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What is starch? Types, benefits, risks and more

Starch is a complex carbohydrate. When people hear the word “starch,” they may think of carbohydrate-rich foods, such as potatoes, rice, and pasta. However, most plants store energy in the form of starch, including fruits and vegetables.

Starches are the main source of carbohydrates for most people. They play a crucial role in a nutritious and balanced diet, as they provide the body with glucose, which is the main source of energy for every cell. They also provide a range of vitamins, minerals, fiber and other nutrients.

Starchy foods are also valuable ingredients in the kitchen because they can thicken soups and sauces without adding fat.

Keep reading to learn more about starch, including the types, health benefits, and risks of overeating starches.

Starch, or amylum, is a complex carbohydrate found in many foods, including grains, vegetables, and fruits. the main sources of starch are:

Extracting pure starch from food produces a white, tasteless, odorless powder that does not dissolve in cold water or alcohol.

Starch is a natural polymer, or polysaccharide, which means it is a long chain comprising one type of molecule. Starch is made up of glucose molecules. It can come in two forms: amylose and amylopectin.

Amylose is a linear or linear polymer that scientists describe as amorphous or solid. Amylopectin forms a branched chain and is crystalline.

Different plants contain varying proportions of these polysaccharide units. However, amyloidosis generally constitutes a maximum of 30% starch, the remainder being amylopectin.

Plants create these starch polymers to store the glucose they create during photosynthesis. For this reason, starchy foods are good sources of energy.

When a person eats foods containing starch, the body breaks down the natural polymers into glucose units, which provide energy throughout the body.

In addition to being part of a nutritious diet, various industries – including pharmaceutical, paper and food – use starch in their manufacturing processes.

Depending on his nutritional characteristicsstarch belongs to one of the following three groups:

  • Rapidly digestible starch (RDS): This form of starch exists in cooked foods, such as potatoes and bread. The body quickly converts it into glucose.
  • Slow-digesting starch (SDS): This starch has a complex structure, which means that the body breaks it down slowly. It exists in cereal grains.
  • Resistant Starch (RS): The body cannot easily digest this form of starch, and it can pass through the digestive system unaffected, like dietary fiber. It may promote healthy gut microflora. Experts further divide SR into four categories, including:
    • RS1, which exists in grains, seeds and beans.
    • RS2 from raw potatoes and unripe bananas.
    • RS3 foods that undergo cooking and then cooling, such as rice and cornflakes.
    • RS4, which is in the bread.

Any given type of food may contain different types of these starches.

People can buy different forms of starch to use in cooking, including:

  • Potato: Raw and mashed potatoes are the source of potato starch. The liquid starch dries to form a white, flour-like powder. It is gluten-free and appears in various recipes as an alternative to wheat flour.
  • Tapioca: This versatile flour comes from the crushed pulp of the cassava root. People can mix it into baked goods or use it as a thickening agent for soups, stews, and sauces.
  • But: This starch comes from corn grain. It can thicken recipes and serves as a base for corn syrup. Doctors also use it to supply glucose people with glycogen storage disease.

In addition, modified starch exists, which is a derivative of starch that manufacturers have processed to modify its properties. The baking industry uses this form of starch extensively because it can tolerate a range of conditions, including extreme heat or cold.

Doctors recommend eating plenty of starchy foods as part of a balanced diet to provide energy and fiber, as well as to increase feelings of fullness.


Starch is the The most important source of energy for humans. The body digests starch by metabolizing it into glucose, which passes into the bloodstream and circulates around the body. Glucose fuels virtually every cell, tissue, and organ in the body. If there is excess glucose, the liver stores it as glycogen.

Glucose is essential for brain function. The adult brain is responsible for 20–25% the body’s glucose consumption.

Learn more about energy-dense foods here.


Dietary fiber is a indigestible carbohydrates which only exists in foods of plant origin. Starchy foods, such as corn, beets, potatoes, beans, fruits, and whole grains, are abundant sources of fiber. Although the body does not digest fiber, this carbohydrate is an essential part of a nutritious diet.

Nutritionists divide fiber into soluble and insoluble forms. Fruits and vegetables are sources of soluble fiber capable of absorbing water. Soluble fiber feeds the good bacteria in the gut, helps slow digestion and softens stools.

Insoluble fiber does not absorb water. Instead, it passes through the digestive system, adding bulk to maintain regular bowel movements and prevent constipation. Whole grain foods, nuts, seeds, and leafy green vegetables are good sources of insoluble fiber.

According to the Food and Drug Administration (FDA), most people in the United States do not eat enough fiber. Government guidelines to suggest that adult women need up to 28 grams (g) of fiber per day while adult men need up to 34 g.

Learn more about high fiber foods here.


Eating starchy foods can help increase satiety, which is the feeling of being full after eating.

Research shows that eating foods high in resistant starch helps people feel full. These foods may also improve insulin sensitivity and reduce fat storage. Additionally, eating fibrous foods high in resistant starch can help people maintain a moderate weight.

In a small study 2018, researchers offered participants breakfast and lunch with either 48 g of resistant starch or a placebo. Participants were then allowed to eat as much as they wanted at dinner. Researchers found that consuming resistant starch at breakfast and lunch significantly reduced participants’ energy intake at the latter meal.

Learn more about foods that can improve feelings of fullness.

For most individuals, starch poses no risks or side effects. Nutrition guidelines recommend that people have a balanced diet that includes starchy foods.

However, people with certain health conditions, including diabetes and congenital sucrase-isomaltase deficiency (CSID), should moderate their starch intake.

The American Diabetes Association recommends that people with type 1 diabetes count the number of grams of carbohydrates they eat and then balance that with their insulin dose. People with type 2 diabetes should avoid consuming large amounts of carbohydrates in one sitting and distribute them evenly throughout the day.

People with CSID will need to follow a special diet. People with this genetic condition cannot digest certain sugars, so they will have digestive problems if they eat certain fruits, juices and grains. These problems can lead to malnutrition.

Starch is a carbohydrate and a natural component of most plants, including fruits, vegetables and grains. Starches are an essential part of a balanced diet, as they provide energy, fiber and a feeling of satiety.

The body breaks down starch molecules into glucose, which is the body’s main fuel source. The brain, in particular, needs a considerable amount of glucose every day.

Starches are safe for most people and have no risks or side effects. However, it is important for people with diabetes or CSID to carefully consider their starch intake.