Amino Acids for Dogs: Everything to Know

Did you know that all living things need amino acids to survive? We break down the science behind these vital molecules, explain why they are so important, and cover how you can help your furry friend get enough of them.

Key Takeaways

Your dog needs amino acids to survive and thrive.
Amino acids are used to make proteins, which are central to all kinds of bodily structures and functions.
Dogs need to get 10 amino acids, called essential amino acids, from their diet.
Some other amino acids, like glutamine, are conditionally essential.
A healthy diet should contain sufficient high-quality protein sources to give your dog enough essential amino acids.
Supplements can also be a good source of amino acids and other potentially supportive compounds.

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Essential Amino Acids

Sean Zyer, founder of Earth Buddy, says:

"Amino acids are the building blocks of life. Dogs need to get some of them from food, making a healthy diet essential. Supplements can also be good sources of amino acids for your pup."

Amino acids are incredibly important. In fact, they're essential for survival. That's true for both humans and dogs.

You might have heard about how amino acids are important for muscle development. That's one of the most well-known purposes of amino acids. But they are involved in many other aspects of life, including tissue repair, immune function, collagen formation, nerve function, gut health, and much, much more.

Fortunately, there are a few great ways to ensure your furry friend gets enough essential amino acids. Before we get to that, we need to explore how these molecules work and why, exactly, they're so important.

What Are Amino Acids?

Amino acids are essentially the building blocks of proteins. They are used in protein synthesis.

You probably know that protein is used to repair and construct muscle tissue. Protein actually has many more uses.

It's involved in energy production and is important for repairing body tissues in general. Proteins can act as enzymes, antibodies, and hormones.

Essential Nutrients

There are hundreds of amino acids. Of those, roughly two dozen are involved in protein synthesis in dogs.

Like humans, dogs need enough of all these amino acids for overall health. Their bodies use them in stages, so if one is missing, the whole process can grind to a halt.

Dogs also can't store amino acids for very long. That means they need to regularly replenish them through their diet.

Dogs can make some of these amino acids naturally. But not all.

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The 10 Essential Amino Acids

Dogs need to get some amino acids from their diet. These amino acids are called essential amino acids.

There are 10 essential amino acids for dogs, each with different potential benefits:

Arginine
Histidine
Isoleucine
Leucine
Lysine
Methionine
Phenylalanine
Threonine
Tryptophan
Valine

Conditionally Essential Amino Acids

Some amino acids are considered conditionally essential. Under normal conditions, dogs should be able to produce enough of them. But in certain situations, like times of stress, your dog's body might not be able to meet its own requirements.

Glutamine is one example of a conditionally essential amino acid in dogs.

Complete Diet: Dog Food Sources

Animal proteins are a good source of essential amino acids. A food source that has all 10 essential amino acids, or a complete amino acid profile, is called a complete protein.

Chicken is a great protein source for dogs. Beef, turkey, duck, organ meats, eggs, and fish are also good sources.

Some of these protein sources are also rich in other supportive nutrients, too. For example, beef is a good source of iron, zinc, and selenium. Salmon is rich in omega-3 fatty acids.

Dogs can also eat certain plant proteins. Examples include soy, peas, lentils, and quinoa.

The Importance of Getting Enough Essential Amino Acids

We've outlined the many ways amino acids are used by dogs. Getting enough amino acids is very important for your dog's health.

How Many Amino Acids Do Dogs Need?

The exact amino acid requirement often varies from dog to dog. It also changes over time. Growing puppies generally need more protein because they need to support higher energy levels than adult dogs.

The National Research Council recommends dogs get 25g of protein per 1,000kcal of food consumed. It can sometimes be tricky to determine if a food meets that. Another guideline, from the Association of American Feed Control Officials, recommends feeding adult dogs food with 18% protein.¹

High-quality dog foods should be formulated with these guidelines in mind. If you're unsure, consider giving your dog an amino acid supplement.

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Potential Benefits of Amino Acids

Healthy Skin

Skin and hair make up a large part of your dog's body. In fact, they can collectively account for up to 24% of your dog's body weight.

Both skin and hair are built from and rely on proteins. For example, the protein keratin is the main building block of hair and is present in the skin, too. It's formulated from the amino acids cysteine, serine, and glycine.

As such, research shows that amino acids are important for maintaining healthy skin and coat. For example, one 2024 paper noted that "the development of a healthy coat" and "healthy skin critically depends on" amino acids, including essential amino acids like arginine and histidine.²

An earlier review similarly concluded that essential amino acid deficiencies can undermine skin function.³

Immune Support

As we mentioned, proteins are used to make antibodies. In fact, antibodies are literally specialized proteins. Amino acids are therefore important for maintaining normal immune function.

Research has confirmed this. One 2021 review concluded that certain amino acids, called functional amino acids, support immune system function and can even help enhance the immune response.⁴

A 2023 paper similarly stressed that amino acids "are essential for immune responses" in dogs.⁵ In part, that's because they are used to synthesize glutathione, an antioxidant with immune-enhancing effects.⁶

Gut Health

Research also suggests that amino acids can help support a healthy gut. As we mentioned, amino acids are used to synthesize enzymes, including the digestive enzymes that help break down food. Amino acids are also used to maintain the intestinal barrier.

One 2025 review concluded that amino acids can act as biomarkers of gut health in dogs.⁷ A study from 2023 found similar results.⁸

In part, this is because amino acids may help dogs maintain proper gut flora. Dog digestion relies on helpful bacteria, which in turn need support. One 2025 study found that animal-based proteins like fish and poultry can support these helpful bacteria.⁹

Where to Get Amino Acid Supplements

As you can see, essential amino acids are incredibly important for your dog's health. It's vital that your dog's diet meets their nutritional requirements. Supplements are a great way to support that healthy diet.

One excellent option is Earth Buddy's Liposomal Glutathione. We already mentioned some of the potential benefits of glutathione, which range from supporting the immune system to detoxification to a healthy gut.

The only problem is that glutathione can be destroyed by the digestive system. Earth Buddy's first-of-its-kind formulation encapsulates glutathione in tiny lipid bubbles, protecting it and ensuring it reaches your dog's cells, where it's actually needed.

This Liposomal Glutathione formula also contains L-Glycine, an important amino acid, L-Lysine, an essential amino acid, and L-Glutamine, a conditionally essential amino acid we discussed earlier.

All this is further blended with other supportive ingredients, including acetyl cysteine, alpha lipoic acid, and milk thistle extract.

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Conclusion

Amino acids are vital for health and wellness. Essential amino acids are those that your dog needs to get from their diet. Supplements can also help them get enough amino acids.

Frequently Asked Questions

Are Amino Acids Good for Dogs?

Amino acids aren't just good for dogs. They are essential for your dog's health and wellness. Amino acids are used to synthesize proteins, which are used throughout the body, from repairing tissues to constructing enzymes to supporting the immune system and more.

What Foods Are High In Amino Acids for Dogs?

Animal proteins are good sources of amino acids in dogs. Poultry, beef, fish, and eggs are all popular examples. Some plant proteins, like soy and lentils, are also good options.

What Is the 90-10 Rule for Dogs?

The 90-10 rule is a guideline for balancing your dog's diet. It holds that about 90% of the calories your dog consumes each day should come from meals. No more than 10% should come from snacks or treats.

Keep Reading: What Age Do Dogs Calm Down? What You Need to Know

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Amino Acids for Dogs: Everything to Know

Key Takeaways

Essential Amino Acids