Most adults eat too few vegetables, and five a day can cost under $3

Key takeaways

• In 2019, only 10% of U.S. adults ate enough vegetables and 12.3% ate enough fruit, according to the CDC¹.
• Harvard researchers pooled data on about 2 million adults and found that about five servings a day, two fruit and three vegetable, was linked to the lowest risk of death³.
• Potatoes, corn, peas and fruit juice were not linked to that benefit, while leafy greens, citrus, berries and carrots were³.
• At 2023 prices, USDA data put a cup of watermelon at 26 cents and a cup of whole carrots at 31 cents⁶.
• The FDA says to rinse produce under running water and skip soap, detergent and store-bought produce washes¹⁰.

Nutrition experts argue about eggs, butter, protein and seed oils. On fruits and vegetables, they mostly agree.

The 2025–2030 Dietary Guidelines for Americans, released in January 2026, call for about 3 servings of vegetables and 2 servings of fruit a day on a 2,000-calorie diet².

Agreement isn’t the problem. Doing it is. When the CDC analyzed its 2019 phone survey of nearly 300,000 adults, only 10.0% met the vegetable target and 12.3% met the fruit target¹.

The gaps were wide. In Kentucky, 5.6% of adults ate enough vegetables, compared with 16.0% in Vermont. Only 7.6% of men did¹.

If you value whole food, this is home ground. This article covers what the biggest studies say about how much to eat, which kinds matter most, how to buy produce cheaply, and what to make of pesticide lists.

About five servings a day is where the benefit levels off

In 2021, a team led by Dong Wang at Harvard Medical School and Brigham and Women’s Hospital published one of the largest looks at this question in the journal Circulation³. They followed more than 100,000 U.S. nurses and health professionals for up to 30 years, then pooled 26 more studies covering about 1.9 million people in 29 countries and territories³.

The sweet spot was five servings a day. Set against people eating two, those eating five were 13% less likely to die of any cause during the study years³. Their chance of dying from heart disease or stroke was 12% lower, from cancer 10% lower, and from lung diseases such as COPD 35% lower³.

Within those five, about two servings of fruit and three of vegetables looked best. Going past five brought no further gain³.

A 2017 review led by Dagfinn Aune in the International Journal of Epidemiology reached a slightly different ceiling⁴. It pooled 95 studies. Each extra 200 grams a day was linked to a 10% lower risk of death and a 16% lower risk of stroke⁴.

In that review, risk kept falling up to 800 grams a day, a bit under 2 pounds, for most outcomes⁴. For cancer, the benefit leveled off at 600 grams⁴. If the link is causal, the authors estimated that eating less than 800 grams a day could account for about 7.8 million early deaths worldwide in 2013⁴.

Why the different ceilings? One possible reason is that studies measure produce in different ways, by servings in one and by grams in another, and a “serving” isn’t the same size everywhere.

Both reviews rely on observational studies, which track what people already eat rather than assigning diets. People who eat more produce may also exercise more or smoke less, so these studies can’t prove cause. Still, the results are consistent across many countries and decades.

Potatoes and juice didn’t earn the same credit

In Wang’s analysis, three foods that count as produce on federal charts showed no link to a lower risk of death or chronic disease: potatoes, starchy vegetables like corn and peas, and fruit juice³.

The standouts were leafy greens such as spinach, lettuce and kale, along with produce rich in vitamin C or beta-carotene, such as citrus fruits, berries and carrots³.

Aune’s review pointed in the same direction. Apples and pears, citrus fruits, leafy greens, cruciferous vegetables such as broccoli and cabbage, and salads were linked to lower risk of cardiovascular disease and death⁴. Cruciferous and green-yellow vegetables were linked to lower cancer risk⁴.

This doesn’t make potatoes bad food. They’re one of the cheapest vegetables in the store⁶. It does suggest not counting a potato as one of your three vegetables every day.

Juice is similar. The new guidelines say 100% juice should come in limited portions or be diluted with water². A later article in this series covers smoothies versus whole fruit.

Color points to real plant compounds, but the pills didn’t deliver

The new guidelines tell Americans to eat a variety of colorful vegetables and fruits². Color is a decent shopping cue. Carrots, sweet potatoes and leafy greens are rich in beta-carotene and related pigments that the body turns into vitamin A⁵.

For a while, researchers hoped they could bottle that benefit. Two large trials tested it, and the results were a sharp lesson.

In one, 29,133 male smokers took 20 milligrams of beta-carotene a day or a placebo for five to eight years. Lung cancer rose 18% and deaths rose 8% in the beta-carotene group⁵.

In the second, 18,314 smokers, former smokers and asbestos-exposed workers took beta-carotene plus vitamin A. Lung cancer rose 28% and lung cancer deaths rose 46%, and the trial was stopped early⁵. In nonsmokers, these supplements don’t appear to change cancer risk either way⁵.

Meanwhile, studies of real diets keep linking carotenoid-rich produce with lower lung cancer risk⁵. The pigment didn’t work alone, at least not in pill form.

That fits a core natural-health instinct: the whole food is more than its best-known ingredient. A carrot brings fiber and many other plant compounds along with its color. Use color to vary your choices, not to pick a supplement.

The cheapest cup of produce costs about a quarter

The USDA’s Economic Research Service tracks what more than 150 fresh and processed fruits and vegetables cost per edible cup, the unit federal advice uses⁶. Here are some of the best buys from its 2023 data.

Produce	Form	Cost per cup (2023)
Watermelon	Fresh	$0.26
Cucumbers, with peel	Fresh	$0.30
Potatoes	Fresh	$0.30
Bananas	Fresh	$0.31
Carrots, whole	Fresh	$0.31
Green cabbage	Fresh	$0.35
Onions	Fresh	$0.42
Pineapple	Fresh	$0.48
Apples	Fresh	$0.50
Roma tomatoes	Fresh	$0.51
Green beans	Canned	$0.54
Sweet potatoes	Fresh	$0.58
Collard greens	Fresh	$0.61
Tomatoes	Canned	$0.65
Mixed vegetables (carrots, peas, corn, green beans)	Frozen	$0.66
Oranges	Fresh	$0.86
Broccoli	Frozen	$1.00

Source: USDA ERS average retail prices per cup equivalent⁶.

This is a sample day: one cup each of bananas, oranges, carrots, cabbage and frozen broccoli. Adding up the unrounded ERS averages for those five gives about $2.84 for five cups⁶. That’s our own estimate from USDA prices, not a USDA figure.

Prices at your store will differ, and ERS warns that its numbers can’t be used to track price changes from year to year⁶. The point holds anyway: the cheapest produce is often the plainest.

Fresh, frozen or canned: price and what’s added

Fresh isn’t always the cheaper choice. In the 2023 data, canned corn cost $0.68 a cup versus $1.42 for fresh, and frozen raspberries cost $2.05 versus $2.65 fresh⁶. But fresh carrots, at $0.31, beat canned carrots at $0.65⁶.

Our article on processed foods covers a lab study that compared the vitamins in fresh and frozen produce. The new guidelines say frozen, dried or canned produce with little or no added sugar can be good options².

What gets added matters most:

• Sodium. Look for “low sodium,” which means 140 milligrams or less per serving, or “no salt added,” which can still contain some natural sodium. Rinsing canned vegetables also removes some sodium, the FDA says⁷.
• Sugar. Pick fruit packed in juice or water rather than syrup, in line with the guidelines’ advice on added sugar².
• Sauces. Choose plain frozen vegetables and season them yourself.

Pesticide tests and the Dirty Dozen use the same government data

If pesticide worries make you hesitate at the produce bin, it helps to know what the testing shows.

Each year, the USDA’s Pesticide Data Program collects foods and tests them after preparing them the way a home cook would. In the 2024 tests, staff rinsed samples under cold running water for 15 to 20 seconds and peeled foods such as oranges that people normally peel⁸.

Of 9,872 samples, 42.3% had no detectable residue, and more than 99% were below the limits the Environmental Protection Agency sets, called tolerances⁸. Seventy-six samples, 0.77%, were over a tolerance, and 63 of those were imported⁸. Another 3.7% carried a pesticide that has no tolerance set for that food⁸.

The Environmental Working Group, an advocacy organization, uses the same USDA data differently. Its 2026 Shopper’s Guide analyzed 54,344 samples of 47 crops and ranked them by the number, frequency, amount and toxicity of residues⁹. Spinach topped its “Dirty Dozen,” followed by kale and other dark greens, then strawberries. Pineapple, sweet corn and avocados led its “Clean Fifteen”⁹.

The two answer different questions. USDA asks whether residues are within legal limits. EWG ranks crops against each other and suggests buying organic for the top of its list when that’s within reach⁹.

On one point they agree. EWG says its guide shouldn’t discourage anyone from buying produce, organic or conventional⁹. If cost is the barrier, our article on the organic premium shows where it’s small and where it isn’t, and later articles in this series cover organic food in depth.

Rinse under running water. Skip the soap.

The FDA’s produce advice is simple, and it applies to all produce, organic or not¹⁰:

• Rinse produce under running water before you cut, cook or eat it.
• Use a clean brush on firm produce like melons and cucumbers.
• Dry it with a clean cloth or paper towel.
• Cut away bruised or damaged spots.
• Don’t use soap, detergent or commercial produce washes. The FDA doesn’t recommend them.
• Bagged greens labeled “pre-washed” or “ready to eat” don’t need another rinse.

Washing lowers the bacteria on produce, but it doesn’t remove all of them¹⁰. The new guidelines also say to wash produce well before eating it raw or cooking it².

Produce prescriptions look promising, but proof is still coming

Some clinics now “prescribe” fruits and vegetables, giving patients money to spend on them. The USDA’s Gus Schumacher Nutrition Incentive Program, known as GusNIP, funds these programs along with produce incentives for SNAP shoppers. From 2019 to 2024, it gave more than $330 million to more than 250 projects¹².

A large 2023 evaluation led by Kurt Hager tracked 3,881 adults and children enrolled in nine programs, at 22 sites across 12 states¹¹. The typical participant got $63 a month to spend on produce and took part for about six months¹¹.

Adults added 0.85 cups of fruits and vegetables to their day, and the chance of being food insecure fell by about a third¹¹. HbA1c, a measure of average blood sugar, fell 0.29 points in adults whose levels started in the diabetes range. In adults with high blood pressure, the top number dropped about 8 points¹¹.

There’s a catch: the study had no comparison group¹¹. Some of those changes could reflect other care or normal ups and downs. It’s encouraging, and randomized trials are the next test.

How strong is the evidence?

Claim	Rating	Why
About five servings a day is linked to a longer life	Strong evidence	Consistent across about 2 million people, though from observational studies34
Eating well past five servings adds more benefit	Promising but early	One analysis found a plateau at five; another saw gains up to 800 grams34
Potatoes and juice protect health the way other produce does	Not enough evidence	The Harvard analysis found no link between either one and lower risk of death3
Beta-carotene pills can stand in for produce	Evidence says no, or unsafe	They raised lung cancer in smokers5
Produce prescriptions lower blood sugar and blood pressure	Promising but early	Before-and-after results with no control group11

Five a day without trying

Willpower fades. Defaults last. This routine attaches produce to meals you already eat, so you don’t have to remember it.

1. Breakfast, one fruit. Slice a banana onto oatmeal, or stir in frozen berries.
2. Lunch, one vegetable. Add a handful of greens, raw carrots or a cup of canned tomatoes to soup.
3. Snack, one fruit. Keep an orange or an apple where you can see it.
4. Dinner, two vegetables. Make half the plate vegetables: one frozen, one fresh or canned.
5. Shopping, a standing order. Each week, buy one leafy green, one orange vegetable, one cruciferous vegetable (cabbage, broccoli), one citrus fruit and one bag of frozen vegetables.

Count your cups for three days. If you land under five, add the missing serving at the meal where it’s easiest. The new guidelines don’t say how big a serving is². The previous ones, which the CDC used, set about 1.5 to 2 cups of fruit and 2 to 3 cups of vegetables a day for most adults¹.

Questions readers ask

The bottom line

Fruits and vegetables are the rare nutrition advice with almost no debate behind it. About five servings a day, built mostly from leafy greens, citrus, berries, carrots and cruciferous vegetables, is linked to a longer life, and potatoes and juice don’t carry the same weight.

You don’t need expensive produce, a juicer or a supplement to get there. Cheap staples, frozen bags, a rinse under the tap and a routine that puts produce at every meal will do most of the work.

Related reading

• A healthy month of groceries, priced by the government
• Where the organic premium is small and where it isn’t
• Frozen peas and candy bars are both processed, and the difference matters
• What a farmers market sign promises, and what you should ask
• Why observational studies got smoking right and hormone therapy wrong

Sources

1. Lee SH, Moore LV, Park S, Harris DM, Blanck HM. “Adults Meeting Fruit and Vegetable Intake Recommendations — United States, 2019.” CDC, Morbidity and Mortality Weekly Report, 2022. cdc.gov
2. U.S. Department of Agriculture and U.S. Department of Health and Human Services. “Dietary Guidelines for Americans, 2025–2030.” January 2026. cdn.realfood.gov
3. American Heart Association. “The right 5-a-day mix is 2 fruit and 3 vegetable servings for longer life” (news release on Wang DD et al., Circulation). 2021. newswise.com
4. Aune D, Giovannucci E, Boffetta P, et al. “Fruit and vegetable intake and the risk of cardiovascular disease, total cancer and all-cause mortality: a systematic review and dose-response meta-analysis of prospective studies.” International Journal of Epidemiology, 2017. pubmed.ncbi.nlm.nih.gov
5. NIH Office of Dietary Supplements. “Vitamin A and Carotenoids: Fact Sheet for Health Professionals.” Updated March 2025. ods.od.nih.gov
6. USDA Economic Research Service. “Fruit and Vegetable Prices” (2023 data). Updated December 2025. ers.usda.gov
7. U.S. Food and Drug Administration. “Sodium in Your Diet.” 2024. fda.gov
8. USDA Agricultural Marketing Service. “Pesticide Data Program Annual Summary, Calendar Year 2024.” December 2025. ams.usda.gov
9. Environmental Working Group. “EWG’s 2026 Shopper’s Guide to Pesticides in Produce.” March 2026. ewg.org
10. U.S. Food and Drug Administration. “Selecting and Serving Produce Safely.” 2024. fda.gov
11. Hager K, Du M, Li Z, Mozaffarian D, et al. “Impact of Produce Prescriptions on Diet, Food Security, and Cardiometabolic Health Outcomes: A Multisite Evaluation of 9 Produce Prescription Programs in the United States.” Circulation: Cardiovascular Quality and Outcomes, 2023 (summary by UCSF SIREN). sirenetwork.ucsf.edu
12. USDA National Institute of Food and Agriculture. “Gus Schumacher Nutrition Incentive Program (GusNIP).” Updated July 2026. nifa.usda.gov
13. NIH Office of Dietary Supplements. “Vitamin K: Fact Sheet for Health Professionals.” Updated March 2021. ods.od.nih.gov
14. U.S. Food and Drug Administration. “Grapefruit Juice and Some Drugs Don’t Mix.” 2021. fda.gov
15. National Institute of Diabetes and Digestive and Kidney Diseases. “Healthy Eating for Adults with Chronic Kidney Disease.” Reviewed January 2025. niddk.nih.gov