ABOUT
Smart discussion of the latest science and news on toxins in your food, water, and air, and what government agencies should be doing to protect public health. Written by EWG staff.
GET EWG'S TIPS & ACTION ALERTS
Sign up here to stay informed.
Get EWG widgets & blog badges.
ENVIROBLOG TO YOU
ENVIROBLOG VIA EMAIL
Will EPA regulate rocket fuel in drinking water?
Healthy Stuff search tool hits the mark
EWG testifies in Congress about cell phone radiation
SEARCH ENVIROBLOG
FEATURED
Find your sunscreen in EWG's 2009 report
Infant formula: How to choose it & use it
EWG's Tips for Parents: The Series
Buying our way to utopia? Not so much.
EWG's Tips to avoid BPA exposure
Let's talk some serious shop about TSCA reform
EWG on TV
Cutting the Pork from U.S. Farm Bill
Sunscreen safety & DC drinking water
Perchlorate in people, kids' personal care products & plastics, and sunscreen
BPA in baby formula & safe cosmetics
What can I do about fluoride in my water?
What is new carpet treated with? What can I do?
Are stainless steel water bottles safe?
Is mineral-based makeup safer?

PEOPLE TALKING TOXICS
TALK TO US
Did we miss something? Email Enviroblog.
« About BPA: Do you feel lucky? | Main | Find your sunscreen in EWG's 2009 report »
Is there too much fluoride in your dog food? Read EWG's new report
By Lisa Frack
You're probably familiar with the longstanding and often heated debate over the addition of fluoride to public water supplies. And while EWG does have an opinion on that, last week we focused on fluoride in dog food in a new report based on independent tests of 10 brands.
EWG's finding: High levels of fluoride in dog food
EWG found fluoride above healthy levels in 8 national brands of dog food marketed for both puppies and adults. The amount of fluoride in the dog food was up to 2.5 times higher than what the EPA has deemed a safe amount in drinking water.
Where is the fluoride coming from?
Some of this extra fluoride comes from the fluoridated water used to manufacture dog food. Most, however, is from the "bone meal" and various meat byproducts that are added to dog food - anything from "chicken byproduct meal" to "beef and bone meal."
These are basically ground bones, cooked with steam, dried, and mashed to make a cheap dog food filler. Since bones store fluoride, any product that includes bone meal is likely to be high in fluoride, too.
Why is excessive fluoride a problem?
Combined fluoride exposure from both food and water can easily range into unsafe territory. Routine exposure, like eating the same food every day, can predispose dogs to a variety of health problems: weakened bones, hormonal and behavior problems, and even bone cancer.
What can you do for your dog?
Check the ingredient list before you buy dog food. Look for and demand pet foods that do not include bone meal.
Read the full EWG report on fluoride in dog food.
[Thanks to MShades & Flickr CC for the pic]
Fluoride/Cancer link is Plausible, studies show
"Fluoride appears to have the potential to initiate or promote cancers, particularly of the bone...," according to the most recent and extensive review of fluoride toxicology by the prestigious National Research Council (NRC). (1)
Fluoride chemicals are added to about 70% of public water supplies ostensibly to reduce tooth decay, not to purify the water.
In 2006, the NRC found the.The Environmental Protection Agency's Maximum Contaminant Level Goal (MCLG) for fluoride is too high to be protective of health (4 mg/L) and must be lowered. EPA scientists have been saying this since 1986; but EPA management caved to political pressure and over-ruled its scientists. EPA is long overdue in revising fluoride's MCLG based on the 2006 NRC Fluoride Report, which was done at EPA's request.
According to Bill Hirzy, PhD, retired EPA scientist, "Since 1986 the [EPA HQ professionals] union has taken exception to EPA’s unscientific approach to dealing with the toxicity of fluoride in order to protect the USPHS [Public Health Service] program of national water fluoridation." (2)
Hirzy writes, "When I last spoke with the Division Director responsible for that risk assessment he told me EPA was waiting for a paper, promised three years ago by its principal first author, that would counter an epidemiology study done under that very author’s direction at Harvard."
Hirzy is talking about a published peer-reviewed study by Bassin (2a) which links fluoridation to osteosarcoma (bone cancer). Chester Douglass, Bassin's Harvard University advisor and, at that time, employee of Colgate (sellers of fluoridated dental products) signed off on Bassin's work. But, Douglass told the NRC panel that no such study existed, according to the Environmental Working Group.(3)
The whole fluoridation program appears to rest upon the shoulders of Chester Douglass whose much anticipated osteosarcoma/fluoridation research has yet to be published even though it was promised years ago, costing tax payers millions of dollars.
But, there's more evidence linking fluoride to osteosarcoma (See: http://www.fluoridealert.org/health/cancer/osteosarcoma.html ) and loads of evidence linking fluoride to adverse health effects - even at low doses added to public (and some bottled) water supplies (See: http://www.fluoridealert.org/health/ )
At least three members of the NRC fluoride panel believe the MCLG for fluoride should be zero.
Continued with References: http://tinyurl.com/Fluoride-Cancer-Link
Thanks for your comments! It is also important to note how far the science on fluoride effects has developed over the last decades since the start of water supply fluoridation in the U.S. We now know that fluoride acts on the teeth post-eruptively, and that really changes the public health debate on fluoridated water vs. fluoridated dental products.
A lot of people have asked about the specific brands that we had tested because we chose not to share them. Here's our thinking, from EWG Senior Scientist Olga Naidenko:
There are many brands of dog food on the market. Our testing analyzed just a small snapshot of all the different brands, which is why we did not disclose the specific ... Read Morenames of the brands. Additionally, there is a lot of variability in pet foods even from the same manufacturer.
Thus, our conclusion is really not about any specific brand - as many pet owners know, bone meal is, unfortunately, a common filler ingredient, so when we shop for food for our pets - whatever brand we choose - we need to be very careful in reading the labels to be sure that it does not include ingredients of concern, such as bone meal.
EXcess fluorine in Dog food is primarily from unpurified Phosphorus which contains fluorine and lead. The unpurified form of phosphorus is cheap and added as a mineral supplement. I think farm animal feed is regulated with respect to fluorine concentration so bone mean and byproducts of farm animals is probably not the source of the excess fluorine.