When you bite into a strawberry or tuck into some spinach or kale you may be congratulating yourself on your healthy food choice. Most people won’t even think about the pesticides they’re likely ingesting.

A list published last week noted that almost all of the samples of strawberries from the most recent tests conducted by the U.S. Department of Agriculture contained residues of at least one pesticide, even after washing. Nearly 60 percent of the sampled kale — frequently championed as a nutritious health food — had pesticide residues.

In all, around 70 percent of produce sold in the U.S. has pesticide residues, according to the annual “Dirty Dozen” report by nonprofit group The Environmental Working Group (EWG), which lists the foods with the highest and lowest levels of pesticide residues. It says we may be exposed to worrying amounts of pesticides.

“Studies have shown that eating fruits and vegetables free of pesticides benefits health, and this is especially important for pregnant women and children,” said Carla Burns, of the EWG.

This is one of a number of recent studies about the pesticides we consume through our fresh food, which are fueling a debate about whether consumers should be worried and how they can reduce exposure.

When it comes to the impact of pesticides on consumer health, the science is far from clear.

Government health experts say we do not need to worry as the levels of pesticide exposure from food are below the levels that could pose a risk to consumers’ health. Carl K. Winter, a food toxicologist at U.C. Davis, specifically analyzed the EWG list in a 2011 study and concluded that the quantities of pesticides mean that risks to consumers were negligible and that moving to organic versions — as the EWG suggests — was unlikely to bring people any measurable health benefits.

Organic produce is farmed to strict federal standards but it is not necessarily pesticide-free — the food just tends to be free from any synthetic pesticides. Also, for many people, buying organic may be prohibitively expensive. A Consumer Reports study found on average organic food was 47 percent more expensive than conventional produce.

The EWG acknowledges that a bigger risk than pesticides, as far as consumers are concerned, is not having enough fruit and vegetables in your diet, full-stop. The same point was echoed by public health researchers.

“It’s not healthy for people to be scared of their food,” said Asa Bradman, a professor at UC Berkeley School of Public Health. “There are a few articles that hint at the benefits of organic versus conventional, but at this point, the information is only limited and the benefits of eating a healthy diet and a good selection of fruit and vegetables means I would not want to discourage consumption of those foods by people.”

As science continues to seek a clearer picture on pesticides and consumer health, one thing that does seem clear is that there’s a swath of people who are much more clearly affected but tend to get ignored: The farmworkers who bring the food to our plates.

“My personal view is that the risk to consumers is low compared to the potential risk to agricultural workers,” said Bradman.

Thousands of farmworkers experience the effects of acute pesticide poisoning including headaches, nausea, shortness of breath or seizures, according to the nonprofit Farmworker Justice. Long-term exposure can lead to chronic health problems, such as infertility, neurological disorders and cancer, says the NGO, which has been documenting pesticide poisoning among workers.

One of the starkest examples came from Caldwell in Idaho. A crew of 29 farmworkers began weeding a field of onions and noticed that their clothes were getting wet, but they just assumed it was dew. What they didn’t realize — because no warning signs had been placed on the field — was that a contractor had applied three pesticides to the field during the night without notifying the farm owner.