A typical cup of beef bone broth contains around 5 to 10 grams of protein, depending on how it’s made and how long the bones simmer. That’s roughly 7% of the daily recommended protein intake for an adult, making bone broth a modest protein source rather than a high-protein food. The exact number varies widely between homemade batches and commercial products, so understanding what drives those differences helps you know what you’re actually getting.
What Affects the Protein Content
The protein in bone broth comes almost entirely from collagen, the connective tissue protein that slowly breaks down from bones, joints, and cartilage during cooking. The longer you simmer, the more collagen dissolves into the liquid. A broth simmered for 8 hours will have noticeably less protein than one cooked for 24 hours. The type of bones matters too: knuckle bones, oxtail, and marrow bones with lots of connective tissue yield more protein than bare, smooth bones like femur shafts.
Water ratio is the other major variable. More water means a thinner broth with less protein per cup. A concentrated, gel-like broth that solidifies in the fridge is a sign of high collagen extraction, and that batch will sit at the higher end of the protein range. A lighter, more watery broth may land closer to 2 or 3 grams per cup.
Commercial Brands vs. Homemade
Store-bought bone broths marketed specifically as “bone broth” (rather than regular stock or broth) tend to land between 8 and 10 grams of protein per cup. Premium brands like Brodo, for example, list 10 grams of protein per one-cup serving with 45 calories. Budget brands or products labeled simply as “broth” often contain less, sometimes as low as 2 to 4 grams per cup.
Homemade bone broth is harder to pin down because every batch is different. A study evaluating commercial beef bone broth products found an average of about 4.6 grams of protein per serving, with a wide range depending on the product. If you’re making it at home, the gelatin test is your best indicator: if the cooled broth jiggles like Jell-O, you’ve extracted a meaningful amount of collagen protein. If it stays liquid in the fridge, the protein content is on the low side.
The Amino Acid Breakdown
Bone broth protein has a distinctive amino acid profile that looks nothing like the protein in a steak or an egg. The dominant amino acids are glycine, proline, hydroxyproline, and glutamine, all of which come from collagen. In beef bone broth specifically, glycine is the most abundant at roughly 3.7 milligrams per gram of broth, followed by glutamine at about 2.6 mg/g, proline at 2.2 mg/g, and hydroxyproline at 2.0 mg/g.
These amino acids play specific roles in the body. Glycine is involved in sleep regulation and the production of glutathione, one of the body’s main protective compounds. Proline and hydroxyproline are building blocks for your own collagen, which forms the structure of skin, tendons, and joint cartilage. Glutamine fuels the cells lining your intestines and supports gut barrier integrity.
What bone broth lacks is equally important. It’s low in essential amino acids like leucine, isoleucine, and tryptophan, the ones your body can’t make on its own and needs from food. This means bone broth is not a complete protein source and shouldn’t be your primary way of hitting a daily protein target.
Bone Broth as a Protein Source: Realistic Expectations
At 5 to 10 grams per cup, bone broth delivers about as much protein as a single egg or half a cup of milk. For comparison, a palm-sized serving of cooked beef provides around 25 to 30 grams. You’d need to drink three to six cups of bone broth to match a single chicken breast, and even then the protein quality would be lower because of the missing essential amino acids.
This doesn’t mean bone broth is nutritionally empty. It provides a type of protein (collagen-derived) that most people don’t get much of from other foods. The glycine and glutamine in bone broth have been shown to help maintain the intestinal lining, reduce intestinal permeability (sometimes called “leaky gut”), and help regulate inflammation, particularly in people with inflammatory bowel conditions. These benefits come from the specific amino acid profile, not from the total grams of protein.
Think of bone broth as a supplemental protein source with unique benefits rather than a protein powerhouse. It adds value alongside protein-rich foods but doesn’t replace them. If you’re sipping it for gut health, joint support, or as a low-calorie way to add some protein to your day, a cup or two delivers meaningful amounts of the amino acids that matter most for those goals. If you’re trying to build muscle or meet a high protein target, you’ll need to pair it with more complete protein sources.
How to Maximize Protein in Homemade Broth
If you’re making bone broth at home and want to push the protein content higher, a few adjustments help. Use bones with plenty of cartilage and connective tissue: beef knuckles, oxtails, short ribs, and neck bones are ideal. Adding chicken feet to a beef broth is a common trick for boosting gelatin content.
Simmer for at least 12 hours, and up to 24 for beef bones. Use just enough water to cover the bones by an inch or two rather than filling the pot. A splash of apple cider vinegar (about two tablespoons per pot) early in the cooking process helps draw minerals and collagen from the bones, though the effect is modest. After straining, you can reduce the broth by simmering it uncovered, which concentrates the protein per cup. A well-made, reduced beef bone broth can reach 12 to 15 grams of protein per cup, putting it in the range of the best commercial products.