Manganese is a mineral your dog's body requires in minimal quantities. It aids in the digestion and absorption of carbohydrates and proteins. Manganese can also promote over 300 enzyme processes, including converting fatty acids and energy from your dog's food.

Other critical roles of manganese are contributing to your dog's skeletal structure,  keeping his kidneys and liver in good working order, and developing and maintaining strong and healthy ligaments.

Manganese also benefits your dog's brain health by preventing oxidation, which releases free radicals that harm your dog's body and brain's cells, proteins, and DNA. 

Although dogs require it in relatively small amounts, manganese is critical in many physiological processes throughout the body.

Manganese is crucial for bone development and maintenance. It contributes to forming healthy bone tissue, regulating bone density, and overall skeletal health. It is also essential for the health of your dog's ligaments. 

Manganese synthesizes mucopolysaccharides necessary for maintaining healthy connective tissues, cartilage, and joint health. Many dogs that experience cranial cruciate ligament tears, similar to the ACL tears in people, have a manganese deficiency.

Many enzymes involved in the metabolic pathways, including the metabolism of proteins, carbohydrates, and fat to produce energy, require manganese. Your dog needs manganese to produce manganese superoxide dismutase (MnSOD), an antioxidant enzyme that helps protect cells from oxidative stress by neutralizing harmful free radicals. 

Other crucial functions of manganese include developing and maintaining the reproductive organs, maintaining the digestive tract tissues, maintaining the neurological system, and supporting wound healing through collagen synthesis.

Manganese requirements are influenced by age, activity level, and overall health of your dog. During the growth phase, puppies have increased manganese requirements to support the development of their bones, cartilage, and other tissues. 

The NRC recommends a minimum of around 1.2 mg of manganese per kg of body weight per day for adult dogs. Puppies, pregnant dogs, and lactating dogs have higher manganese requirements due to the demands of growth and reproduction, approximately 2.0 to 3.5 mg of manganese per kg of body weight per day.

Other factors that play into your dog's manganese requirements include overall health, medical conditions, prescription medications, and nutrient interactions. Dogs with gastrointestinal disorders, such as inflammatory bowel disease (IBD), pancreatitis, or chronic diarrhea, have impaired nutrient absorption, including minerals. These conditions can affect the lining of the gastrointestinal tract, reducing its ability to absorb minerals properly.

Dietary factors can influence mineral absorption. High levels of dietary iron can compete with manganese for absorption in the gastrointestinal tract, creating a manganese deficiency in your dog. Calcium can also compete with manganese for absorption and vice versa if the intake is too high for either mineral. 

Commercial dog food often includes whole grains, legumes, and nuts that contain phytates. Phytates bind to certain minerals, including manganese, forming phytate-mineral complexes. When attached to phytates, the bioavailability of manganese is reduced because they are less readily absorbed in the gastrointestinal tract.

The same problem can occur if your dog eats too many foods with oxalates because they bind with manganese, reducing its bioavailability. Oxalates are found in spinach, rhubarb, and beets.

Although manganese deficiency is rare, a prolonged deficiency can cause severe health problems. 

Because manganese plays a role in bone development and maintenance, deficiencies can lead to skeletal abnormalities, such as weakened bones and growth abnormalities, particularly in growing puppies. 

Joints are also affected as the ligaments rely on manganese for proper development. A manganese deficiency can exacerbate joint diseases like hip dysplasia and osteoarthritis. If there is a manganese deficiency, the cranial cruciate ligaments of your dog's knees are prone to tears.

If manganese is deficient, breeding females can have infertility issues, difficulties during pregnancy, and impaired fetal development. 

Other health problems with manganese deficiency include diarrhea, poor nutrient absorption, and skin issues like dermatitis and dry, flaky skin. Your dog's immune system can be weakened, resulting in being more susceptible to infections. 

All of the components of the Real Ancestral 6X Diet™, muscle meat, raw meaty bones, organ meat including liver and another secreting organ, fish, and fur, all contain manganese. When feeding a biologically appropriate diet to your dog, there is little chance of a manganese deficiency!

Of the Real Ancestral diet components, the liver has the highest levels of manganese. Other whole food sources for manganese include blue mussels, which have ten times the manganese of liver, and hemp seeds, with more than 20 times the manganese of liver. Hemp seeds should be given in moderation to avoid intestinal upset in your dog. 

Furred items such as the ears of rabbits, cows, lambs, or wild boars and rabbits' feet are a natural source of manganese for dogs. These all-natural, air-dried chews are available from Real Dog Box. 

In the wild, fur is a natural component of a canid's diet. Wild dogs eat the fur of their prey, such as rabbits, rodents, or other small mammals. Bacillus spp., a common bacteria within the gut microbiome, produces keratinase, an enzyme that degrades keratin, allowing the minor extraction of the fur's vitamin and mineral content to be available to your dog. 

Manganese can also be found in cloves, ginger, cilantro, coconut meat, broccoli, pumpkin seeds,  green tripe, green leafy vegetables, and nuts.

Although needed in minute quantities, manganese is a crucial mineral for your dog.

Manganese is essential for healthy joints, including the ligaments and cartilaginous components. Dogs with a manganese deficiency are more prone to cranial cruciate ligament tears. 

Fur is an excellent all-natural source of manganese for dogs.

Successful Management of Severe Manganese Toxicosis in Two Dogs 

Investigation of manganese homeostasis in dogs with anaemia and chronic enteropathy   

Effect of supplementation of organic manganese on reproductive performance of female Ussuri raccoon dogs (Nyctereutes procyonoides) during the breeding season   

Micronutrients: Minerals and Vitamins in Small Animal Clinical Nutrition 5th Edition   

Diet and dog characteristics affect major and trace elements in hair and blood of healthy dogs - PMC   

Effects of an orally administered mixture of chondroitin sulfate, glucosamine hydrochloride and manganese ascorbate on synovial fluid chondroitin sulfate 3B3 and 7D4 epitope in a canine cruciate ligament transection model of osteoarthritis  

Concentrations of manganese, iron, and strontium in bones of the domestic dog (Canis lupus familiaris)    

ZINC, COPPER AND MANGANESE DEFICIENCIES AND THE RUMINANT SKELETON: A REVIEW    

Nutrient Composition of Whole Vertebrate Prey (Excluding Fish) Fed in Zoos • AZA Nutrition Advisory Group   

Biodegradation of Hard Keratins by Two Bacillus Strains - PMC    

In vitro synergistic effects of three enzymes from Bacillus subtilis CH-1 on keratin decomposition - PMC   

Manganese deficiency and CCL disease | Animal Wellness Magazine   

Manganese is a trace mineral, meaning it is required in small amounts, but its impact on a dog’s physiology is significant. It plays a central role in macronutrient metabolism by supporting the digestion and utilization of carbohydrates, proteins, and fats. At the cellular level, manganese functions as a cofactor for hundreds of enzymatic reactions that drive energy production, tissue repair, and overall metabolic efficiency.

Beyond metabolism, manganese is essential for the development and maintenance of structural integrity. It contributes to proper bone formation and density, while also supporting connective tissues such as ligaments and tendons. Adequate manganese status is necessary to maintain the normal function of vital organs, including the liver and kidneys, which rely on these enzyme systems for detoxification and filtration.

Manganese also plays a protective role in neurological health. It is a key component of antioxidant enzymes that help neutralize reactive oxygen species. Without sufficient manganese, oxidative stress can increase, leading to cellular damage affecting proteins, lipids, and DNA, particularly in the brain, where metabolic activity is high.

Although dogs require manganese in relatively small amounts, its role in the body is far from minor. It is involved in a wide range of physiological processes that support structure, metabolism, and cellular protection.

One of its most important roles is in skeletal health. Manganese contributes to bone formation and maintenance by supporting proper bone density and structural integrity. It is equally important for connective tissues, including ligaments and tendons, which rely on manganese-dependent processes to remain strong and resilient.

Manganese is also required for the synthesis of mucopolysaccharides, compounds that are essential for healthy cartilage and joint function. When manganese intake is inadequate, the integrity of connective tissues can be compromised. This is one reason deficiency has been associated with conditions such as cranial cruciate ligament injuries, which parallel ACL tears in humans.

At the metabolic level, manganese acts as a cofactor for numerous enzymes that drive the conversion of proteins, carbohydrates, and fats into usable energy. It is also necessary for the production of manganese superoxide dismutase, a critical antioxidant enzyme that helps protect cells from oxidative stress by neutralizing reactive oxygen species.

In addition to these core functions, manganese supports reproductive health, helps maintain the integrity of digestive tract tissues, and plays a role in normal neurological function. It is also involved in collagen formation, making it an important contributor to wound healing and tissue repair.

Manganese requirements are not one-size-fits-all. They vary based on a dog’s life stage, activity level, and overall health status. During periods of growth, puppies have a greater need for manganese to support the development of bones, cartilage, and other structural tissues. The same is true for pregnant and lactating dogs, whose bodies are supporting both their own needs and those of developing or nursing offspring.

According to the National Research Council, adult dogs require approximately 1.2 mg of manganese per kilogram of body weight per day. For puppies and reproductive dogs, this requirement increases to roughly 2.0-3.5 mg per kilogram of body weight per day to account for the added physiological demands.

Beyond life stage, several additional factors influence how much manganese a dog actually needs. Health conditions that affect the gastrointestinal tract, such as inflammatory bowel disease, pancreatitis, or chronic diarrhea, can impair nutrient absorption, including trace minerals like manganese. When the integrity of the gut lining is compromised, the body’s ability to absorb and utilize manganese is reduced, which can increase the risk of deficiency even if intake appears adequate.

Nutrient interactions also play a significant role. Minerals do not function in isolation, and high levels of certain nutrients can interfere with manganese absorption. Excess dietary iron can compete with manganese for uptake in the gastrointestinal tract, potentially reducing manganese status over time. Calcium has a similar competitive relationship, in which imbalances in either direction may affect absorption efficiency.

Diet composition further influences bioavailability. Ingredients commonly found in many commercial diets, such as whole grains, legumes, and nuts, contain phytates. These compounds can bind to manganese, forming complexes that are more difficult for the body to absorb. As a result, even diets that appear sufficient on paper may deliver less usable manganese at the cellular level.

A similar binding effect can occur with oxalates, which are naturally present in foods like spinach, rhubarb, and beets. When oxalates bind to manganese, they reduce its bioavailability, limiting how much is ultimately absorbed and utilized by the body.

Although manganese deficiency is considered uncommon, a prolonged shortfall can have widespread and serious consequences because manganese is involved in so many biological systems.

One of the earliest areas affected is the skeletal system. Because manganese is essential for proper bone formation and maintenance, inadequate levels can lead to weakened bone structure and abnormal growth patterns, particularly in developing puppies. These structural weaknesses do not occur in isolation and often extend to connective tissues.

Joint health is especially vulnerable. Ligaments depend on manganese for proper development and strength, and when levels are insufficient, their integrity can decline. This can worsen existing joint conditions such as hip dysplasia and osteoarthritis. In more severe cases, the cranial cruciate ligaments in the knee become more susceptible to degeneration and tearing, increasing the risk of injury even with normal activity.

Reproductive health is also impacted by manganese status. Deficiency in breeding females has been associated with reduced fertility, complications during pregnancy, and impaired fetal development. These outcomes reflect manganese’s role in cellular growth and tissue formation.

Additional signs of deficiency often appear in the gastrointestinal system and the skin. Dogs may experience diarrhea and reduced nutrient absorption, further compounding nutritional imbalances. Skin health can decline, presenting as dermatitis or dry, flaky skin. At the same time, the immune system may become less effective, leaving the dog more vulnerable to infections and slower to recover from illness.

Manganese homeostasis is tightly regulated in healthy dogs. Absorption in the gastrointestinal tract is relatively low, and excess manganese is typically excreted through bile via the liver. This natural regulation makes toxicity from whole food sources unlikely under normal feeding conditions.

Concerns arise when manganese intake is consistently elevated beyond physiological needs, particularly through over-supplementation or an imbalanced diet. High levels of manganese can interfere with the absorption and utilization of other minerals, especially iron. This antagonistic relationship may contribute to secondary imbalances over time.

In more extreme or chronic cases, excessive manganese accumulation has the potential to affect neurological function. In other species, very high manganese exposure has been associated with changes in behavior and motor function due to its impact on the central nervous system. While this is rarely documented in dogs on whole-food diets, it underscores the importance of avoiding unnecessary supplementation.

Dogs with compromised liver function may be at greater risk, as the liver plays a central role in manganese excretion. If biliary excretion is impaired, manganese can accumulate in the body more readily.

From a practical standpoint, toxicity is unlikely when manganese is provided through a variety of natural food sources within a balanced ancestral framework. The greater risk tends to come from stacking multiple manganese-rich supplements or using premixes without accounting for total dietary intake. As with all nutrients, the goal is not simply adequacy, but balance within the broader nutritional context.

All components of the <a href="https://www.feedreal.com/articles/introduction-to-real-ancestral-6x-diet">Real Ancestral 6X Diet™</a>, muscle meat, raw meaty bones, organ meats including liver and another secreting organ, fish, and fur, contribute some level of manganese. When a dog is fed a properly constructed, biologically appropriate diet that reflects this diversity, the risk of manganese deficiency remains low. That said, not all ancestral foods provide manganese in equal amounts, and understanding where it is most concentrated allows for more precise formulation.

Liver is often relied upon as a nutritional cornerstone due to its richness in copper, vitamin A, and iron, but it is not a significant source of manganese. While it does contribute small amounts, it should not be depended on to meet manganese needs. In contrast, certain whole food ingredients are naturally much richer in this trace mineral. Blue mussels stand out as one of the most concentrated ancestral sources, providing substantially higher manganese levels per weight. Hemp seeds are another dense source, although their fat and fiber content requires thoughtful inclusion to avoid digestive upset or excess caloric intake.

Furred prey represents a biologically appropriate and often overlooked source of trace minerals. In a natural setting, canids consume the entire prey animal, including fur. Items such as rabbit ears, rabbit feet, and the ears of larger animals, such as lamb or cattle, contain measurable amounts of manganese. While fur is primarily composed of keratin and is not highly digestible, portions of the canine gut microbiome are capable of producing keratinase enzymes, which allow for partial breakdown and limited mineral extraction. This reflects an evolutionary relationship between diet and digestive capability that is often absent in modern feeding approaches.

Manganese is also present in a range of whole foods beyond animal tissues. Blue mussels, hemp seeds, pumpkin seeds, green tripe, leafy greens, broccoli, coconut meat, and herbs such as cilantro and ginger all contribute varying amounts. Even certain spices, like cloves, contain notable levels in small quantities. The key is not reliance on a single ingredient, but rather the inclusion of a variety of foods that collectively meet the body’s needs.

As with all trace minerals, balance matters more than excess. Manganese requirements are modest, and a well-formulated ancestral diet that includes a diversity of tissues, seafood, and appropriate plant matter can meet those needs effectively without defaulting to synthetic supplementation.

Bringing It All Together: Manganese in the Diet

Manganese may be required in only small amounts, but its influence on a dog’s health is far-reaching. From supporting skeletal integrity and joint stability to driving enzyme function and protecting against oxidative stress, it plays a quiet but essential role in maintaining physiological balance.

For fresh feeders and veterinary professionals alike, the focus should remain on thoughtful formulation rather than isolated nutrients. A well-constructed ancestral diet that incorporates a diversity of tissues, seafood, and appropriate plant matter will naturally provide sufficient manganese without the need for routine supplementation. As with all aspects of nutrition, balance, variety, and attention to detail are what ultimately support long-term health.

Manganese for Raw Feeders

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