Produce Decision Guide
Fruits and vegetables are often seen as clean by default, but how they are grown and handled can vary a lot. Much of that difference comes down to what is applied to the surface of the food. Pesticides, coatings, and post-harvest treatments can all sit directly on what you eat, making produce one of the more direct exposure categories and contributing to exposure over time.
Organic / Minimal Treatment
Lowest exposure from growing and handling
Organic / Minimal Treatment
Lowest exposure from growing and handling
Produce grown with fewer synthetic chemicals and minimal post-harvest handling, resulting in the lowest overall residue exposure.
Organic / Treated or Coated
Lower pesticide use, but added surface treatments
Organic / Treated or Coated
Lower pesticide use, but added surface treatments
Still lower in synthetic pesticide use, but extra handling, coatings, or transport steps can add more direct surface exposure.
Conventional / Lower Residue
Sprayed during growing, but less of the surface is eaten
Conventional / Lower Residue
Sprayed during growing, but less of the surface is eaten
These foods are commonly sprayed during growing, but thicker skins or peels reduce how much residue ends up being consumed.
Conventional / High Residue
Highest direct exposure from what sits on the food itself
Conventional / High Residue
Highest direct exposure from what sits on the food itself
These foods are often treated multiple times and have little protection between the surface and the part you eat, making them the highest exposure category.
How to think about produce choices
When comparing produce, the main difference is what has been applied to the food and how much of it remains when you eat it.
Some produce is grown with fewer synthetic inputs, while others are treated throughout the growing process with pesticides and herbicides. After harvest, additional coatings or treatments may also be used to improve appearance and shelf life.
In practical terms, it helps to focus on:
- What has been applied during growing (pesticides, herbicides)
- What has been added after harvest (waxes, coatings, preservatives)
- How much of that is likely to remain on or in the food you eat
Unlike other categories, there is very little separation between the surface and consumption. What is on the food can become part of what you ingest.
The goal is to choose produce that reduces these inputs and limits direct exposure from what sits on the food itself.
Where exposure comes from
With produce, exposure comes directly from what is applied to the food.
During farming, many crops are treated with pesticides and herbicides to control insects, weeds, and disease. These chemicals can remain as residues on the surface and, in some cases, be absorbed into the plant itself.
After harvest, additional substances may be applied, including:
- Wax coatings to improve appearance and extend shelf life
- Fungicides to prevent spoilage during storage and transport
- Preservatives used on imported produce
These treatments can sit directly on the portion you eat.
Washing produce can help reduce some surface residue. Using methods like a baking soda soak or thorough rinsing can remove part of what sits on the outside.
However, some pesticides and herbicides can be absorbed into the plant during growing. When that happens, washing does not remove it, which is why how the food is grown still matters.
Many pesticides used in agriculture have been linked to hormone disruption, neurological effects, and other long-term health concerns. Because produce is eaten regularly, this becomes a repeated source of exposure.
The level of residue varies by crop, which is why some foods consistently test higher than others.
What to look for when buying produce
You don’t need to overcomplicate it, but a few patterns make a clear difference.
Thin-skinned produce (berries, leafy greens)
More likely to carry higher residue because there is little barrier between the surface and what you eat
Thick-skinned produce (avocados, bananas, citrus)
Less of the surface is consumed, which reduces direct exposure
Organic options (look for USDA Organic certification)
Generally limit the use of synthetic pesticides, though they are not completely untreated
Imported or long-shelf-life produce
More likely to involve additional coatings or post-harvest treatments
Produce that looks unusually shiny, waxy, or polished
Often indicates waxes or surface coatings have been applied
Common labels explained
Organic
Produced under standards that limit synthetic pesticides and fertilizers. Still may use certain approved substances.
Conventional
Standard farming practices, which can include a wide range of pesticides and herbicides.
Non-GMO
Refers to genetic modification, not pesticide use. A product can be non-GMO and still have pesticide residues.
Washed / pre-washed
May remove some surface residue, but does not eliminate all exposures.
Bottom Line
Produce differences come down to what has been applied to the food and how much of that remains when you eat it. Some fruits and vegetables carry higher levels of pesticide residue and surface treatments, while others are less exposed based on how they are grown and structured.
The goal is to choose produce that minimizes pesticide residue and avoids unnecessary surface treatments where possible.