While the difference is small, tart varieties like Granny Smith and popular types like Fuji and Honeycrisp often rank high in fiber, with most of the fiber concentrated in the skin; eating the apple whole provides the most, especially insoluble fiber, which aids digestion.
Next we have Kissabel apples which contain the most amphyanines. These compounds give the apples their red colored flesh and can help to increase levels of beneficial bacteria in the gut. Finally, Granny Smith is the variety that's lowest in fructose sugar but highest in soluble fiber.
Passion fruit generally has the most fiber per cup, with around 25 grams, followed by berries like raspberries and blackberries, which offer about 8 grams per cup, and then avocados and guavas with roughly 9 grams per cup. Other excellent choices include pears (with skin), kiwi, and figs, with many fruits providing 3-5 grams of fiber per serving.
While there's not much of a dramatic difference in apples as related to their color, different varieties of apples can address different nutritional needs. Green apples are "lower in sugar and high in fiber," Lindsay-Adler said, meaning they're "a good choice for those monitoring their sugar intake."
Nutritionally, apples and bananas are similar, but apples have slightly more fiber than bananas: Apple: 4 g of fiber1. Banana: 3 g of fiber2.
Nutritionists say it is OK to eat one to two apples per day as part of a balanced diet. But if a person is not used to eating fiber, more than two apples a day could cause unpleasant side effects.
While there's no single "number 1" healthiest fruit, blueberries are consistently ranked at the top for their exceptional antioxidant power (anthocyanins), supporting brain health, heart function, and potentially reducing inflammation and risk of chronic diseases like type 2 diabetes and heart disease. Other top contenders include avocados for healthy fats and fiber, raspberries for fiber, and pomegranates for antioxidants, but blueberries often stand out as a top choice.
Apples are high in insoluble fiber in the peel and insoluble fiber in the flesh. They are also high in pectin, so in addition to the fiber, both improve bowel function and motility.
The Red Delicious is your best bet if you're looking for a red apple with deep red skin. This classic variety has a higher antioxidant count than other apples. Go, health!
Insoluble fiber.
So it can be helpful for people who have constipation or don't regularly pass stool. Some good sources of insoluble fiber are whole-wheat flour, wheat bran, nuts, beans, and vegetables such as cauliflower, green beans and potatoes.
According to FDA nutrition data, passion fruit, avocados, and berries are the fruits with the most fiber per cup. For instance, blackberries and raspberries have 8 grams of fiber per cup. Comparatively, one medium pear has 5 grams of fiber, and a medium apple with the skin has 4 grams of fiber.
Green apples also have lower calories and a higher fiber content than red apples, especially in the form of pectin. This soluble fiber acts as a prebiotic, helping break down foods, nourishing your gut's beneficial bacteria, and promoting a healthier gut environment.
A diet low in fibre has been linked to:
Eating apples in the morning helps with regular bowel movements. Eating apples before meals can make you feel fuller and help with weight loss. Avoid eating apples right before bed as they can cause gas or bloating.
How do I increase my fiber intake?
High-fiber drinks are typically homemade smoothies with whole fruits, vegetables, oats, seeds (chia/flax), or fiber powders mixed in, but you can also find commercial options like V8 High Fiber, prebiotic sodas (Olipop, The Gut Stuff), prune juice, or fortified nutrition shakes (Sustagen). For maximum fiber, smoothies blended with the whole plant matter are best, while juices offer less fiber unless enriched.
Chia seeds
This edible, Mexico-grown seed has protein, antioxidants, calcium, and healthy omega-3 fatty acids. One ounce delivers about ten grams of fiber, according to the U.S. Department of Agriculture (USDA), more than double the amount found in a cup of broccoli.
Apples and Pears
Containing high levels of fibre, fructose and sorbitol, apples and pears are popular fruits that help you to empty your bowels. Also, apples and pears contain high levels of water content, which helps with digestion and with avoiding constipation.
To empty your bowels every morning, establish a routine with a hot drink, a high-fiber breakfast (fruits, whole grains, beans), and light activity, as these stimulate natural gut movements (gastrocolic reflex). Key foods include prunes, kiwi, oats, and leafy greens, while hydration and exercise are crucial for smooth, regular bowel function.
Experts recommend drinking 6–8 glasses of warm water daily to cleanse the colon. Additionally, you should consume water-rich foods like watermelon, tomatoes, lettuce, and celery. Many foods can naturally cleanse the colon through diet without the need for laxatives.
The highest fiber vegetables include artichokes, green peas, Brussels sprouts, broccoli, kale, sweet potatoes, carrots, and leafy greens like collard greens, often with the skin on for potatoes for maximum benefit, providing excellent sources of fiber for digestive and overall health. Legumes like beans are also fiber powerhouses, though often categorized separately.