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Lentils vs Soy: Difference & Similarities

This article explains the key similarities and differences between lentils and soy, foods from the legumes and legume product group. Read on to learn more about the lentils vs soy comparison.
Dennis Gillett, Health & Fitness Writer

Written by Dennis Gillett, Health & Fitness Writer. Updated on January 7, 2023.

Lentils and soy belong to the legumes and legume products food group, one of the staple food groups for people on a plant-based diet.

Legumes and most legume products are an affordable source of plant protein, dietary fiber, B vitamins, and minerals such as iron, calcium, potassium, and zinc, minerals that are usually harder to get on a plant-based diet.

This article will thoroughly compare lentils and soy and help you learn more about their similarities and differences.

Lentils

Lentils (Lens culinaris) are a type of legume that are native to the Middle East and have been consumed for thousands of years.

They are small, round, and come in various colors, including green, brown, red, and yellow. Lentils are a popular ingredient in many cuisines worldwide and are highly valued for their nutritional content.

One of the main health benefits of lentils is their high protein content. In fact, lentils are one of the highest plant-based protein sources, making them a popular choice for vegetarians and vegans.

Lentils are also high in fiber, which can help to improve digestion and lower cholesterol levels.

They are rich in nutrients such as iron, potassium, and B vitamins. They also contain many plant compounds that have been shown to have antioxidant and anti-inflammatory effects.

Regarding versatility, lentils can be easily incorporated into various dishes, such as soups, stews, and salads.

They are also budget-friendly ingredients that can be used in place of meat to add protein and nutrients to meals.

Lentils are an excellent source of Vitamin B1 (Thiamine), Vitamin B5 (Pantothenic acid), Vitamin B6 (Pyroxidine), and Vitamin B9 (Folate).

They also contain a good amount of Vitamin B2 (Riboflavin), and Vitamin B3 (Niacin) and some Vitamin C, and Vitamin K.

Soy

Soybeans (Glycine max) are a type of legume native to East Asia.

They are a popular ingredient in many vegan and vegetarian dishes due to their high protein and fiber content. Soy protein is one of the complete sources of a plant-based protein.

Soybeans can be enjoyed in a variety of dishes, including tofu, soy milk, and soy-based meat substitutes, and can also be ground into flour and used in baked goods such as bread and cookies.

In addition to being a tasty and nutritious food, soybeans have been shown to have many potential health benefits.

They are a good source of antioxidants and have been linked to lower cholesterol levels and improved blood sugar control.

Soybeans are also a good source of several important minerals, including iron, zinc, and magnesium.

Soy are an excellent source of Vitamin B1 (Thiamine), Vitamin B2 (Riboflavin), Vitamin B9 (Folate), and Vitamin K.

They also contain a good amount of Vitamin B3 (Niacin), Vitamin B5 (Pantothenic acid), and Vitamin B6 (Pyroxidine) and some Vitamin C, and Vitamin E.

Lentils vs Soy Nutrition

Now that we’ve described the origin, taste, and usage of these foods, we can move to the most interesting part – comparing lentils vs soy.

This comparison will start by comparing the caloric value of lentils and soy and their macronutrients and then go more in-depth by analyzing their vitamin and mineral content.

LentilsSoy
Energy352 kcal446 kcal
Carbs63.4 g30.2 g
Sugar2.03 g7.33 g
Fiber10.7 g9.3 g
Protein24.6 g36.5 g
Fat1.06 g19.9 g
Saturated Fat0.154 g2.88 g

Lentils vs Soy Calories

Most calories in raw legumes come from carbs. Peanuts are an exception here, but they are often considered a nut instead of a legume because of their nutritional profile.

Comparing lentils vs soy for weight loss, lentils are slightly lower in calories, with 352 calories per 100 grams, compared to 446 calories per 100 grams of soy.

However, both lentils and soy can and should be a part of a healthy diet, and neither one shouldn’t be avoided if you’re looking to lose weight.

Lentils vs Soy Protein

Legumes and most legume products, including lentils and soy, are important sources of plant-based protein.

Soy offer around 33% more protein than lentils.

Soy have 36.5 grams of protein per 100 grams, while lentils have 24.6 grams of protein per 100 grams.

Lentils vs Soy Carbs

Counting carbs can be important for some people for different reasons, including blood sugar control, weight management, or athletic performance.

It’s also important for people on a keto diet, so let’s compare the carbs content in lentils and soy.

The total amount of carbohydrates is around 52% higher in lentils than in soy. They have 63.4 grams per 100 grams, compared to 30.2 grams in soy.

There’s less sugar in lentils than in soy, 71% precisely.

One handful of lentils (28 grams) contains 0.6 grams of sugar, while the same amount of soy contains 2.1 grams.

Lastly, let’s take a look at the dietary fiber in lentils and soy.

Dietary fiber keeps the digestive system healthy and helps with weight management by promoting a sense of fullness.

With 3 grams of fiber per portion, lentils are a better source of fiber than soy which lentils offer 2.6 grams per portion.

Lentils vs Soy Fats

Like most other legumes, with the exception of lupins and peanuts, lentils and soy are low in fat.

Fats in lentils and soy are mostly healthy unsaturated fats. They are naturally cholesterol-free and trans-fat-free.

Total fat in lentils and soy:

  • Lentils: 1.1 grams per 100 grams
  • Soy: 19.9 per 100 grams

Speaking of saturated fats, lentils are 93% lower in saturated fats.

Lentils and soy contain 0.2 grams and 2.9 grams of saturated fat per 100 grams, respectively.

Lentils vs Soy Vitamins Content

This section will discuss the vitamin content of lentils and soy.

Vitamins are micronutrients, meaning we need only a small amount. However, they are very important for many processes in our bodies.

Lentils have a higher amount of vitamin C, vitamin B1 (Thiamine), vitamin B2 (Riboflavin), vitamin E, and vitamin K.

However, soy have a higher amount of vitamin A, vitamin B3 (Niacin), vitamin B5 (Pantothenic acid), vitamin B6 (Pyroxidine), and vitamin B9 (Folate).

Lentils and soy contain the same amount of vitamin D, and vitamin B12 (Cobalamin).

The following table shows the exact amount of vitamins lentils and soy contain side by side, so you can easily compare them.

LentilsSoy
Vitamin A39 IU22 IU
Vitamin C4.5 mg6 mg
Vitamin D00
Vitamin B1 (Thiamine)0.873 mg0.874 mg
Vitamin B2 (Riboflavin)0.211 mg0.87 mg
Vitamin B3 (Niacin)2.6 mg1.62 mg
Vitamin B5 (Pantothenic acid)2.14 mg0.793 mg
Vitamin B6 (Pyroxidine)0.54 mg0.377 mg
Vitamin B9 (Folate)479 µg375 µg
Vitamin B12 (Cobalamin)00
Vitamin E0.49 mg0.85 mg
Vitamin K5 µg47 µg

Lentils vs Soy Minerals Content

Minerals are important for our body to function properly. We need only a small amount of minerals, so they are called micronutrients.

Some minerals, like iron, calcium, zinc or, iodine, are relatively hard to get on a plant-based diet, so it’s important to choose your foods thoughtfully. This part of the lentils and soy comparison focuses on their mineral content.

Lentils are a better source of calcium, copper, fluoride, iron, magnesium, manganese, phosphorus, potassium, selenium, and zinc than soy.

On the other hand, soy are a higher amount of sodium.

Check out the table below to learn how lentils and soy compare when it comes to mineral content.

LentilsSoy
Calcium35 mg277 mg
Copper0.754 mg1.66 mg
Fluoride02.2 µg
Iron6.51 mg15.7 mg
Magnesium47 mg280 mg
Manganese1.39 mg2.52 mg
Phosphorus281 mg704 mg
Potassium677 mg1800 mg
Selenium0.1 µg17.8 µg
Sodium6 mg2 mg
Zinc3.27 mg4.89 mg

The Final Word

Lentils and soy are highly nutritious and a great addition to a plant-based diet.

Both lentils and soy are high in specific vitamins and minerals, and including them in your diet will give you the most benefits they offer.

Antioxidants found in beans and legumes can help to protect cells from damage and may reduce the risk of certain diseases and the effects of aging.

Additionally, the fiber and other nutrients in these foods can support the health of the digestive system and may even help to prevent certain digestive cancers.

Legumes are versatile food that can be incorporated into any meal of the day, including breakfast, lunch, or dinner. They can be served hot or cold, making them a convenient and tasty addition to a variety of dishes.

Sources

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