• General recommendations
  • Recommendations

Chlorella Usage Recommendations and Contraindications

Chlorella is not a drug, and it is not included in the pharmacopoeia of Western medicine. However, there is an abundance of scientific articles and publications that describe chlorella’s effects. Pharmaceutical labs are even working to extract the active components of chlorella to enrich their own medicines.

80% of new consumers of chlorella notice its positive effects within a month, so there is no doubt that chlorella can be beneficial to your health.

Chlorella is a powerful heavy metals and PCBs magnet, it is therefore very important to select a high quality chlorella that has not been in contact with pollutants, such as a organic chlorella, grown in glass tubes.


Dosages and usage recommendations : how to take chlorella ?

Chlorella can benefit nearly anyone, but there is no universal recipe for its use. We are all complex beings with many commonalities, but we are also individuals with our own unique characteristics and backgrounds. Factors such as absorption rates, disposal capabilities, physiological reactions, and levels of pollutants in the body are all specific to each individual.

These usage recommendations serve only to guide your first doses of chlorella. They provide information about average doses and treatments and should therefore be read for informational purposes only. It is important to make adjustments and find the dose that is right for you, according to your own unique needs. Moreover, do not forget that our needs can change over time, depending on the season, stress levels, fatigue, or other varying factors.

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Some people choose to take chlorella for 3-4 months twice a year while others prefer to take their supplements year-round. Similarly, some people take 10 chlorella tablets (300mg) a day while others take 30 tablets. It is up to each individual to adjust the dosage to his or her own needs.

Please note that no case of an overdose of chlorella has ever been reported.

To find the right dosage for you, pay close attention to your body’s reactions and how you feel overall.

Important things and false rumors to know about chlorella ➤ The 7 Lies about Chlorella


Recommended dosage for adults

Chlorella Glass Tubes
Ultra pure organic chlorella eChlorial cultivated in glass tubes

Consumer experiences have shown that a daily dose of 2-5 grams of chlorella (or 10-15 300 mg chlorella tablets) has significant positive effects on quality of life. Doctors and nutritionists also suggest taking 3-5 grams or 10-15 tablets every day to prevent health complications and illnesses.

Recommended dosage for children

Powdered chlorella (or crushed chlorella tablets) can be given to children. Doses should be adjusted to the weight of the child in proportion to the recommendations for adults. For example, a child weighing 20 kg should take around 1 gram of chlorella or 3 crushed chlorella tablets.

When to take chlorella ?

Take chlorella at least one hour before or after taking any other medications (such as birth control pills). Ideally, take chlorella in the morning and other pills at night.

If it is more convenient, chlorella can be taken in two or three doses throughout the day rather than all at once.

Take chlorella before meals and with a large glass of water.

Because chlorella is rich in bioabsorpable iron, do not drink tea with chlorella. Tea can inhibit the absorption of iron.

In addition to taking chlorella tablets, using chlorella powder in cooking is very important, particularly when eating fish, which invariably contains a variety of toxins. Add 1-3 teaspoons of chlorella powder at a low temperature (60 degrees Celsius or below) or at the end of cooking in order to preserve its vitamins.

Recommendations for first use

It is best to begin by taking 1-2 chlorella tablets per day. Progressively increase the dose until reaching the desired dosage.

The average recommended dose of 10-15 tablets per day (2-5g) can be reached in 10 days.

Do I need to take chlorella year-round?

Chlorella can be taken every day, year-round. Alternatively, it can be taken in treatments of 3-4 months. These treatments should occur twice a year, once in spring and once in autumn.

Contraindications to chlorella

Those affected by hemochromatosis (an excess of iron) should not take chlorella because the supplement contains bioabsorbable iron.

If you are taking anticoagulants, consult your doctor before taking chlorella. Because chlorella contains vitamin K, which plays a role in coagulation, the supplement may affect anticoagulation treatment.

Side effects of chlorella

Possible intestinal disruption during the first days of use

Chlorella can stimulate intestinal activity immediately. Therefore, slight disturbances in intestinal behavior, including bloating, can occur during the first days of taking chlorella. These effects do not last.

The majority of new consumers notice an increase in intestinal activity without experiencing any significant discomfort. But if intestinal activity increases too much or too quickly, decrease the daily dose of chlorella or, if necessary, stop taking chlorella for several days.

Although few people experience a slowing down of intestinal activity, if this is the case, quickly increase dosage (30-60 tablets or more) and drink more liquids, preferably water. Normal functioning will return in approximately 10 days.

Side effets : Headaches, Vomiting, Joint pain, Dizziness…

Although they are rare, other side effects can occur after the first dose of chlorella. These may be due to the beginning of the detoxification process, which stirs up heavy metals that have accumulated in the body.

Side effects affect around 10% of people taking chlorella and vary in nature and intensity, depending on the level and type of pollutants in the body.

Some of the most common side effects include: headaches, sinus infections, joint pain, numbness, depressed mood, dizziness, and shaking.

To remedy negative side effects, increase dosage in order to accelerate the rate at which chlorella eliminates toxins and leaves the body. Take up to 15-30 tablets four times a day until side effects subside (8-10 days). Slowly reduce dosage amount and frequency until reaching a normal daily dose.

In some cases, consumers that are sensitive to caffeine have also experienced restlessness when taking chlorella with coffee. To avoid this side effect, it is best not to take chlorella with caffeine or at night.

If you’re looking for a natural & efficient heavy metal detoxification program, please see Dr Klinghardt detox program.

Organic Chlorella, grown in glass tubes in Europe

Box 650 tablets - Organic Chlorella

Box 650 tablets – Organic Chlorella

Premium European Chlorella grown in glass tubes

101.50 €

72.95 €

Order Premium Chlorella


* An article by Michel Dogna of Journal Soignez vous, N°26, « Mort lente par les métaux lourds » [Editor: Sté Santé Port Royal]

** (Source: Agence Française de sécurité sanitaire des aliments – Saisine 2002- 004 AFSSA)

Chlorella for pregnant women***

A recent study showed that women who consumed Chlorella daily during their pregnancy had fewer dioxins and more immunoglobin in their breast milk. Chlorella could thus help women produce breast milk that is more pure and that benefits the immune system and health of their children.

*** (Source: Nakano S, Takekoshi H, Nakano M. “Chlorella pyrenoidosa supplementation decreases dioxin and increases immunoglobulin concentrations in breast milk.” J Med Food. 2007 Mar;10(1): 134-42.)


  • The 10101y

    I am wondering if yaeyama Chlorella has interactions with some antidepressants or antisycotics? I’ve been taking 13.5 grams daily for months devided in three servings per day..of course I started out taking 3 grams per day an increased dosage by about 300 mg with each serving. Lately I’ve been experiencing increase in affects of my mental illness. So I decreased dosages down to 9 grams per day at 3 grams per serving. Three times per day.. Am I still getting to much iron.. I eat plant based foods often an am concerned about my losing about 60 lbs. I also walk jog three miles 5 times per week..this summer no real issues with chlorella but am worried about interactions with medications. I take Zoloft, welbutran an in bags. Is it possible better health due to chlorella exercise an nutritionist food maybe needing me to decrease meds? Is my mental health better an current dosages are to much now?

  • The 10110y

    Hello Darren,
    Unfortunately we cannot comment on a chlorella brand other than Chlorella Echlorial as we are not sure of its purity. You should consult your medical doctor regarding these matters and directly contact your chlorella brand. It is always advised not to take chlorella and any other type of medication at the same time.
    Thank you

  • The 11110y

    I have late stage lyme (most likely since 1990) started treatment ? One year now. When are the best times to take chlorella take am and Hs many antibiotics and 6pm supplemenrs. Also does chlorella pull mercury out of teeth. Can not afford 25000 for removal and scared to touch anything in there to make it worst . Do not wish false teeth would also be very costly as need to remove mercury safely although I did not check that cost. I take EDTA overnight 10days = 1,treatment and have gotten chelation 3 times for lead and more ongoing

  • The 1y

    Hi Joyce, it is best to take chlorella at least one hour before or after any other type of medication to make sure its precious components don’t interact with other chemicals.

  • The 10111y

    How long should Instop taking chlorella before going out in the sun?

    Thank you

  • The 11101y

    We are not sure to understand your question ? There is no contra-indications between sun exposition and chlorella intake. Just make sure you are well protected if you expose yourself to the sun, as always.

  • The 1100y

    My daughter is 33 month old and weights 24 lb, taking Kepra for her seizures and a mitochondrial cocktail (variety of supplements and vitamins for mitochondrial dysfunction) , she is G feeding tube. How much of Chlorella do you recommend for her?

  • The 1110y

    Young children the age of your daughter can easily take 1g / day. If you’d like to give her chlorella you could start with 0,2 g and increase dosage progressively while monitoring her stools. Don’t hesitate to get back to us when you receive your product. Thank you

  • The 10100y

    Can your chlorella be cooked? I would like to use this chlorella for heavy metal detox but would like to know if it will be effective in absorbing heavy metals even when warmed or cooked?

  • The 10100y

    Chlorella can be cooked and will remain capable to remove heavy metals but please, note that if the temperation is over 40 °C most of vitamins thermolabiles will be destroyed

  • The 11y


    Because chlorella assists in purging the metals from your body, how does it affect a person who has silver fillings?

  • The 100y

    Chlorella catchs metallic particles, not solid metal

  • The 10110y

    I would like to give Chlorella tablets (Sun Chlorella) to my dad who is 76 years old because of all the health benefits. However, he is allergic to mold. Will this be beneficial or would it hurt if I give this to him? Thanks in advance

  • The 10110y

    Hello and thank you for your message,
    Unfortunately we cannot give you indications regarding a different brand of chlorella other than eChlorial. We recommend you get in touch directly with your vendor.
    Thank you,

  • The 111y

    Thank you for creating this marvellous product. Just a question that I can not find answer on the site.
    Is it broken cell wass chlorella?
    As I understand that the human body can’t actually digest it whole and it should be consumed in a “broken cell wall” state.

  • The 111y

    Thank you Ollie for your kind comment! That is a question we receive regularly, you will find the answer in this article :)

  • The 1010y

    When you say it can’t be taken with tea, does that mean I can’t have tea at any time during this treatment? Or does that simply mean not to take it when I take at the same time I take my dose of chlorella?

  • The 1011y

    It means do not drink tea at the same moment if you need the iron from the chlorella.
    Tea prevents iron absorption. You can drink tea about 1 hour earlier or later.

  • The 10110y

    Im a first time user, and Im on oral contraceptive so how many tablets can I take on a daily basis?.

  • The 10111y



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