Myoglobin

Myoglobin in Raw Feeding: What It Is and Why It Matters

If you’ve ever opened a pack of minced meat or offal and noticed a red liquid pooling at the bottom, it’s easy to assume it’s blood. In reality, this liquid is a mixture of water and myoglobin — a naturally occurring protein found in muscle tissue. Understanding what myoglobin is, how it behaves, and why it appears in raw food can help you make more informed choices when preparing your dog’s meals.

What Is Myoglobin?

Myoglobin is an oxygen‑binding protein stored within muscle cells. Its role is to hold and release oxygen where it’s needed during movement and activity. While haemoglobin transports oxygen through the bloodstream, myoglobin works at the muscular level, supporting energy production and normal muscle function.

Because myoglobin contains iron, it has a naturally deep red colour — which is why the liquid in raw meat often looks like blood even though it isn’t.

Why Meat Colour Varies

The amount of myoglobin in an animal’s muscles directly influences the colour of the meat:

• Dark red meats (beef, venison, lamb) contain higher levels of myoglobin.

• Lighter meats (poultry, some fish) contain much less, resulting in paler flesh.

When exposed to air, myoglobin undergoes oxidation — a natural chemical change that can shift meat from bright red to brownish over time. This colour change is normal and not an indicator of spoilage on its own.

Nutritional Value of Myoglobin for Dogs

Many raw feeders pour away the red liquid, but it actually contains beneficial nutrients naturally present in meat:

• Iron – contributes to normal red blood cell formation.

• Proteins & enzymes – support general cellular and muscular function.

• Water‑soluble nutrients – naturally present in raw meat and easily lost if discarded.

Because these nutrients are part of the whole food matrix, many raw feeders choose to retain the liquid and mix it back into meals.

Tip: Some owners freeze myoglobin-rich liquid in silicone moulds to portion it easily and reduce waste.

Myoglobin’s Role in a Raw Diet

Including all natural components of raw meat — including the myoglobin-rich liquid — can help support:

• Healthy muscle development through natural proteins found in meat.

• Digestive well‑being, as whole-food nutrients complement raw feeding.

• Energy and recovery, since iron and proteins play roles in normal metabolic processes.

These benefits come from the natural nutritional profile of raw meat itself, not from myoglobin acting as a supplement or treatment. Keeping the liquid simply preserves what is already part of the food.

Why You Don’t Need to Drain It Away

Myoglobin is not blood, nor is it a waste product. It’s a natural part of raw meat and contributes to its nutritional value. Retaining it helps ensure your dog receives the full spectrum of nutrients present in the food you’re already feeding.

For raw feeders who value using every part of the ingredient, keeping the myoglobin-rich liquid is an easy, practical way to maximise the nutritional completeness of each meal.