Bathing in fluoridated water

Among the anti water fluoridation community, we all understood that ingesting eat fluoridated water is bad. But how about bathing in fluoridated water?

The following article provides an insight into the danger.

In the study to assess the fluoride exposure in areas worth endemic fluorosis, the author said that fluoride absorption through the skin is approximately 1/1000 of the amount as when you drink it in.

Considering that we normally use a lot more water to bath, this might mean that the amount of fluoride reduction from not drinking fluoridated tap water, may be offset by the fluoride gained from bathing.

Still, it might be worthwhile to go for a quick shower instead of a long luxurious bath.

article details follows, for those who want to read it for themselves.

Probabilistic risk assessment of Chinese residents exposure to fluoride
in improved drinking water in endemic fluorosis area


  • 2017-12-19_18:36 SGT to correct the misreading that the reduction is 3 folds instead of 3 folds of magnitudes.

An Experiment on Singapore tap water


Water fluoridation is an archaic practice that descended from bad science. Public Utility Board (PUB) says that Singapore water is fluoridated at 0.5 ppm. pub 1 However, this is a simplistic assessment and does not taken into account how the boiling of water serves to concentrate fluoride. The danger of fluoride accumulation is especially pronounced given that boiling water is a basic cooking method all over the world. Especially in Singapore. The purpose of this paper is to investigate the level of fluoride in Singapore water. As well as to consider the risk of over exposure.


The measurements were done using EXSTIK FL700 fluoride meter that is newly procured for the purpose of the test. The meter has a measuring range from 0.1 ppm to 9.99 ppm. The test were conducted on various water samples in Singapore. The water sample were measured in the small plastic vial provided with the instrument.


No Experiment ppm date comment
1 Tap water 0.7 2017-11-25
2 Distilled water 0 2017-11-25
3 bottled water from Northern Airlines 0 2017-11-25
4 tap water boiled once 0.8 2017-11-25
5 water dispenser cold 0.8 2017-11-25
6 water dispenser hot 0.9 2017-11-25
7 distiller residue >9.99 2017-11-25 exceeded measuring range
8 ice mountain pure drinking water 2.4 2017-12-03 highest among bottled drinking water
9 dasani drinking water 2.2 2017-12-03
10 evian mineral water 0.2 2017-12-03
11 Danone Aqua spring water 0.2 2017-12-03
12 marina mandarin oxygenated drinking water 0.1 2017-12-05 lowest among bottled drinking water. But not available off the shelf.
13 Fiji mountain spring 0.4 2017-12-19 higher than most spring water but lower than tap water. the higher level probably reflects’s Fiji’s volcanic proximity.

the data above will be updated as when new readings are made.


Water samples show an increase in fluoride level after boiling or even after passing through a water dispenser. Measurement of the water sample inside the distiller exceeds the instrument measuring threshold. This simulates the sustained boiling effect applied in many cuisine preparation. This is indicative that there will be increased fluoride level in those dishes. When buying bottled water, it’s best to go for mountain or spring water. As the drinking water tested all contain elevated levels of fluoride (compared to tap water).


The only way to avoid the fluoride concentrating effect of boiling is by the removal of fluoride from our water source.

Fluoride Affects IQ


Dental Fluorosis is Strongly Connected to Lowered IQ

harvard children1a

Harvard School of Public Health: Fluoride’s Neurotoxicity

cdc dental fluorosis 3

dental fluorosis sg1

Neurotoxicology and Teratology 47 (2015) 96–101

f neurotoxic 2014-1f neurotoxic 2014-2Neurotoxicology and Teratology 47 (2015) 96–101


100 kids


water glass ch 6a

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