Leena Watts
Grains are the edible seeds of plants called cereals, including rice, corn, and wheat. They are a good source of nutrients such as complex carbohydrates, dietary fiber, several B vitamins, and minerals like iron, magnesium, and selenium. Whole grains, in particular, are linked to numerous health benefits and are considered very nutritious. They can improve gut health, protect your heart, and may even reduce your risk of certain cancers. Eating whole grains can also support healthy digestion and reduce the risk of heart disease, stroke, and diabetes. For these reasons, whole grains are an important part of a balanced diet.
| Characteristics | Values |
|---|---|
| Nutritional Benefits | Whole grains are high in fiber and have been linked to health benefits, such as lower risks of heart disease, colorectal cancer, and type 2 diabetes. They are also good sources of dietary fiber, complex carbohydrates, vitamins (B vitamins, thiamin, riboflavin, niacin, folate, and folic acid), and minerals (iron, magnesium, and selenium). |
| Positive Impact on Health | Whole grains can improve gut health, protect your heart, and reduce the risk of certain diseases and cancers. They are also recommended for pregnant women to prevent neural tube defects. |
| Types of Grains | Whole grains include wheat, rice, oats, cornmeal, barley, and other cereal grains. Bread, pasta, breakfast cereals, grits, tortillas, oatmeal, and popcorn are examples of whole-grain products. |
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What You'll Learn
- Whole grains reduce the risk of heart disease, diabetes and certain cancers
- They are a source of dietary fibre, which supports healthy digestion
- Whole grains are rich in vitamins and minerals, including B vitamins, iron, magnesium and selenium
- They can help with weight loss by making you feel full
- Eating grains during pregnancy helps prevent neural tube defects
Whole grains reduce the risk of heart disease, diabetes and certain cancers
Whole grains are typically discussed in the context of health benefits, whereas refined grains are often attributed to negative health effects. Whole grains are high in resistant carbohydrates, fiber, nutrients, and bound antioxidants. They are also a good source of phytochemicals, which are known to prevent type-2 diabetes.
Several studies have found a link between whole grain consumption and a reduced risk of heart disease. Whole grains have been associated with improved cardiovascular outcomes and reduced serum low-density lipoprotein cholesterol and blood pressure. They also improve glucose and insulin responses.
In terms of diabetes, whole grains have been promoted as beneficial to its prevention. A meta-analysis of prospective cohort studies found that a 50g/day whole grain intake reduced the risk of type 2 diabetes. Whole grains were found to significantly reduce fasting blood glucose.
Observational population studies have also linked high dietary fiber consumption with a reduced risk of colorectal cancer. Whole grains are a dietary choice that probably protects against colorectal cancer, with a 17% risk reduction associated with three standard servings (90 grams) per day. Limited evidence from controlled trials and observational population studies also suggests that whole grains may lower the risk of other cancers by reducing inflammation and insulin resistance.
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They are a source of dietary fibre, which supports healthy digestion
Whole grains are an essential part of a healthy diet, offering a range of health benefits. One of the key reasons to include grains in your diet is that they are a source of dietary fibre, which is crucial for supporting healthy digestion.
Dietary fibre is a type of carbohydrate that cannot be broken down and absorbed by the small intestine. Instead, it reaches the large intestine, where it promotes the growth of beneficial bacteria and supports regular bowel function. Fibre also helps to reduce blood cholesterol levels, which can lower the risk of heart disease.
Whole grains, such as wheat, rice, corn, oats, and barley, are excellent sources of dietary fibre. When consuming grains, it is important to choose whole grains over refined grains, as the refining process removes the bran and germ, which are rich sources of fibre and other essential nutrients. Examples of refined grains include white flour, white pasta, and white rice, which have a finer texture and a longer shelf life but lack the nutritional benefits of their whole-grain counterparts.
By incorporating whole grains into your diet, you can increase your fibre intake, which has numerous positive effects on your health. Fibre not only supports healthy digestion but also helps maintain a healthy weight by promoting a feeling of fullness, reducing calorie intake, and lowering the risk of obesity. Additionally, fibre can help improve blood cholesterol levels and reduce the risk of heart disease, stroke, and type 2 diabetes.
Including grains in your diet, especially whole grains, can provide a good source of dietary fibre, supporting healthy digestion and promoting overall health and well-being.
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Whole grains are rich in vitamins and minerals, including B vitamins, iron, magnesium and selenium
Grains are the edible seeds of plants called cereals, including rice, corn, and wheat. They are typically divided into two subgroups: whole grains and refined grains. Whole grains are linked to numerous health benefits and are considered very nutritious, whereas refined grains are often attributed to negative health effects. Whole grains are a good source of dietary fibre and contain several vitamins and minerals, including B vitamins, iron, magnesium, and selenium.
B vitamins, including thiamin (B1), riboflavin (B2), niacin (B3), and folate (B9), are essential for a variety of body functions. They play a key role in metabolism by helping the body release energy from protein, fat, and carbohydrates. B vitamins are also critical for a healthy nervous system and can help prevent neural tube defects during pregnancy. Iron, another nutrient found in whole grains, is used to carry oxygen in the blood. It is especially important for teenage girls and women in their childbearing years, who are at risk of iron-deficiency anaemia. Magnesium, also present in whole grains, is a mineral that helps build bones and release energy from muscles. Selenium, another mineral found in whole grains, protects cells from oxidation and supports a healthy immune system.
The bran, germ, and endosperm are the three components of whole grains. The bran is the outer layer that is rich in B vitamins, iron, magnesium, and antioxidants. The germ, or core of the seed, contains healthy fats, vitamin E, B vitamins, and phytochemicals. The endosperm, the interior layer, holds carbohydrates, protein, and small amounts of B vitamins and minerals. Together, these components provide various health benefits. For example, the bran and fibre in whole grains can help slow the breakdown of starch into glucose, maintaining steady blood sugar levels and reducing the risk of heart disease. Phytochemicals and minerals like magnesium, selenium, and copper may also protect against disease.
Overall, whole grains are a nutritious food group that can provide many health benefits due to their rich vitamin and mineral content. However, it is important to note that individual dietary needs may vary, and some people may need to avoid gluten, which is present in certain grains. As such, it is always advisable to consult a healthcare professional or registered dietitian before making any significant dietary changes.
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They can help with weight loss by making you feel full
Grains are the edible seeds of plants called cereals, including rice, corn, and wheat. They are a staple food in most countries and have played a major role in human history. Whole grains, in particular, are linked to numerous health benefits and are considered very nutritious. They are a good source of dietary fibre, which can help improve blood cholesterol levels and lower the risk of heart disease, stroke, obesity, and even type 2 diabetes.
Whole grains can help with weight loss by making you feel full for longer. The fibre in whole grains increases absorption time in the digestive tract, reducing hunger and increasing satiety, leading to a decreased calorie intake. This feeling of fullness can help prevent overeating and is one of the reasons high-fibre diets are recommended for weight loss.
Some examples of whole grains include whole wheat, whole corn, oats, brown rice, and quinoa. These can be incorporated into meals in various ways, such as choosing whole-wheat pasta, bread, and tortillas, or having oatmeal or porridge for breakfast.
In addition to fibre, whole grains provide many other essential nutrients, including B vitamins, iron, magnesium, selenium, and zinc. These nutrients are vital for various body functions, such as forming new cells, carrying oxygen in the blood, and maintaining a healthy immune system.
While whole grains offer numerous health benefits, it is important to note that the overall quality of your diet matters more than any one food or food group. The amount and type of grains consumed should be considered in the context of individual needs and dietary restrictions.
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Eating grains during pregnancy helps prevent neural tube defects
Eating grains is essential for a balanced diet during pregnancy. Whole grains are packed with vitamins, minerals, and fiber, which are crucial for the development of the baby and the mother's health.
Grains are a good source of B vitamins, including folic acid or folate, which helps prevent neural tube defects (NTDs) in the developing fetus. NTDs are debilitating birth defects that affect the brain, spine, or spinal cord, and they occur within the first month of pregnancy, often before a woman even knows she is pregnant. Folic acid supplementation in early pregnancy has been shown to reduce the risk of NTDs, and grains fortified with folic acid can be a viable strategy to achieve adequate folate intake.
Whole grains such as oatmeal, brown rice, whole wheat, oats, barley, corn, and rye are excellent sources of folic acid and other nutrients. They also provide fiber, which helps prevent constipation and hemorrhoids, common issues during pregnancy.
To ensure a sufficient intake of folic acid and other nutrients, pregnant women should aim to make at least half of their daily grain consumption whole grains. This can include whole grain pasta, bread, and crackers, as well as oatmeal and buckwheat for breakfast.
In addition to grains, pregnant women should also consume other folate-rich foods, such as spinach, okra, beans, and lentils, to promote healthy neural tube development and reduce the risk of NTDs.
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Frequently asked questions
Grains are the edible seeds of plants called cereals, including rice, corn, and wheat.
Grains, especially whole grains, are linked to numerous health benefits. They are a good source of dietary fiber, which can help lower the risk of heart disease, improve digestion, and reduce the risk of certain cancers. They are also a source of complex carbohydrates, several B vitamins, and minerals such as iron, magnesium, and selenium.
Examples of whole grains include oatmeal, whole-wheat bread, pasta, crackers, flour, popcorn, corn, and rice (except white rice).
Refined grains have been milled or ground, which removes the outer layers of bran and germ, improving shelf life but stripping the grain of important nutrients like dietary fiber, B vitamins, and iron. Examples include white flour, white pasta, and white rice.
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