Fruits and Vegetables: Health and Nutrition Basics
Author: Disabled World (DW)
Updated/Revised Date: 3 Nov 2026
Table of Contents:
Synopsis - Definition - About This Section - FAQs - Publications - Subtopics
Synopsis
Learn how a variety of colorful fruits and vegetables support health, from lower blood pressure and heart disease risk to the nutrients in each color group.
At a Glance
- 1 - Onions offer vitamin C and fiber with only 45 calories per serving.
- 2 - Botanically, fruits are the ripened ovaries of plants that contain one or many seeds.
- 3 - Green vegetables contain chlorophyll, lutein, and zeaxanthin, which support retinal health and vision.
- 4 - Most people should add at least nine servings, or four and a half cups, of fruits and vegetables a day, excluding potatoes.
Topic Definition
- Fruits and Vegetables
Botanically, a fruit is the fleshy reproductive part of a plant - the ripened ovary that holds one or more seeds - such as an apple, orange, grape, or banana. A vegetable, in general terms, is a herbaceous plant or plant part regularly eaten as unsweetened or salted food. Both are cornerstones of a healthy diet, being naturally low in fat and calories, free of cholesterol, and rich in fiber, vitamins, minerals, antioxidants, and phytochemicals. Eating a wide range of them across the color spectrum - green, white, blue and purple, orange and yellow, and red - supplies a broad mix of nutrients linked to lower blood pressure, reduced risk of heart disease, stroke, and some cancers, and better eye and digestive health.
Overview
Botanically speaking, fruits are defined as fleshy reproductive organs of plants, the ripened ovaries containing one or many seeds, such as apples, oranges, grapes, strawberries, juniper berries and bananas.
Generally speaking, a vegetable is defined as a herbaceous plant or plant part which is regularly eaten as unsweetened or salted food by humans.
Most people should add at least nine servings (4 1/2 cups) of vegetables and fruits a day, excluding potatoes. Go for color and variety - dark green, white, yellow, orange, and red, (Color Wheel of Fruits and Vegetables), to give your body the mix of nutrients it needs.
Start adding more vegetables and fruits to your diet and reap the benefits. A diet rich in vegetables and fruits helps lower blood pressure, reduce risk of heart disease, stroke, and probably some cancers, lower risk of eye and digestive problems, and adds a mellowing effect on blood sugar that can help keep your appetite in check.
If you are not eating fresh fruit daily, you should be, as fresh fruit is essential in the diet. Fruits are low in calories, full of fiber, and packed with vitamins, minerals, antioxidants and phytochemicals. Fruit is full of water and has no cholesterol. Fruit is considered a healing food that helps your body fight diseases such as cardiovascular disease, high blood pressure, diabetes, and cancer.
Some vegetables can be consumed raw, some may be eaten raw or cooked, and some must be cooked to be edible. Vegetables are most often cooked in savory or salty dishes. However, a few vegetables are typically used in desserts and other sweet dishes, such as rhubarb pie and carrot cake.
Vegetables are eaten in a variety of ways, as part of main meals and as snacks. The nutritional content of vegetables varies considerably, though generally, they contain little protein or fat, and varying proportions of vitamins, provitamins, dietary minerals, fiber, and carbohydrates. Vegetables contain a great variety of other phytochemicals, some of which have been claimed to have antioxidant, antibacterial, antifungal, antiviral and anticarcinogenic properties.
Fruits and Veggies by Color
Green
Green vegetables contain chlorophyll, fiber, lutein, zeaxanthin, calcium, folate, vitamin C, and beta-carotene. Diets rich in these vegetables are linked to lower cancer risk and lower blood pressure and LDL cholesterol levels, and their nutrients normalize digestion time, support retinal health and vision, fight harmful free-radicals, and boost immune system activity.
White
Contain nutrients such as beta-glucans, EGCG, SDG, and lignans that provide powerful immune boosting activity. These nutrients also activate natural killer cells, B cells and T cells, reduce the risk of colon, breast, and prostate cancers, and balance hormone levels, reducing the risk of hormone-related cancers.
Blue/Purple
Contain nutrients which include lutein, zeaxanthin, resveratrol, vitamin C, fiber, flavonoids, ellagic acid, and quercetin. Similar to the previous nutrients, these nutrients support retinal health, lower LDL cholesterol, boost immune system activity, support healthy digestion, improve calcium and other mineral absorption, and fight inflammation; some of them have shown anti-cancer activity in laboratory studies.
Orange/Yellow
Contain beta-carotene, zeaxanthin, flavonoids, lycopene, potassium, and vitamin C. These nutrients reduce age-related macular degeneration and the risk of prostate cancer, lower LDL cholesterol and blood pressure, promote collagen formation and healthy joints, fight harmful free radicals, encourage alkaline balance, and work with magnesium and calcium to build healthy bones.
Red
Contain nutrients such as lycopene, ellagic acid, quercetin, and hesperidin, to name a few. Studies have linked these nutrients to a lower risk of prostate cancer and to lower blood pressure and LDL cholesterol levels, and they act as antioxidants.
Quick Facts
- Eating vegetables and fruits rich in potassium as part of an overall healthy diet may lower blood pressure, and may also reduce the risk of developing kidney stones and help to decrease bone loss.
- Fruits contain many antioxidants, such as polyphenolic flavonoids, vitamin C, and anthocyanins.
- Vegetable sources of potassium include sweet potatoes, white potatoes, white beans, tomato products (paste, sauce, and juice), beet greens, soybeans, lima beans, spinach, lentils, and kidney beans.
- Consumption of some dry fruits daily enhances the overall bioavailability of nutrients.
- Fruits provide nutrients vital for health and maintenance of your body.
- Vegetables are important sources of many nutrients, including potassium, dietary fiber, folate (folic acid), vitamin A, and vitamin C.
- It is recommended to eat at least 2-3 servings of fresh fruits every day.
- Dietary fiber from vegetables helps reduce blood cholesterol levels and may lower risk of heart disease.
- People who eat more fruits and vegetables as part of an overall healthy diet are likely to have a reduced risk of some chronic diseases.
- Most vegetables are naturally low in fat and calories. None have cholesterol. (Sauces or seasonings may add fat, calories, or cholesterol.)
- Eating a diet rich in some vegetables and fruits as part of an overall healthy diet may protect against certain types of cancers.
- Onions are high in vitamin C, a good source of fiber, and with only 45 calories per serving, add abundant flavor to a wide variety of food.
- Vegetables, like fruits, are low in calories and fats but contain good amounts of vitamins and minerals.
- Most fruits are naturally low in fat, sodium, and calories. None have cholesterol.
- As in fruits, vegetables too are home for many antioxidants.
- Eating foods such as fruits that are lower in calories per cup instead of some other higher-calorie food may be useful in helping to lower calorie intake.
- Fruits' health benefits come from their richness in vitamins, minerals, micronutrients and pigment antioxidants.
- Dietary fiber from fruits, as part of an overall healthy diet, helps reduce blood cholesterol levels and may lower risk of heart disease.
- Eat at least 5-7 servings of fresh vegetables every day.
Frequently Asked Questions
How many servings of fruits and vegetables should I eat daily?
Guidance suggests at least nine servings a day of combined fruits and vegetables, including 2 to 3 servings of fruit and 5 to 7 servings of vegetables.
Are frozen fruits and vegetables as healthy as fresh?
Frozen produce is often just as nutritious as fresh because it is picked ripe and frozen quickly, which helps preserve its vitamins and minerals.
Is it better to eat vegetables raw or cooked?
Both have benefits, as some nutrients are better absorbed after cooking while others are best raw, so a mix of both is a good approach.
Can eating fruit raise blood sugar too much?
Whole fruit contains fiber that slows sugar absorption, so it has a mellowing effect on blood sugar and fits well within a balanced diet.
Why should I eat fruits and vegetables of different colors?
Each color group provides different nutrients and antioxidants, so eating a range of colors gives your body a wider mix of health benefits.
Do fruits and vegetables contain cholesterol?
No, fruits and vegetables naturally contain no cholesterol, though added sauces or seasonings can introduce fat, calories, or cholesterol.
Which fruits and vegetables are highest in potassium?
Sweet potatoes, white potatoes, white beans, tomato products, spinach, lentils, and kidney beans are among the richest sources of potassium.
How should I wash fruits and vegetables?
Rinse produce under running water just before eating or cutting it, and scrub firm items such as potatoes and melons with a clean brush. Soap and special produce washes are not needed.
Curated and edited by Ian C. Langtree, Founder and Editor-in-Chief, Disabled World. This section is maintained by the Disabled World editorial team. Last updated: