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How to Combine with Oatmeal to Make a Complete Protein

4 min read

While oats are a good source of protein, they lack sufficient amounts of the essential amino acid lysine. This makes oatmeal an 'incomplete' protein, but by combining it with specific complementary foods, you can easily create a complete protein source in a single, satisfying meal.

Quick Summary

Discover the ideal complementary pairings for your oatmeal to create a complete protein. By combining oats with specific legumes, seeds, nuts, or dairy, you can build a more nutritionally balanced and satisfying meal. Options range from simple mix-ins to more elaborate, flavorful breakfast bowls.

Key Points

  • Combine with Legumes: Pair oats (a grain) with legumes like peanuts, beans, or lentils to supply the essential amino acid lysine that oats lack.

  • Use Complete Protein Seeds: Add seeds like chia, hemp, or quinoa, which are already complete proteins, directly to your oatmeal for a simple solution.

  • Stir in Dairy: For non-vegans, mix in Greek yogurt, cottage cheese, or a high-protein milk to make your oatmeal a complete protein.

  • Add Protein Powder: A scoop of whey, soy, or pea protein powder is an easy way to ensure a complete amino acid profile with minimal effort.

  • No Same-Meal Rule: The theory that complementary proteins must be eaten at the same meal has been debunked; you can combine them throughout the day.

  • Opt for Nut Butter: A spoonful of peanut butter or other legume-based butter is one of the most popular and straightforward methods to complete your oatmeal's protein.

In This Article

Understanding Incomplete and Complete Proteins

To understand what to combine with oatmeal, it's helpful to know the difference between incomplete and complete proteins. Complete proteins contain all nine essential amino acids that the human body cannot produce on its own. Animal products like meat, eggs, and dairy are classic examples of complete proteins. In contrast, most plant-based foods, including oats, are incomplete proteins because they are lower in one or more of these essential amino acids, most notably lysine in the case of grains.

Protein complementation is the process of combining different incomplete protein sources to achieve a complete amino acid profile. However, the good news is that you don't need to combine complementary proteins in the same meal, just over the course of the day. For convenience, and for those with specific fitness goals, combining them in one meal can be a simple strategy to increase satiety and nutritional value.

The Golden Rule: Combine Oats with Legumes or Specific Seeds

Since oats are a grain, the most effective plant-based method to make a complete protein is to combine them with a legume or a source naturally rich in lysine.

  • Legumes: This category includes beans, lentils, and peanuts. A classic and delicious combination is oatmeal with peanut butter, as the peanuts (a legume) provide the amino acids that the oats lack.
  • Seeds: Certain seeds are excellent complements. Chia seeds, hemp seeds, and quinoa (which is actually a seed) are all complete proteins on their own and can easily be added to your oatmeal.
  • Dairy and Eggs: For non-vegans, combining oatmeal with dairy products like milk or Greek yogurt, or even scrambling an egg into it, provides a simple and effective complete protein.

High-Protein Oatmeal Recipes

High-Protein Peanut Butter Oatmeal

This is a simple, go-to recipe that ensures a complete protein profile.

  • 1/2 cup rolled oats
  • 1 cup milk (dairy or soy for added protein)
  • 2 tablespoons natural peanut butter
  • 1 tablespoon chia or hemp seeds
  • 1/2 sliced banana

Instructions: Cook the oats with milk as you normally would. Once cooked, stir in the peanut butter and seeds until creamy. Top with sliced banana and enjoy.

Berry Cheesecake Overnight Oats

This overnight oat recipe uses cottage cheese for a creamy, high-protein dessert-for-breakfast feel.

  • 1/2 cup rolled oats
  • 1/2 cup blended cottage cheese (blended until smooth)
  • 1/2 cup high-protein milk of choice (e.g., soy milk)
  • 1 tablespoon maple syrup
  • 1/2 cup mixed berries

Instructions: Mix oats, blended cottage cheese, milk, and maple syrup in a jar. Layer berries on top. Close and refrigerate overnight. Stir well before serving.

Savory Oatmeal with Seeds and Nut Butter

For those who prefer a savory breakfast, this recipe is a game-changer.

  • 1/2 cup steel-cut or rolled oats
  • 1 cup water or vegetable broth
  • 1-2 tablespoons pumpkin or sunflower seeds
  • 1 tablespoon tahini (sesame seed paste)
  • Drizzle of soy sauce or tamari
  • Optional toppings: sautéed spinach, mushrooms, and scallions

Instructions: Cook oats in water or broth until creamy. Stir in seeds, tahini, and soy sauce. Top with sautéed vegetables and serve hot.

Comparison of Complementary Oatmeal Pairings

Complementary Food Protein Type Amino Acid Profile Other Benefits Recipe Idea
Peanut Butter Legume Completes lysine deficiency in oats Healthy fats, fiber, creamy texture Peanut Butter Oatmeal
Greek Yogurt / Cottage Cheese Dairy Complete protein source Probiotics (yogurt), calcium, very high protein Berry Cheesecake Oats
Soy Milk / Edamame / Tofu Legume / Soy Complete protein source Plant-based, lower saturated fat Tofu Scramble Oatmeal
Chia Seeds / Hemp Seeds Seed Complete protein source High in fiber, Omega-3s, and minerals High-Protein Overnight Oats
Protein Powder Varied (whey, soy, pea) Complete protein source Highly concentrated protein, customizable flavor Protein Powder Oatmeal
Nuts (Almonds, Walnuts) Incomplete (combine with legumes) Provides some amino acids, but requires a legume for full complementation Healthy fats, fiber, minerals Oatmeal with Nuts and Beans

The Health Benefits of Complete Proteins

Consuming a complete protein in a single meal, or throughout the day, offers numerous health advantages. Getting all essential amino acids in adequate amounts supports muscle repair and growth, especially important for those with active lifestyles. Complete protein intake also helps regulate hormones and enzymes, aids in immune function, and promotes stable energy levels. For those on a vegan or vegetarian diet, being mindful of protein complementation is a key strategy for meeting nutritional requirements and promoting overall health.

Conclusion

Making oatmeal a complete protein is a straightforward process that simply requires pairing it with the right complementary foods. Whether you prefer a creamy and sweet breakfast or a hearty and savory one, there are numerous ways to boost the amino acid profile of your oats. By adding ingredients like nuts, seeds, nut butters, or dairy, you can create a meal that is not only delicious and filling but also nutritionally balanced. This makes oatmeal an incredibly versatile and healthy foundation for a protein-packed start to your day.


  • For more on the benefits and sources of protein, you can consult a reputable health resource like the American Heart Association.

Frequently Asked Questions

Oatmeal lacks sufficient amounts of the essential amino acid lysine, which is found in abundance in legumes like beans, peas, and lentils.

No, the body stores essential amino acids throughout the day. Combining complementary proteins over the course of a day is sufficient to meet your needs, but pairing them in one meal can be convenient.

Yes, several plant-based foods are complete proteins, including soy (tofu, tempeh, edamame), quinoa, chia seeds, and hemp seeds. Any of these can be added to oatmeal.

For a significant protein boost, you can add one scoop (typically around 1/4 cup) of protein powder to your cooked oatmeal. Stir it in after cooking to prevent clumping.

For a savory complete protein oatmeal, cook your oats with vegetable broth instead of water and stir in ingredients like tahini (sesame seed paste) or top with sautéed legumes and seeds.

While nuts are healthy, they are not legumes. The classic complete protein pairing is legumes with grains, so for a full complement, use a legume-based butter like peanut butter or add legumes separately.

Overnight oats are an excellent method. You can easily mix in ingredients like chia seeds, hemp seeds, or protein powder along with milk and other toppings the night before for a grab-and-go complete protein meal.

Medical Disclaimer

This content is for informational purposes only and should not replace professional medical advice.