Korean Black Soybean Milk: Seoritae Duyu, Nutrition and Hair Health

By K Well

Korean Black Soybean Milk: Seoritae Duyu, Nutrition and Hair Health

Images in this article are AI-generated for illustrative purposes.

Korean black soybean milk, or seoritae duyu (서리태 두유), is a creamy drink made from black soybeans with distinctive green interiors. Its mild, nutty flavour makes it an easy breakfast drink or snack, while its plant protein, unsaturated fats and naturally occurring isoflavones add useful nutrients to a balanced diet.

Seoritae is often associated with healthy hair in Korean food culture because black beans and black sesame are traditionally viewed as nourishing ingredients. Enjoying seoritae duyu as part of a balanced diet is a simple way to add plant protein and other nutrients that support healthy hair and overall wellbeing.

This guide explains what makes seoritae different from ordinary UK black beans, how its nutrients fit into a hair-supportive diet and how to prepare a smooth homemade version safely.

Key Takeaways

  • Nutrient-Rich Soybean: Seoritae provides complete plant protein, fibre, unsaturated fats and soy isoflavones, while its dark seed coat contains anthocyanins.
  • Supportive Hair Nutrition: Protein and micronutrients contribute to normal tissue maintenance, making black soybean milk a useful part of a varied diet that supports healthy hair and scalp.
  • Correct UK Ingredient: Look for seoritae, black soybeans or green-kernel black soybeans at Korean grocers; supermarket black turtle beans are a different legume.

What Is Seoritae?

Seoritae is a Korean variety of black soybean. The dried bean has a dark outer skin and a green interior, which distinguishes it from the cream-coloured interior of many black turtle beans.

The Korean name is traditionally connected with beans harvested around the first frost. Seoritae is used in multigrain rice, rice cakes, side dishes and drinks such as duyu. When blended, the green centre and dark skin can give the drink a muted grey-green colour rather than the bright white appearance of commercial soya milk.

Like yellow soybeans, seoritae belongs to Glycine max. It therefore has the nutritional characteristics of a soybean, including protein and naturally occurring fat, rather than the mainly starchy profile of black turtle beans.

Seoritae Is Not the Same as a UK Black Bean

Packets and tins labelled simply black beans in Tesco, Sainsbury’s and other UK supermarkets usually contain black turtle beans. These are useful for chilli, salads and soups, but they are not black soybeans and will not produce the same flavour or nutritional profile as seoritae duyu.

When shopping, look for one of these names:

  • Seoritae (서리태)
  • Korean black soybeans
  • Black soybeans
  • Green-kernel black soybeans

The most reliable places to find them in the UK are Korean supermarkets such as H Mart, Oseyo and Korea Foods, independent East Asian grocers and specialist online shops. Check that the beans have the characteristic green centre if the packaging allows you to see them.

K-Well’s Shopping Tip: Do not replace seoritae with canned black turtle beans when you want an authentic drink. If seoritae is unavailable, use an unsweetened soya drink for the quick version later in this guide.

Why Seoritae Duyu Is a Nourishing Choice

Complete Plant Protein

Soy is considered a complete protein because it contains all nine essential amino acids. Protein provides the amino acids required to build and maintain body tissues, including keratin, the main structural protein in hair.

A glass of homemade seoritae duyu can help add protein to breakfast or an afternoon snack. The exact amount depends on how many beans and how much water you use, so homemade drinks should not be assigned a fixed protein value without calculating the complete recipe.

Fibre and Unsaturated Fat

Blending the whole cooked bean retains more of its fibre than filtering the drink until completely smooth. Soybeans also contain predominantly unsaturated fats, which add richness and help make the drink satisfying.

If you prefer a very smooth drink, use a powerful blender and add water gradually. A small amount of sediment is natural and can be stirred or shaken back into the drink before serving.

Isoflavones and Anthocyanins

Soybeans naturally contain isoflavones, a group of plant compounds studied in relation to several aspects of health. The black seed coat of seoritae also contains anthocyanins, pigments responsible for its dark colour.

These compounds make black soybeans nutritionally interesting, but research on isolated compounds or cells should not be interpreted as proof that drinking seoritae duyu directly stimulates hair follicles. Its clearest benefit is that it combines these plant compounds with protein, fibre and minerals in a versatile whole food.

How Seoritae Duyu Fits into a Hair-Supportive Diet

Healthy hair is influenced by genetics, hormones, age, health conditions and overall nutrition. Adequate protein matters because hair is largely made from keratin. Iron and zinc also have important roles in normal body function, and low iron status can be associated with hair loss.

Seoritae can contribute plant protein, iron and zinc, but no single food supplies everything needed for hair health. Build variety around it with vegetables, fruit, whole grains, nuts, seeds and other protein sources.

Pairing plant sources of iron with vitamin C can support iron absorption. For example, enjoy your seoritae duyu alongside berries, kiwi or an orange to create a more nutritionally balanced breakfast or snack.

Easy Korean Black Soybean Milk Recipe

Makes: Approximately 4 servings
Preparation: 10 minutes, plus soaking and cooking
Dietary notes: Vegan and gluten-free when all ingredients are suitable

Ingredients

  • 1 cup dried seoritae or black soybeans
  • 4 cups cold water, plus extra for soaking and cooking
  • 1 tablespoon toasted black sesame seeds (optional)
  • ¼ teaspoon fine salt (optional)
  • 1–2 teaspoons honey or maple syrup (optional)

Use maple syrup rather than honey for a fully vegan drink.

Method

1. Soak the Beans

Sort through the beans, discard any damaged pieces and rinse thoroughly. Place them in a large bowl, cover with plenty of cold water and soak for 8–12 hours. Refrigerate the bowl when soaking overnight, especially in warm weather.

Drain the soaking water and rinse the beans again.

2. Cook Until Completely Tender

Place the soaked beans in a saucepan and cover generously with fresh water. Bring to the boil, then reduce the heat and simmer until the beans are completely cooked and tender throughout.

Cooking time varies with the bean variety, age and soaking time, so follow the packet directions and test the texture rather than relying on a fixed ten-minute simmer. A cooked bean should be easy to crush and should not have a hard or raw-tasting centre.

Drain the beans, reserving some cooking liquid if you would like to use it to adjust the drink’s consistency. Allow them to cool slightly before blending.

3. Blend the Whole Beans

Add the cooked beans and four cups of cold water to a high-powered blender. Add the toasted black sesame, salt and sweetener, if using.

Blend until creamy and smooth, working in batches if necessary. Add a little more water for a lighter drink or use less for a spoonable, smoothie-like consistency.

K-Well’s Texture Tip: Keep the blended beans in the drink for a naturally creamy texture and more fibre. If your blender is small, divide the ingredients between two batches to avoid overfilling it.

4. Chill and Serve

Transfer the drink to a clean covered bottle or jug and refrigerate promptly. Stir or shake before serving because natural separation is expected.

Enjoy it chilled, over ice or gently warmed. Start with a small glass and adjust the thickness to your preference.

K-Well’s Convenience Tip: If you make seoritae duyu regularly for breakfast, a soya milk maker can simplify the process by cooking and blending the beans in one appliance. Some models can use dried beans directly, while others require pre-soaking, so follow the manufacturer’s instructions and observe the minimum and maximum fill lines.

Quick Version with Unsweetened Soya Milk

When dried seoritae is difficult to find, you can make a convenient black sesame soya drink. It will not be authentic seoritae duyu, but it retains the mild soy-and-sesame flavour combination.

Blend the following until smooth:

  • 250ml unsweetened soya drink
  • 1 tablespoon toasted black sesame seeds or unsweetened black sesame paste
  • A pinch of salt (optional)
  • ½ teaspoon maple syrup (optional)

Choose a soya drink containing a meaningful amount of soya bean and check whether it is fortified with calcium, vitamin D or vitamin B12. Fortification varies between brands.

K-Well’s Serving Ideas

Seoritae duyu is flexible enough for breakfast, snacks and light post-exercise meals.

  • Serve it with berries and wholegrain toast at breakfast.
  • Blend it with half a banana for a naturally sweeter drink.
  • Add toasted black sesame for a deeper, nuttier flavour.
  • Pair it with fruit and a small handful of nuts for an afternoon snack.
  • Use a thicker version as the base of a smoothie bowl.

After exercise, combine the drink with a carbohydrate source such as fruit, oats or toast when you need a more complete recovery snack. Your individual needs depend on the length and intensity of the session.

For another chilled Korean soybean dish, try Kongguksu: Korean Soybean Noodle Soup.

Storage

Store homemade seoritae duyu in a clean, covered container in the refrigerator and use it within three days. Keep it chilled rather than leaving it at room temperature, and discard it if the smell, flavour or appearance changes unexpectedly.

Natural separation does not mean the drink has spoiled. Shake it well before pouring. Freeze small portions if you cannot use the whole batch in time, although the texture may be slightly less smooth after defrosting.

FAQ

Q1. Can Black Soybean Milk Make Hair Grow Faster?

Seoritae duyu provides protein and other nutrients that contribute to a balanced diet, but it is not a hair-growth treatment. Its value lies in supporting good overall nutrition, one of several factors involved in maintaining normal hair.

Q2. Can I Use Ordinary Black Beans Instead of Seoritae?

Black turtle beans are a different legume and do not create the same drink. Use seoritae or another black soybean for the authentic recipe. For a convenient alternative, use unsweetened soya drink with toasted black sesame.

Q3. Do I Need to Remove the Soybean Skins?

No. The dark skins contain the pigments that distinguish black soybeans and can be blended into the drink. A high-powered blender produces the smoothest result.

Q4. Is Seoritae Duyu Suitable for Everyone?

It is unsuitable for anyone with a soy allergy. If you take levothyroxine, follow the timing instructions provided with your medicine because soya foods can affect its absorption. Ask a pharmacist or healthcare professional if you are unsure how to fit soy foods around your medication.

K-Well’s Final Thoughts

Seoritae duyu turns a traditional Korean ingredient into a creamy, practical drink rich in plant protein and naturally occurring soybean nutrients. Its black skin, green centre and nutty flavour also make it distinctly different from an ordinary supermarket black-bean drink.

Enjoy it as one part of a varied diet that provides enough protein, iron, zinc, fruits and vegetables. With properly cooked beans, minimal added sweetness and a texture adjusted to your taste, homemade seoritae duyu can become a simple and satisfying K-wellness routine.

Read Next

References