How Eating Fiber Can Help You Lose Weight

Is Fiber Good for Weight Loss?

Eating more fiber can help you lose weight, even if you don't make other changes to your diet. Fiber is super-filling. You digest it more slowly than simple starches and sugars.

Dietary fiber, also known as roughage, is the indigestible part of plant foods. Fiber has health benefits, including reducing the risk of type 2 diabetes and heart disease.

Fiber is mostly in vegetables, fruits, whole grains, and legumes. There are 2 types of fiber: soluble and insoluble, and both play important roles in health:

Insoluble fiber does not dissolve in water and adds bulk to the stool, preventing constipation.

Soluble fiber absorbs water, forming a gel-like substance in the digestive system. Soluble fiber may help lower cholesterol levels and help regulate blood sugar levels.

Basic Facts of Fiber

Fiber is a nutrient in food that your body cannot digest. Fiber is found only in plant-based foods, and not in animal products such as milk and other dairy products,  meat, fish, and eggs. Fiber content is higher when the food is less processed, so an unpeeled apple has more fiber than a peeled one, an orange has more fiber than orange juice, and a whole grain has more fiber than a refined one.

These foods have fiber.

Whole grains

Non-starchy vegetables.

Nuts, peanuts, and seeds.

Starchy vegetables, such as potatoes, sweet potatoes, corn, and peas.

Legumes, or beans, split and blackeyed peas, and lentils.

Types of dietary fiber

Fiber includes nonstarch polysaccharides, such as cellulose, dextrins, lignin, waxes,, inulin,  pectins, beta-glucans,  and oligosaccharides.

Soluble and insoluble are the 2 types of dietary fiber.

Most high fiber containing foods have both insoluble and soluble fiber, so people do not need to think much about the difference. Instead, they can focus on overall fiber intake.

Insoluble fiber

Insoluble fiber does not dissolve in water and passes through the gastrointestinal tract, mostly intact. It does not provide calories.

Insoluble fiber helps build bulk in the stool, helping you pass stool more quickly. It can also help prevent constipation.

Good sources of insoluble fiber include:

fruits

whole grain foods

nuts

vegetables

Soluble fiber

Soluble fiber dissolves in water and forms a gel-like substance in the stomach. Bacteria later break the gel down in the large intestine. Soluble fiber provides some calories to the individual.

Soluble fiber provides the following benefits:

lowering LDL cholesterol in the blood by affecting how the body absorbs dietary fat and cholesterol

slowing absorption of other carbohydrates through digestion, which can help regulate blood sugar levels

Good sources of soluble fiber include:

beans

nuts

vegetables

fruits

oats

Does Fiber Help You Lose Weight?

Some research say that fiber may help with weight loss. People who eat more fiber tend to have lower body weights and less adult weight gain than people with lower-fiber diets. Fiber may increase feelings of fullness so you eat less food. That can lead to weight loss because losing weight is about consuming (taking in) fewer calories than you use.

Fiber may also help you eat less because of its effects on blood sugar. After you eat a meal, your blood sugar increases and then decreases back to normal blood sugar levels or below. When post-meal spikes are higher, the post-spike dips are lower. The low dips can lead to hunger and sugar cravings. Fiber makes blood sugar swings smaller, which means the post-spike dips are not as low. That means hunger and cravings are less, so you are likely to eat less and to choose less sugary foods than when you do not have fiber.

How are fiber and weight loss related?

Fiber is a non-negotiable part of living a healthy life, whether you want to lose weight or not. Fiber adds bulk to your diet, a key factor in both losing weight and maintaining [a healthy one].

That extra volume can help you feel satisfied sooner, and since fiber stays in your system longer than many other nutrients, it can also help you feel fuller longer, she explains.

Fiber offers a few other weight-related bonuses.  High-fiber foods such as fruits and vegetables tend to be low in calories. The nutrient also helps regulate your blood sugar, which is part of why refined carbohydrates like cookies that have had a lot of fiber removed can lead to intense blood sugar spikes.

Fiber may also help sort out your gut microbiome, or the collection of bacteria that keeps your stomach healthy and could be related to your weight. The makeup of gut bacteria can play an important role in weight management. Generally speaking, soluble fiber is fermented by gut bacteria, though some insoluble fiber can be fermented, too—and promotes the growth and maintenance of beneficial gut bacteria.

Give fiber a slot high up on your list of nutritional priorities, regardless of whether you want to lose weight or not. Just remember to drink enough water throughout the day, and you should be golden.

Soluble Fiber Helps Reduce Appetite

Soluble fiber is a powerful natural appetite suppressant,. Soluble fiber can help you to lose weight. By suppressing your appetite, you are more likely to reduce your calorie intake, which can help you lose weight.

There are several theories about how soluble fiber can help reduce your appetite.

Soluble fiber helps regulate hormones involved in appetite control.

Eating soluble fiber reduces the levels of hunger hormones produced by the body, including ghrelin.

Others have shown that soluble fiber increases the production of hormones that make you feel full, such as cholecystokinin, GLP-1 and peptide YY.

When nutrients like glucose are released slowly into the gut, your body releases insulin at a slower rate. This is linked to a reduced sense of hunger.

The health benefits of Soluble Fiber

Foods rich in this type of fiber include beans, apples, oatmeal, nuts,  and blueberries.

The health benefits of Soluble Fiberinclude:

Weight loss:

Soluble fiber can also help you get to -- or stay at -- a healthy weight by keeping you feeling full without adding many calories to your diet.

Diabetes protection:

Because soluble fiber isn’t well absorbed, it doesn't contribute to the blood sugar spikes that can put you at risk for type 2 diabetes and heart disease. If you already have diabetes (either type 1 or type 2) soluble fiber can even help keep your condition under control.

Heart protection:

Inside your digestive system, soluble fiber attaches to cholesterol particles and takes them out of the body, helping to reduce overall cholesterol levels and the risk of heart disease. Oatmeal may offer the most heart protection.

Healthy bowel movements:

Soluble fiber soaks up water as it passes through your system, which helps bulk up your stool and guard against constipation and diarrhea. In fact, most fiber supplements contain mostly soluble fiber.

Sources of Soluble Fiber

Soluble fiber is easy to add to your diet and found in a variety of plant-based foods.

Foods that are high in soluble fiber include sweet potatoes,, fruits like apricots and oranges, Brussels sprouts, legumes and grains like oatmeal.

However, although soluble fiber may help you lose weight, it's not a great idea to eat lots of soluble fiber right away.

This can cause side effects, such as stomach cramps, diarrhea and bloating. It's best to increase your intake slowly, over time, to help improve your body's tolerance.

As far as recommended daily intake goes, the US Department of Agriculture recommends that men aim to consume 30–38 grams of fiber per day, while women should aim for 21–25 grams per day.

When increasing the fiber content of your diet, it is best to take it slow. Add just a few grams at a time to allow the intestinal tract to adjust; otherwise, abdominal cramps, gas, bloating, and diarrhea or constipation may result. Another way to help minimize these effects is by drinking at least 2 liters (8 cups) of fluid daily.

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