The Basics of Protein: An Essential Guide for Plant-Based Eaters

Plant-Based Proteins (01)

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Introduction

When you hear the word “protein,” what comes to mind? Maybe it’s a meat of some sort, a scoop of protein powder, or a hearty bean stew. Whatever the image, protein is often celebrated as a key player in our diets, and for good reason. It’s essential for building and repairing tissues, making enzymes and hormones, and supporting overall health. But what exactly is protein?

In this guide, we’re going to explore the basics of protein, clarify common misconceptions, and discover easy ways to include plant-based sources in your diet.

What is Protein?

Proteins are large, complex molecules that play many critical roles in the body. They are made up of smaller units called amino acids. Imagine amino acids as the individual links in a chain, each with unique properties. There are 20 different amino acids, and they combine in various ways to create thousands of proteins, each with its own specific function.

Of these 20 amino acids, nine are considered essential because our bodies cannot produce them; we must obtain them from our diet. The good news is that you don’t need to stress about combining specific foods to get these essential amino acids. As long as you consume a variety of grains, legumes, and vegetables, you’ll get all the essential amino acids your body needs.

The Roles of Protein in Our Bodies

Now that we have discussed the basics of protein, let’s explore some of their roles. Proteins have a multitude of roles in our bodies, including:

  1. Structural support: Proteins provide strength and flexibility to tissues, tendons, ligaments, muscles, organs, bones, nails, hair, and skin.
  2. Enzyme and hormone production: Proteins are needed to make most enzymes that speed up reactions in your body and many hormones that regulate specific activities.
  3. Fluid balance: Proteins help maintain the balance of fluids in your blood and tissues.
  4. Acid-base balance: Proteins act as buffers to help keep the pH of your body fluids balanced.
  5. Transport: Proteins transport substances like oxygen, waste products, and nutrients throughout your body.
  6. Immune function: Proteins create antibodies that help your immune system fight off pathogens.
  7. Energy: When necessary, proteins can be used as a source of energy.
  8. Satiety: Proteins can help you feel full longer, aiding in appetite control and weight management.

"Complete Proteins" and Amino Acid Pools

All plant-based foods contain all nine essential amino acids, contrary to the outdated belief that some plant foods are incomplete proteins. The term “complete protein” originated in the early 20th century when researchers believed that only animal products contained all essential amino acids in the necessary proportions for human health. However, modern research has shown that all plant foods provide all the essential amino acids, albeit in varying amounts.[1]

Whether you’re eating quinoa, soy, or any other plant food, you’re getting all the essential amino acids your body needs. The key is to focus on consuming a variety of plant-based foods and meeting your energy needs, which not only ensures sufficient protein intake but also supports the maintenance of balanced amino acid pools. These pools enable your body to draw on a steady supply of amino acids throughout the day, promoting overall nutritional balance.

How Much Protein Do We Really Need?

One of the biggest myths about protein is that we need large amounts to be healthy. The average American consumes more protein than necessary. According to the U.S. government, the recommended daily allowance (RDA) for protein is about 46 grams for women and 56 grams for men.[2] However, many of us consume much more than this.

To put these numbers into perspective, here’s an example of how to get 56 grams of protein in a day with plant-based sources:

  • Breakfast: A bowl of oatmeal with almond butter and a banana (about 10 grams of protein)
  • Lunch: A quinoa salad with black beans, veggies, and a tahini dressing (about 20 grams of protein)
  • Snack: A handful of almonds (about 6 grams of protein)
  • Dinner: A tofu stir-fry with mixed vegetables and brown rice (about 20 grams of protein)
  • Total Protein: Around 56g of protein.


As you can see, it’s entirely possible to meet your protein needs with plant-based foods, and it’s often easier than you might think.

Yes, Plants Have Protein!

A common misconception is that plant-based diets lack sufficient protein. This couldn’t be further from the truth. As illustrated above, plants are excellent sources of protein and come with additional benefits that animal proteins might not offer.

If you’re looking to diversify your protein sources and include more plants in your diet, here are some simple and delicious ways to add more plant proteins:

  • Lentils and Beans: These are versatile and can be added to soups, stews, salads, and even tacos.
  • Tofu and Tempeh: These soy products are excellent sources of protein and can be used in a variety of dishes, from stir-fries to sandwiches. Despite what some might believe, tofu can be delicious when prepared well!
  • Quinoa: This grain is not only high in protein but also contains all nine essential amino acids.
  • Nuts and Seeds: These make great snacks and can be added to salads, oatmeal, and smoothies.
  • Plant-Based Milks: Swap out dairy milk for soy milk, which has the highest protein content among plant-based milk alternatives.

Further Reading: Enhance Your Plant-Based Cooking

If you’re new to cooking things like tofu and quinoa, check out my blog post “7 Kitchen Tools to Enhance Your Plant-Based Cooking” for tools to help you do so.

The Full Package: What's Accompanying Your Protein?

Animal proteins often come with saturated fats and cholesterol, which can contribute to health issues if consumed in excess. On the other hand, plant proteins are typically accompanied by fiber, antioxidants, vitamins, and minerals. These additional nutrients support overall health and digestion.

Recap and Conclusion

  • The Basics of Protein: Proteins are made up of amino acids, some of which are essential and must be obtained from the diet.
  • Complete Proteins: Both plant and animal sources can provide all the essential amino acids when you eat a varied diet.
  • Roles in the Body: Proteins are crucial for structural support, enzyme and hormone production, fluid balance, and more.
  • Daily Requirements: The average daily protein needs are 46 grams for women and 56 grams for men, which can be met with plant-based foods.
  • Benefits of Plant Proteins: Plant proteins come with added nutrients like fiber, vitamins, and minerals, supporting overall health.

Remember, it’s not about being perfect or going entirely plant-based overnight. It’s about making conscious choices to include a variety of protein sources in your meals and reaping the benefits over time. Whether you include animal proteins in your diet or not, the goal here is to explore the benefits of incorporating more plant proteins into your meals and to enjoy the variety and nutritional benefits they offer.

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