlorella algae, spirulina algae also offers similar benefits for the human body. Strictly speaking, spirulina is not an alga because it does not have a cell nucleus, but a bacterium. Unlike chlorella, spirulina thrives in salt water.

Spirulina algae have an even higher protein value than Chlorella algae. The vitamin B12 content of spirulina algae is higher than that of chlorella algae. However, it seems to be more difficult for the body to utilise it (6, 8).

What are the side effects of chlorella tablets?

Taking chlorella tablets can lead to an initial aggravation. Here, ance and skin rashes have been reported. This seems to be related to the elimination of harmful substances.

In some cases, chlorella tablets have been reported to affect digestion. Taking chlorella tablets caused diarrhoea, constipation or flatulence.

Chlorella tablets have an effect on blood clotting due to their vitamin K content. If you are taking medication to thin your blood, you must take this into account.

Image source: 5second / 123rf

References (14)

1. Lee I, Tran M, Evans-Nguyen T, Stickle D, Kim S, Han J, Park JY, Yang M. Detoxification of chlorella supplement on heterocyclic amines in Korean young adults. Environ Toxicol Pharmacol. 2015 Jan
Source

2. Shim JA, Son YA, Park JM, Kim MK. Effect of Chlorella intake on Cadmium metabolism in rats. Nutr Res Pract. 2009
Source

3. Subramoniam A, Asha VV, Nair SA, Sasidharan SP, Sureshkumar PK, Rajendran KN, Karunagaran D, Ramalingam K. Chlorophyll revisited: anti-inflammatory activities of chlorophyll a and inhibition of expression of TNF-α gene by the same. Inflammation. 2012 Jun
Source

4. Shih MF, Cherng JY. Protective effects of Chlorella-derived peptide against UVC-induced cytotoxicity through inhibition of caspase-3 activity and reduction of the expression of phosphorylated FADD and cleaved PARP-1 in skin fibroblasts. Molecules. 2012 Aug 2
Source

5. Kwak JH, Baek SH, Woo Y, Han JK, Kim BG, Kim OY, Lee JH. Beneficial immunostimulatory effect of short-term Chlorella supplementation: enhancement of natural killer cell activity and early inflammatory response (randomized, double-blinded, placebo-controlled trial). Nutr J. 2012 Jul 31
Source

6. Watanabe F, Takenaka S, Kittaka-Katsura H, Ebara S, Miyamoto E. Characterization and bioavailability of vitamin B12-compounds from edible algae. J Nutr Sci Vitaminol (Tokyo). 2002 Oct
Source

7. Shih MF, Cherng JY. Protective effects of Chlorella-derived peptide against UVC-induced cytotoxicity through inhibition of caspase-3 activity and reduction of the expression of phosphorylated FADD and cleaved PARP-1 in skin fibroblasts. Molecules. 2012 Aug 2
Source

8. Merchant RE, Phillips TW, Udani J. Nutritional Supplementation with Chlorella pyrenoidosa Lowers Serum Methylmalonic Acid in Vegans and Vegetarians with a Suspected Vitamin B₁₂ Deficiency. J Med Food. 2015 Dec
Source

9. Stiftung Warentest: Algenpräparate 2/2011
Source

10. Neumann U, Derwenskus F, Gille A, Louis S, Schmid-Staiger U, Briviba K, Bischoff SC. Bioavailability and Safety of Nutrients from the Microalgae Chlorella vulgaris, Nannochloropsis oceanica and Phaeodactylum tricornutum in C57BL/6 Mice. Nutrients. 2018 Jul 26
Source

11. Sies H. Glutathione and its role in cellular functions. Free Radic Biol Med. 1999 Nov
Source

12. Ranjan R, Kumar N, Gautam A, Kumar Dubey A, Pandey SN, Mallick S. Chlorella sp. modulates the glutathione mediated detoxification and S-adenosylmethionine dependent methyltransferase to counter arsenic toxicity in Oryza sativa L. Ecotoxicol Environ Saf. 2020 Oct 9;208:111418. doi: 10.1016/j.ecoenv.2020
Source

13. Panahi Y, Darvishi B, Jowzi N, Beiraghdar F, Sahebkar A. Chlorella vulgaris: A Multifunctional Dietary Supplement with Diverse Medicinal Properties. Curr Pharm Des. 2016
Source

14. Barkia I, Saari N, Manning SR. Microalgae for High-Value Products Towards Human Health and Nutrition. Mar Drugs. 2019 May 24
Source

Why you can trust me?

Klinische Studie
Lee I, Tran M, Evans-Nguyen T, Stickle D, Kim S, Han J, Park JY, Yang M. Detoxification of chlorella supplement on heterocyclic amines in Korean young adults. Environ Toxicol Pharmacol. 2015 Jan
Go to source
Wissenschaftliche Studie
Shim JA, Son YA, Park JM, Kim MK. Effect of Chlorella intake on Cadmium metabolism in rats. Nutr Res Pract. 2009
Go to source
Wissenschaftliche Studie
Subramoniam A, Asha VV, Nair SA, Sasidharan SP, Sureshkumar PK, Rajendran KN, Karunagaran D, Ramalingam K. Chlorophyll revisited: anti-inflammatory activities of chlorophyll a and inhibition of expression of TNF-α gene by the same. Inflammation. 2012 Jun
Go to source
Wissenschaftliche Studie
Shih MF, Cherng JY. Protective effects of Chlorella-derived peptide against UVC-induced cytotoxicity through inhibition of caspase-3 activity and reduction of the expression of phosphorylated FADD and cleaved PARP-1 in skin fibroblasts. Molecules. 2012 Aug 2
Go to source
Wissenschaftliche Untersuchung
Kwak JH, Baek SH, Woo Y, Han JK, Kim BG, Kim OY, Lee JH. Beneficial immunostimulatory effect of short-term Chlorella supplementation: enhancement of natural killer cell activity and early inflammatory response (randomized, double-blinded, placebo-controlled trial). Nutr J. 2012 Jul 31
Go to source
Wissenschaftliche Untersuchung
Watanabe F, Takenaka S, Kittaka-Katsura H, Ebara S, Miyamoto E. Characterization and bioavailability of vitamin B12-compounds from edible algae. J Nutr Sci Vitaminol (Tokyo). 2002 Oct
Go to source
Wissenschaftliche Untersuchung
Shih MF, Cherng JY. Protective effects of Chlorella-derived peptide against UVC-induced cytotoxicity through inhibition of caspase-3 activity and reduction of the expression of phosphorylated FADD and cleaved PARP-1 in skin fibroblasts. Molecules. 2012 Aug 2
Go to source
Wissenschaftliche Untersuchung
Merchant RE, Phillips TW, Udani J. Nutritional Supplementation with Chlorella pyrenoidosa Lowers Serum Methylmalonic Acid in Vegans and Vegetarians with a Suspected Vitamin B₁₂ Deficiency. J Med Food. 2015 Dec
Go to source
Unabhängige Untersuchung
Stiftung Warentest: Algenpräparate 2/2011
Go to source
Wissenschaftliche Studie
Neumann U, Derwenskus F, Gille A, Louis S, Schmid-Staiger U, Briviba K, Bischoff SC. Bioavailability and Safety of Nutrients from the Microalgae Chlorella vulgaris, Nannochloropsis oceanica and Phaeodactylum tricornutum in C57BL/6 Mice. Nutrients. 2018 Jul 26
Go to source
Wissenschaftliche Untersuchung
Sies H. Glutathione and its role in cellular functions. Free Radic Biol Med. 1999 Nov
Go to source
Wissenschaftliche Studie
Ranjan R, Kumar N, Gautam A, Kumar Dubey A, Pandey SN, Mallick S. Chlorella sp. modulates the glutathione mediated detoxification and S-adenosylmethionine dependent methyltransferase to counter arsenic toxicity in Oryza sativa L. Ecotoxicol Environ Saf. 2020 Oct 9;208:111418. doi: 10.1016/j.ecoenv.2020
Go to source
Wissenschaftliche Untersuchung
Panahi Y, Darvishi B, Jowzi N, Beiraghdar F, Sahebkar A. Chlorella vulgaris: A Multifunctional Dietary Supplement with Diverse Medicinal Properties. Curr Pharm Des. 2016
Go to source
Wissenschaftliche Untersuchung
Barkia I, Saari N, Manning SR. Microalgae for High-Value Products Towards Human Health and Nutrition. Mar Drugs. 2019 May 24
Go to source
Reviews