Chlorella is available as Chlorella pyreneidosa and Chlorella vulgaris (with the latter boasting a higher CGF content and easier digestability). While chlorella itself already is very popular with various health "gurus" for its numerous health-promoting effects[1] and among other things is used as an intestinal binding agent for mercury, Chlorella growth factor (CGF) is a concentrate of certain peptides, proteins and other components and boasts additional advantages[2].

Chlorella growth factor (CGF) and tooth decay prevention in children: a scientific study

A six-year study conducted with Japanese children who took one capsule of "chlorella growth factor" daily showed that these children developed no cavities while developing near-perfect maxillary arches (no overbite, dental misalignment etc.). The children also benefited in other ways, they suffered less illnesses and grew earlier to a larger size, had a higher I.Q. and were socially better skilled.

Dr. Dietrich Klinghardt recommends a dosage of 1 capsule CGF for each 20 tablets of chlorella taken.

Chlorella and adults' teeth

It seems likely that whole Chlorella helps adult teeth as well. According to a testimonial I've seen, chewing chlorella daily (particularly after eating sugary foods) has helped keeping teeth in perfect order for over two decades.

Shopping for chlorella products

I would strongly advise to go for the highest quality you can find. In addition to their nutritional assets, chlorella and chlorella products are frequently consumed for heavy or toxic metal detoxification purposes (mercury, aluminum etc.) due to their ability to chelate (bind) these and other contaminants and "escort" them out of the body.

By the same token, chlorella can take up substantial amounts of contaminants such as arsenic, copper, and others while being grown.[3] Make sure to go for organic or similarly pure quality which has been tested for any possible contamination.

A note re the taste of chlorella

I've bought organic chlorella twice so far. The first tasted pretty disgusting — bitterish and unpleasant. The second one tastes mild and slightly sweet. I don't know why, perhaps it's the freshness that accounts for the great difference in taste.


German top toxicologist Dr Dr Max Daunderer warns anyone carrying amalgam fillings (and/or having mercury deposits from this or other sources) against taking algae. According to Daunderer, algae bind mercury via methylation, forming methyl mercury which is able to penetrate the blood-brain barrier, irreversibly settle in the brain and create symptoms of brain toxicity including extreme nervousness.

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1 Chlorella is considered a super nutrient or food — it is antiviral, binds toxins, repairs and activates the body's detoxification functions/strengthens the immune system, contains gamma- and alpha-Linolenic acid, methylcobalamin (a form of vitamin B12), restores bowel flora, helps alkalinize the tissues etc.
2 For details compare for instance Dr. Dietrich Klinghardt M.D., Ph.D. On Effective Holistic Heavy Metal Detoxification [Chelation].
3 Compare for instance Comparative uptake study of arsenic, boron, copper, manganese and zinc from water by different green microalgae.

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