Every 100 kcal of beef liver brings 15.2 g of protein. On that measure it ranks 43rd of the 133 meats in this database and 133rd of all 796 foods on the site. Measured by weight instead, its 29.1 g per 100 g ranks 35th in its group.
About 61% of the calories in beef liver come from protein, which makes it extremely protein-dense - close to the practical ceiling for a whole food. Foods in this band are the ones that let you raise your protein intake without raising your calorie intake much at all.
Weight for weight, beef liver has 5.5 g of protein for each gram of fat (29.1 g against 5.26 g per 100 g).
Set against beef sirloin steak, another meat entry in the database, a serving carries about 0.5 g less protein (beef sirloin steak has 25.2 g per 3 oz cooked).
It is a complete protein - it supplies all nine essential amino acids in adequate amounts, so it can carry a meal's protein on its own. The serving quoted here is measured by weight at 85 g, and it covers about 49% of the 50 g FDA Daily Value for protein.
Exceptionally dense in vitamin A and B12, enough that regular large servings can push vitamin A intake too high.
Serving sizes
Protein in common portions of beef liver
Protein and calories in Beef liver for 100 g, the site serving and USDA household portions.
Portion
Weight
Protein
Calories
100 g
100 g
29.1 g
191 kcal
3 oz cooked (serving used here)
85 g
24.7 g
162 kcal
1 slice
68 g
19.8 g
130 kcal
Portion weights are the household measures listed on the USDA record; protein and calories scale from the per-100 g figures.
Amino acids
Essential amino acids in beef liver
The nine essential amino acids in Beef liver, per 100 g, per serving and per gram of protein.
Amino acid
Per 100 g
Per serving
mg per g protein
leucine
2.67 g
2.27 g
92
lysine
2.25 g
1.91 g
77
valine
1.76 g
1.5 g
60
isoleucine
1.35 g
1.15 g
46
threonine
1.22 g
1.04 g
42
phenylalanine
1.52 g
1.29 g
52
methionine
0.759 g
0.65 g
26
histidine
0.879 g
0.75 g
30
tryptophan
0.368 g
0.31 g
13
Per-100 g values are the amino acid analysis on the USDA record. The serving and per-gram-of-protein columns are arithmetic on those values; they are not a protein quality score.
SampleWhat goal trends look like after a week
109 g
Average per logged day
4 of 7
Days goal met
71%
Complete-protein share
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Sample figures for one made-up week against a 110 g goal, not your data. Red bars met the goal. Your own log fills this in with Premium.
29.1 g. The 3 oz cooked serving used on this page weighs 85 g and so carries 24.7 g.
How much protein do you get per 100 calories of beef liver?
15.2 g. That figure divides its 29.1 g of protein per 100 g by its 191 kcal per 100 g, so it does not depend on serving size.
Is the protein in beef liver complete?
Yes. The protein in beef liver supplies all nine essential amino acids in adequate amounts, so it can carry a meal's protein on its own.
What share of the protein Daily Value is one serving of beef liver?
About 49%. One 3 oz cooked serving has 24.7 g, and the FDA Daily Value for protein is 50 g.
Figures from USDA FoodData Central record #168626 (Beef, variety meats and by-products, liver, cooked, braised), SR Legacy data. USDA data is in the public domain. Values are the published reference figures for that record, not lab measurements for a specific brand or batch.