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Oat Milk vs Soy Milk: Find Out Which One Reigns Supreme

Written by: Edward Haugh

Last updated on

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Time to read 17 min

In the ever-expanding world of plant-based milk alternatives, two contenders have risen to the top: oat milk vs soy milk . We're checking into the creamy depths of these popular dairy-free options to help you make an informed choice for your next latte or breakfast cereal.

Oat milk, with its naturally sweet flavor and velvety texture, has surged in popularity recently. Meanwhile, soy milk, the OG of plant-based milks, continues to hold its ground with its impressive nutritional profile. We'll see how these two stack up in taste, nutrition, environmental impact, and more. Whether you're lactose intolerant, vegan, or simply curious about plant-based alternatives, we've got you covered. Let's pour into the details and see which milk might be your perfect match.

Key Takeaways


  • Oat milk offers a creamy texture and sweet flavor , while soy milk provides a neutral taste and higher protein content.

  • Soy milk contains more protein ( 6 to 8g per serving ) compared to oat milk ( 2 to 4g per serving ), making it a better choice for protein-conscious consumers.

  • Oat milk has a higher fiber content , while soy milk is lower in carbohydrates , making each suitable for different dietary needs.

  • Both milk alternatives have a lower environmental impact than dairy milk , with oat milk having a slightly lower carbon footprint.

  • Oat milk excels in coffee drinks and sweet baked goods , while soy milk performs well in savory dishes and as a versatile cooking ingredient .

  • Market trends show rapid growth for oat milk , while soy milk maintains a steady presence due to its established nutritional benefits.


Oat Milk vs Soy Milk: What are they?

Oat milk and soy milk are two popular plant based alternatives to dairy milk, each with its own unique characteristics and production methods.

Oat milk is a creamy beverage made from oats and water. It's created by blending oats with water , then straining the mixture to remove solids. The result? A smooth, slightly sweet liquid that's become a darling of coffee shops and health-conscious consumers alike. Think of it as turning your morning bowl of oatmeal into a drinkable treat.

Soy milk, on the other hand, is the OG of plant milks. It's crafted from soybeans and water through a process that's been perfected over centuries. Soybeans are soaked, ground, and boiled, then filtered to produce a protein-rich liquid. It's like coaxing the essence of tofu into a pourable form.

Both oat and soy milk serve as versatile substitutes for dairy milk. They're go-to options for those with lactose intolerance, dairy allergies, or anyone following a vegan or plant based diet. You'll find them swimming in cereal bowls, swirling in coffee cups, and sneaking into baked goods across the country.

While oat milk boasts a mild, slightly sweet flavor that's won over many taste buds, soy milk offers a more neutral taste that some describe as "beany." Oat milk's creamy texture makes it a barista's dream for lattes, while soy milk's protein content gives it an edge in the nutrition department.

As we check deeper into the oat milk vs soy milk showdown, we'll explore how these plant based champions stack up in terms of nutrition, environmental impact, and more. Whether you're Team Oat or Team Soy, there's plenty to learn about these dairy-free dynamos.

Nutritional Comparison

Let's check into the nutritional showdown between oat milk vs soy milk. We'll break down the key components to help you understand which plant based milk might be the better fit for your dietary needs.

Calories and Macronutrients

Oat milk and soy milk differ in their calorie and macronutrient content. A 240ml serving of oat milk typically contains 84-158 calories , 1.6-3.1g of fat , and 15.6-30.4g of carbohydrates . The fat content in oat milk is primarily from healthy unsaturated fats.

Soy milk, on the other hand, generally has a lower calorie count, ranging from 80-100 calories per 240ml serving. It also tends to have a lower carbohydrate content, usually around 4-8g per serving . The fat content in soy milk is comparable to oat milk, typically ranging from 3-4g per serving .

It's worth noting that these values can vary depending on the brand and whether the milk is fortified or flavored.

Vitamins and Minerals

Oat milk vs soy milk, both are often fortified with essential vitamins and minerals to enhance their nutritional profiles. Oat milk is typically fortified with calcium, vitamin D2, vitamin B2, and vitamin B12. Some brands may also add other nutrients like iron or vitamin A.

Soy milk is usually fortified with similar nutrients, including calcium and vitamins D, B12, and riboflavin. It naturally contains more minerals than oat milk, including potassium, magnesium, and zinc.

While both milk alternatives can contribute to your daily nutrient intake, it's important to check the label of your chosen brand to know exactly what you're getting.

oat milk vs soy milk volleyball

Protein Content

When it comes to protein , soy milk takes the crown in the oat milk vs soy milk battle. Soy milk is a complete protein source, containing all nine essential amino acids. It typically provides 6-8g of protein per 240ml serving, which is comparable to cow's milk .

Oat milk, while nutritious in other aspects, falls short in the protein department. It generally contains only 2-4g of protein per 240ml serving. This lower protein content is one of the main nutritional differences between oat milk and soy milk.

If you're looking to boost your protein intake, soy milk might be the better choice. But don't count oat milk out just yet it's got other tricks up its sleeve!

Fiber Content

Here's where oat milk shines like a star in a milky galaxy. Oat milk typically contains 1.9-2.4g of dietary fiber per 240ml serving . This fiber content is one of oat milk's unique selling points, as most other milk alternatives, including soy milk, contain little to no fiber.

Soy milk, while nutritious in many ways, generally doesn't contain significant amounts of fiber . The fiber in oat milk comes from beta glucans , a type of soluble fiber that's known for its heart health benefits .

Taste and Texture Differences

When it comes to plant-based milk alternatives, taste and texture play crucial roles in consumer preferences. Let's check into the distinct flavor profiles and mouthfeel of oat milk and soy milk to help you choose the perfect pour for your palate.

Flavor Profiles

Oat milk boasts a naturally sweet and mildly nutty taste that's reminiscent of a bowl of oatmeal. Its subtle oat flavor shines through without overpowering, making it a crowd-pleaser in coffee shops and home kitchens alike. The sweetness comes from the natural breakdown of carbohydrates during processing, so even unsweetened varieties have a pleasant taste .

Soy milk, on the other hand, offers a more neutral flavor with a slight beany undertone. Some describe it as earthy or grassy, but modern processing techniques have significantly reduced these notes. Unsweetened soy milk can have a somewhat chalky taste , which is why many prefer the flavored or sweetened versions.

Both milks are versatile in culinary applications . Oat milk's sweetness makes it a star in lattes and baked goods, while soy milk's neutral profile allows it to blend seamlessly into savory dishes without altering the flavor profile.

Consistency and Mouthfeel

Oat milk takes the crown for creaminess . Its consistency is often described as velvety and smooth, closely mimicking whole dairy milk. This luxurious texture comes from the high starch content in oats, which creates a natural thickness without additives. Baristas love oat milk for its ability to froth and create latte art, rivaling dairy milk in coffee beverages.

Soy milk, while not as creamy as oat milk, still offers a satisfying mouthfeel . It's typically thicker than skim milk but lighter than whole milk. The protein content in soy milk contributes to a slightly fuller body compared to other plant-based alternatives. When heated, soy milk can develop a thin skin on top, similar to dairy milk.

Health Benefits and Considerations

When it comes to oat milk vs soy milk, both offer unique health benefits and considerations. Let's check into some key aspects that may influence your choice between these popular plant-based milk alternatives.

oat milk vs soy milk tennis

Lactose Intolerance

For those who can't tolerate dairy, oat milk and soy milk are excellent alternatives. Over 90% of some East Asian communities are lactose intolerant, making plant-based milk a lifesaver. Oat milk is naturally lactose-free, offering a creamy texture without the digestive discomfort. Soy milk, also lactose-free, provides a protein-rich option for those avoiding dairy. Both can help sidestep symptoms like bloating, gas, and abdominal pain that often accompany lactose consumption. It's like having your milk and drinking it too, without the tummy troubles! Remember, while these alternatives are great for lactose intolerance, they're not suitable for those with oat or soy allergies respectively.

Blood Sugar Management

When it comes to blood sugar management, oat milk and soy milk play different roles. Oat milk, with its higher carbohydrate content (15.6-30.4g per 240ml), may cause a quicker rise in blood sugar levels. It's like a rollercoaster for your glucose – fun for some, but not ideal for others. Soy milk, on the other hand, has a lower carb content (4-8g per 240ml) and a higher protein content, which can help stabilize blood sugar levels. This makes soy milk a potentially better choice for those managing diabetes or watching their carb intake . However, it's important to note that individual responses can vary, and unsweetened versions of both milk types are always a better option for blood sugar control.

Potential Health Concerns

While both oat milk and soy milk offer health benefits, they also come with potential concerns. Oat milk, unless certified gluten - free , may contain traces of gluten, making it unsuitable for those with celiac disease or gluten sensitivity. It's like playing Russian roulette with your toast if you're gluten-sensitive! Soy milk, on the other hand, contains phytoestrogens, which have been a topic of debate. Some studies suggest these plant compounds may have hormone-like effects, but research is ongoing and results are mixed. Additionally, if you're watching your weight, be aware that both milk types can vary in calorie content, with some varieties containing added sugars. As with any dietary change, it's best to consult with a healthcare professional to determine which option aligns best with your individual health needs.

Environmental Impact

When it comes to the environmental impact of plant-based milks, oat milk and soy milk both have significantly lower footprints than dairy milk . However, there are some differences between these two popular alternatives that are worth exploring.

Carbon Footprint

Oat milk takes the crown in the carbon footprint contest . It generates much lower direct greenhouse gas emissions compared to dairy milk, with studies showing a reduction of about 80% . Soy milk also performs well, but not quite as impressive as its oaty cousin. The production of oat milk requires less energy and produces fewer emissions during processing and transportation. It's like oat milk is driving a fuel-efficient compact car while soy milk is in a mid-size sedan – both better than dairy's gas-guzzling SUV, but oat milk's got the edge.

oat milk and soy milk surf

Water Usage

When it comes to water usage, both oat milk and soy milk are more efficient than dairy, but soy milk has a slight advantage. Oats require more water to grow than soybeans, though the difference isn't as dramatic as you might think. Soy milk production uses about 28% of the water needed for dairy milk, while oat milk uses roughly 60% . It's like comparing a water-saving showerhead to a low-flow faucet – both are better than leaving the tap running, but one's just a tad more efficient.

Land Use

In the land use department, soy milk takes the lead . Soybeans are incredibly efficient crops, requiring less land to produce the same amount of milk compared to oats. However, it's important to note that both oat and soy crops use significantly less land than dairy production. Dairy farming requires vast areas for grazing and growing feed crops. In comparison, growing oats and soybeans for milk production is like playing Tetris with farmland – they fit more production into less space. While soy might pack in a few more pieces, both are winning the game against dairy's space-hogging approach.

Culinary Applications

Oat milk vs soy milk have revolutionized plant-based cooking, offering unique flavors and textures to various culinary creations. Let's explore how these milk alternatives shine in different kitchen applications.

Baking and Cooking

Oat milk's creamy consistency and subtle sweetness make it a star in baked goods. It's excellent for creating moist cakes , fluffy pancakes , and rich custards . The natural sweetness of oat milk can even reduce the need for added sugar in some recipes. On the flip side, soy milk's protein content gives it an edge in savory dishes . It's a fantastic dairy substitute in creamy soups , sauces , and gravies , providing a smooth texture without altering the flavor profile significantly.

In vegan baking, soy milk's protein structure helps bind ingredients , resulting in better - textured baked goods . It's particularly useful in recipes that require a firmer set, like vegan cheesecakes or quiches . However, oat milk shines in recipes where a touch of sweetness is welcome, such as muffins or quick breads . Both milk alternatives can be used interchangeably in most recipes, but each brings its unique characteristics to the table.

Coffee and Tea Pairings

When it comes to coffee and tea, oat milk vs soy milk is a hot topic among baristas and café-goers alike. Oat milk has taken the coffee world by storm, thanks to its ability to froth beautifully and create silky microfoam for latte art. Its natural sweetness complements the bitterness of coffee, making it a favorite for lattes and cappuccinos. Some coffee enthusiasts even joke that oat milk lattes are the "gateway drug" to plant-based milk alternatives!

Soy milk, while not as trendy in coffee circles, still holds its own. It steams well and offers a neutral base that lets the coffee's flavors shine through. In tea, soy milk's lighter texture works wonderfully in traditional milk teas like chai or English breakfast . Oat milk, on the other hand, can sometimes overpower delicate tea flavors but pairs nicely with robust blends like Earl Grey or Masala Chai .

Production Processes

The journey from plant to milk alternative is a fascinating process for both oat milk and soy milk. Let's check into the nitty-gritty of how these popular dairy alternatives are crafted, from field to carton.

oat milk vs soy milk jetski

Manufacturing Methods

Oat milk production starts with a splash of ingenuity. Whole oats are milled and mixed with water, creating a soupy oat slurry. This mixture then undergoes enzymatic treatment , breaking down the oat starches into smaller, more digestible molecules. It's like giving the oats a spa day, but instead of relaxation, they're getting a molecular makeover. The resulting liquid is then strained to remove any remaining solids, leaving behind a smooth, creamy base.

Soy milk, on the other hand, takes a different route. Soybeans are soaked, ground, and then boiled. This process is akin to brewing a giant pot of soybean tea, but with a lot more precision. The boiling step is crucial as it deactivates certain enzymes and improves the milk's flavor . After boiling, the mixture is filtered to separate the liquid from the soybean pulp, resulting in the familiar soy milk we know.

Both milks are then fortified with vitamins and minerals, homogenized for consistency, and pasteurized for safety before being packaged for distribution.


Soy Milk or Oat Milk can both be made at home which offers a significant cost savings over store bought. It also eliminates any additives or preservatives typically found in store bought versions.

Ingredient Sources

When it comes to oat milk vs soy milk, the ingredient list is surprisingly short, but the sources are worlds apart. Oats, the star of oat milk, are primarily grown in cooler climates. North America and Europe are major players in oat production, with Canada often taking the crown as the world's largest exporter. These hardy grains are relatively low-maintenance crops, requiring less water than many alternatives.

Soybeans, the foundation of soy milk, have a different story. They thrive in warmer climates and are a significant crop in countries like the United States, Brazil, and Argentina. Soybeans are nitrogen-fixing plants, which means they can improve soil health naturally. However, the soybean industry has faced scrutiny due to concerns about deforestation in some regions.

Both oats and soybeans are often subject to genetic modification, so many manufacturers opt for non - GMO or organic sources to address consumer concerns. The choice between oat milk and soy milk isn't just about taste or nutrition – it's also a global agricultural journey from field to glass.

Consumer Acceptance and Market Trends

Oat milk and soy milk have taken the plant-based milk market by storm, each carving out its own niche in the hearts of consumers. Oat milk has become the darling of coffee shops , with its creamy texture and barista - friendly frothing ability. It's like the cool new kid on the block, turning heads and winning taste buds left and right. Soy milk, on the other hand, is the reliable old friend that's been around for years, offering a protein punch that health - conscious consumers can't resist.

Market trends show oat milk sales skyrocketing. It's like oat milk strapped on a jetpack and zoomed past its plant-based competitors. Soy milk, while not growing as rapidly, still holds a significant market share, especially among those seeking a nutritious, versatile option.

Consumer acceptance of these milk alternatives varies by region and demographic. In urban areas and among younger consumers, oat milk is often seen as the trendier choice. It's the milk equivalent of avocado toast – hip, Instagram - worthy , and delicious . Soy milk tends to appeal more to health-conscious consumers and those with longer-standing dairy alternatives habits.

Both options benefit from the increasing awareness of environmental and health issues associated with dairy consumption. As more people adopt flexitarian or plant - based diets , the demand for these milk alternatives continues to grow. It's like the plant-based milk aisle is hosting its own popularity contest, and both oat and soy milk are vying for the crown.

oat milk vs soy milk beach

Conclusion

Both oat milk or soy milk offer unique benefits as plant-based alternatives to dairy. Oat milk shines with its creamy texture and subtle sweetness while soy milk boasts impressive nutritional value. We've explored their taste profiles environmental impacts and culinary applications to help you make an informed choice.

Whether you're lactose intolerant vegan or simply looking to diversify your diet these milk alternatives have something to offer. Remember that personal preference health needs and environmental considerations all play a role in choosing between oat and soy milk. Ultimately the best choice is the one that aligns with your individual needs and values.

Frequently Asked Questions

Which milk alternative has more protein, oat milk or soy milk?

Soy milk has significantly more protein than oat milk. A typical serving of soy milk contains 6-8g of complete protein, while oat milk only provides 2-4g per serving. This makes soy milk a better choice for those looking to increase their protein intake, especially vegans and vegetarians.

Is oat milk or soy milk better for people with diabetes?

Soy milk is generally better for people with diabetes due to its lower carbohydrate content and higher protein levels. A serving of soy milk contains only 4-8g of carbs, compared to 15.6-30.4g in oat milk. The lower carb content in soy milk can help manage blood sugar levels more effectively.

Which plant-based milk is more environmentally friendly?

Both oat milk and soy milk are more environmentally friendly than dairy milk, but oat milk has a slight edge. Oat milk generates about 80% less greenhouse gas emissions than dairy milk. However, soy milk uses less water and land compared to oat milk, making it more efficient in those aspects.

Is oat milk or soy milk better for coffee and lattes?

Oat milk is generally preferred for coffee and lattes due to its creamy texture and natural sweetness. It froths well, making it ideal for latte art. Soy milk, while also suitable, has a lighter mouthfeel and can sometimes develop a thin skin when heated, making oat milk the favored choice in coffee shops.

Which milk alternative is best for baking?

Oat milk is often considered superior for baking due to its creamy consistency and subtle sweetness. It enhances moisture in cakes and pancakes, making baked goods more tender. However, soy milk's higher protein content can be beneficial in certain recipes, particularly in savory baked dishes.

Are oat milk and soy milk suitable for people with lactose intolerance?

Yes, both oat milk and soy milk are excellent alternatives for people with lactose intolerance. They are naturally lactose-free and can help avoid digestive discomfort associated with dairy consumption. Both options provide similar versatility to dairy milk in various culinary applications.

How do the calorie contents of oat milk and soy milk compare?

Oat milk typically has a higher calorie content than soy milk. A 240ml serving of oat milk contains 84-158 calories, while the same amount of soy milk has about 80-100 calories. The difference is mainly due to oat milk's higher carbohydrate content.

Which milk alternative has a better nutritional profile?

Both oat milk and soy milk offer unique nutritional benefits. Soy milk has a higher protein content and fewer carbs, making it more balanced. Oat milk excels in fiber content, which is beneficial for heart health. Both are often fortified with essential vitamins and minerals, so the "better" option depends on individual nutritional needs.

Edward Haugh - Founder of Milk Depot
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Author: Edward Haugh - Founder of Milk Depot

Edward is a leading authority on plant based milks. With a passion for health, sustainability, and innovation, he has transformed the way consumers approach milk. His flagship product, the Milk Maker, enables users to create fresh, homemade plant-based milks in under a minute, free from additives and preservatives, all while saving customers up to 90% the cost of store bought milks.

As a trusted voice in the plant-based community, Edward advocates for the benefits of almond, oat, cashew, hemp, soy and all plant based milks while raising awareness on the dangers of the conventional milk industry, from it's additives, single use packaging waste, to environmental concerns and everything in-between. 

Through his articles on the free milk makers academy, and recipe blog, he provides essential insights and resources, empowering individuals to adopt healthier, eco-friendly choices. Edward Haugh is your go-to expert for all things plant based milk.
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