What Is Buckwheat? An Overview

While studying and living abroad, I often found myself reminiscing about one of my favorite childhood breakfasts — a warm bowl of buckwheat. At the time, buckwheat groats were hard to come by in local markets, and I’d share stories with friends about this hearty and nutty flavor staple I grew up loving.

Fast forward to today, the once humble cereal grains mostly known in parts of Asia and Eastern Europe have made their way into kitchens across the globe. From baked goods made from buckwheat flour to Japanese soba noodles and breakfast bowls, this versatile cereal grain is appearing in different products.

But what is buckwheat, exactly? Despite its name, it’s not related to wheat at all. It’s a naturally gluten-free pseudocereal — a seed that mimics grains in cooking and nutrition, often preferred by those with Celiac disease or those who generally avoid gluten.

With its rise in popularity, buckwheat has also gained attention for potential health benefits, with many claiming that these cereal grains may also contribute to the management of chronic conditions.

Read on to find out more about buckwheat groats and their nutritional characteristics and potential impact on health from a food science perspective.

Nutritional profile of buckwheat

TOC: Buckwheat’s nutritional profile

In food science, buckwheat is divided into common buckwheat and tartary buckwheat, the latter being more tolerant of rough environmental conditions, such as cold or drought. Buckwheat seeds are called groats, and depending on the type of buckwheat, climate, and other factors, their nutritional values may differ slightly.

Generally, buckwheat is considered a nutritious plant-based food with nutritional values higher than many other common grains, such as rice. Its composition includes carbohydrates, fiber, protein, minerals, and antioxidants.

Carbohydrates and blood sugar impact

The main type of available carbohydrate in buckwheat is starch, which varies from 60–70% in buckwheat groats. Generally, a cup of cooked buckwheat contains around 33 g of total carbohydrates, similar to white rice, but lower compared to whole-grain wheat flour, which may contain around 89 g per cup.

One of the unique properties of buckwheat is that these cereal grains contain naturally occurring carbohydrate-related compounds. Some of those include D-chiro-inositol and fagopyritol found in tartary buckwheat, which draw scientific interest within the research community.

Some research has proposed that D-chiro-inositol and fagopyritol may contribute to blood sugar level management and may have other health benefits, playing a role in the management of PCOS, obesity, and even bone health.

However, most of those proposed health benefits come from animal studies and provide contradictory results, and the exact mechanisms behind the potential health effects remain unclear. Thus, thinking that buckwheat may ‘magically’ improve all health-related parameters may not be the best reason for choosing these cereal grains over other common cereal grains.

On the other hand, what is known about these pseudocreals is that they have a lower glycemic index. A lower glycemic index means that after consuming buckwheat, it may cause a slower rise in blood sugar, the same way some other whole grains may. This is why buckwheat may be a smart option to include in your daily meals if you aim to manage your blood sugar control.

Fiber content and overall health

It is well-known that fiber plays a role in digestive health. It may contribute to gut health support, both in terms of feeding beneficial bacteria when consumed in adequate amounts and supporting proper bowel movements. However, fiber may also contribute to other health benefits.

Adequate dietary fiber intake may also support heart health when consumed alongside other healthy dietary and lifestyle practices. Some studies show that adequate dietary fiber intake from various food sources like whole grains, vegetables, and fruits may contribute to cardiovascular disease prevention due to its ability to play a role in supporting lower blood pressure.

Of course, it’s important to understand that blood pressure management and overall heart health require multifactorial approaches in diet, sometimes certain medication use, depending on the doctor’s advice, and certain lifestyle changes.

Moreover, it is noted that a consistent, adequate intake of dietary fiber may contribute to blood sugar management in some people. Some animal studies and theoretical approaches also highlight the possibility of dietary fiber playing a role in the prevention of colon cancer by supporting overall gut health, however, such potential benefits need further in-depth research to be validated.

Dietary Guidelines for Americans suggest the daily intake of dietary fiber to be around 14 g per 1,000 kcal per day. In a standard 2,000 kcal diet, this would equate to around 28 g of dietary fiber.

Buckwheat groats can be considered a decent source of dietary fiber, containing around 5 g of dietary fiber per cup. Buckwheat contains both insoluble and soluble fiber. A big portion of dietary fiber in buckwheat is attributed to resistant starch, which may contribute to certain metabolic health and gut microbiome support.

Protein quality

Overall protein quality describes how well a protein in a certain food product meets the body’s needs for essential amino acids and how efficiently the body can digest, absorb, and use the protein.

Protein content in buckwheat

Dietary guidelines suggest that the daily intake of protein for most healthy people should be anywhere between 10–35% of daily calorie intake. In a standard 2,000 kcal diet, on average, people should consume around 46 g of protein per day.

The protein content in buckwheat is relatively lower than in other common plant food sources, such as legumes. However, the amount of protein may vary depending on the specific type of buckwheat and even the climate conditions.

The protein content of cooked buckwheat groats per cup (6 oz/168 g) is around 6 g. Meanwhile, protein content in common plant-based protein sources such as canned beans may reach up to 13 g per cup, or in the case of cooked lentils, even more, around 18 g per cup.

However, if we compare buckwheat with more common grains rather than legumes, buckwheat tends to have higher protein content per cup. For example, a cup of cooked white rice may contain around 4 g of protein.

I always try to remind people that while buckwheat may contribute to daily protein intake to some extent, it may not be chosen for its high protein content in order to meet the dietary guidelines, especially when compared to other plant-based protein sources such as beans or lentils. But, it can be a great addition to an overall balanced diet when combined with other healthy foods.

Buckwheat protein digestibility

Buckwheat has a diverse amino acid profile, including some essential amino acids similar to that found in rice. Buckwheat contains a good amount of the amino acids lysine and phenylalanine but also contains other amino acids in smaller amounts.

On the other hand, the quality of the protein is best described by its digestibility. Buckwheat is considered to have a lower protein digestibility due to so-called ‘antinutrients’ such as tannins and proteases.

Is buckwheat gluten-free?

Many people are curious whether buckwheat is gluten-free and could be a suitable addition to a gluten-free diet.

In his YouTube video, Dr. Matt Angove says: “Considering that this grain contains the word wheat, you may think otherwise, but in fact, buckwheat is gluten-free. Interestingly, it was highly used in the United States until the late 1800s, but unfortunately, with time, wheat, corn, and soy became the favored crops in agriculture.”

The short answer is yes — buckwheat contains a low amount of prolamins and lacks gluten. This is why it can be used for developing gluten-free food products or used by those following a gluten-free diet, like people with gluten sensitivity or gluten intolerance.

Vitamins and minerals

Buckwheat contains a wide range of essential minerals and vitamins for overall health support. For minerals, it has:

• Phosphorus
• Potassium
• Magnesium
• Calcium

Buckwheat also contains some levels of vitamins, such as:

• Vitamin A
• Vitamin E
• B complex vitamins like niacin (B3), riboflavin (B2), and pantothenic acid (B5)
• Vitamin C

These essential micronutrients play a role in multiple body functions every day. For example, magnesium and calcium support bone health. Meanwhile, vitamin E, certain B vitamins, and vitamin C may contribute to immune system function, among other body functions.

It’s worth noting that consuming buckwheat usually involves some level of processing, both before it reaches your kitchen cabinets. For example, much of the common buckwheat found in stores may be roasted, or we process it at home by cooking.

These processing techniques may reduce certain vitamin content, especially from the B vitamin complex or vitamin C. With that being said, certain vitamin and mineral amounts naturally found in buckwheat may vary greatly depending on the cereal grain type and processing methods.

Antioxidants and plant compounds

Apart from vitamins and minerals, other nutrients and plant compounds can be found in buckwheat groats. These compounds are suggested to have antioxidant properties, contributing to anti-inflammatory processes in the body.

Buckwheat contains different phytonutrients, including flavonoids and phenolic acids. Generally, the flavonoid content tends to be higher in tartary buckwheat (40 mg/g) compared to common buckwheat.

The most common antioxidant compounds found in buckwheat are:

• Rutin
• Quercetin
• Phenolic acids like gallic, ferulic, vanillic, and others

Due to these antioxidants naturally found in buckwheat groats, it is hypothesized that these cereal grains may have ‘antiallergic’ properties; however, these potential benefits are not yet fully explored in clinical research.

On the other hand, it is known that antioxidants may contribute to immune system support by contributing to the management of free radicals.

Caloric and fat content

Like any other food product, buckwheat contains some calories. These cereal grains can be considered to be lower in calories compared to more common grain products. For example, a cup of cooked buckwheat may contain around 155 kcal, while a cup of cooked whole-grain wheat pasta may contain up to 240 kcal and more, depending on the pasta type.

Because of the lower calorie content and due to dietary fiber, buckwheat may contribute to satiety while also working perfectly for those who are watching their daily calorie intake.

Buckwheat is also naturally low in dietary fat, like other common cereal grains. A cup of buckwheat provides only around 1 g of total fat, which is excellent for those who limit their daily fat intake.

Final thoughts

Buckwheat is a versatile pseudocereal that may offer a variety of potential nutritional benefits when included as part of a balanced diet. While often grouped with whole grains in culinary use, it differs from common grains in its protein structure and other plant-based compounds.

Although the proposed health benefits found online may sound quite optimistic at times, buckwheat can still be a great addition to an overall diet to support your daily nutritional needs and goals.