Does Eating Organic Food Help Prevent Cancer? (usatoday.com)

An anonymous reader quotes USA Today: People who regularly eat organic food are less likely to develop cancer than those who don't, according to a new study out of France. A team of researchers studied 68,946 adult volunteers from France who provided information on how often they ate organic food, drinks and even dietary supplements. Participants were given a score, based on how often they eat organic food ranging from "most of the time" to "never" or "I don't know." During two follow-up appointments, one in 2009 and another in 2016, the researchers then tracked cancer diagnoses, the most prevalent being breast cancer. Other cancers observed included prostate cancer, skin cancer, colorectal cancer, non-Hodgkin lymphomas and lymphomas.

People who reported higher organic food scores were less likely to be diagnosed with cancer than the rest of the group. For example, those who consumed the most organic food were 25 percent less likely to have cancer, according to the research. That number grew to more than half when looking at cases of non-Hodgkin lymphoma.

Comments

Because...

[illiac_1962]

Because they are less likely to eat gobs of added sugar. Nothing to do with the purity label of thier food.

Re:Because...

[ShanghaiBill]

perhaps they have adjusted for 'people that eat large amounts of organic food generally being more health concious'.

TFA quotes several scientists criticising the study because it did NOT correct for other factors. So this could just be "eating organic" being correlated with eating fewer calories and less sugar and processed food. It could also just be a correlation with being more affluent, which is already known to be correlated with better health.

Studies based on surveys, like this one, should be viewed with far more skepticism than studies based on controlled experiments.

Re: Because...

[poity]

Organic != Pesticide free

Plenty of pesticides are used in organic farming, just not synthetic ones designed, for example, to target specific organisms or to break down quickly before reaching consumers.

As another comment pointed out, wealth is associated with both organic food consumption and better health. As well those who make the conscious decision to buy higher priced organic food have demonstrated a greater awareness of personal health choices (however misguided they may be on the subject of organics and pesticides) and a greater willingness to make an effort into improving their lifestyles, perhaps some stumbling into some that are actually effective.

Correlation != Causation

[overlook77]

It's also very possible that people who eat organic food are just more cognizant about nutrition, health, and they food they eat. I'd like to see a study of two groups who both eat healthy and excercise, but one group eats organic food. Not slamming organic food, but I am skeptical.

Major problems

[gurps_npc]

First is Self Reporting. This study did NOT find that people that ate more organic food got less cancer. Instead it found that people that CLAIMED to eat more organic food got less cancer. That desire tends to be highly correlated with education, wealth, and health consciousness.

Second the availability of organic food is almost non-existent for the poor. You can't make that claim if you live in a food desert of a slum, next to a toxic waste dump because the grocery stores in those neighbourhoods do not carry organic food.

I am willing to bet that people that claimed to eat organic food also had much better living conditions in general. I would be surprised if they were not less likely to smoke, drink, live next to toxic waste dumps, live in slums, live next to smoke filled factories, etc. etc.

Studies of this type are good only to convince people to fund a REAL study where you take half the people and give them organic food and the other half regular food.

Then measure the result in 10 years.

 

It's a tough correlation to sustain

[HangingChad]

The background cancer rate is one in three. So, with any environmental factor, the numbers are clouded with a lot of noise.

More likely people who eat organic food think about their health more than people who don't care what they eat. People who make organic choices are likely eating more vegetables, which has already moved the needle on their cancer risk. As an individual, you can't tell if this little thing or that little thing will really lower your cancer risk. What does work is eating like a sane person, exercising, and keeping your alcohol intake in the moderate zone.

Did they control for income?

[presidenteloco]

Income level is one of the strongest determinants of health.
Generally, regular organic food purchasers will be above average income, no?

Did they control for other health-promoting or harming behaviours, which are likely to differ between organic food choosers and general population.

It could be the pesticides, but it could also be any number of other factors associated with lifestyle, unless these were carefully controlled for in the experiment.

Re:Confounders?

[quantaman]

Exactly, neither one of you have READ THE STUDY YET! https://jamanetwork.com/journa... Why would you ALREADY have pre-formed conclusions about it? Exactly.

Actually I did read the study, though I don't really have the training (or time) to fully understand everything they did I understood enough to validate that.
a) They did a good job trying to control for other variables.
b) They couldn't control for everything because it's really tough to do.

The point isn't that their research is useless, a 25-ish% drop in cancer is really significant. The point is that this study alone doesn't provide the answers that people want. They found a big correlation between organic food consumption and lower cancer rates, now future studies can start narrowing in on that. Was it the organic food and something in the non-organic pesticides? Was it the types of food that organic food eaters eat? Was it another lifestyle choice that correlates with organic food consumption.

"Organic" farming is insufficiently managed.

[Futurepower(R)]

Quote from the parent comment: "Plenty of pesticides are used in organic farming..."

See, for example, The Truth About Organic Farming (Dec. 22, 2009)

Quote:

"It has been assumed for years that pesticides that occur naturally (in certain plants, for example) are somehow better for us and the environment than those that have been created by man. As more research is done into their toxicity, however, this simply isn't true, either. Many natural pesticides have been found to be as bad if not worse than synthetic ones.

"Take the example of Rotenone. Rotenone was widely used in the US as an organic pesticide for decades 3. Because it is natural in origin, occurring in the roots and stems of a small number of subtropical plants, it was considered "safe" as well as "organic". However, research has shown that rotenone is highly dangerous because it kills by attacking the mitochondria, the energy powerhouses of all living cells. Research found that exposure to rotenone caused Parkinson's Disease-like symptoms in rats 4, and killed many species, including humans. Rotenone's use as a pesticide has already been discontinued in the US as of 2005 due to health concerns, but shockingly, it's still poured into our waters every year because it is approved for fisheries management use as a piscicide [poisonous to fish] to remove unwanted fish species. The point I'm driving home here is that just because something is natural doesn't make it non-toxic or safe."

Other issues: There are other issues that are generally not explored. For example, if a food is labeled "Organic", is it actually that, or is the label not honest?