Every 100 kcal of oat bran brings 7 g of protein. On that measure it ranks 2nd of the 111 grains in this database and 338th of all 796 foods on the site. Measured by weight instead, its 17.3 g per 100 g ranks 2nd in its group.
Around 28% of the calories in oat bran come from protein, so it is moderately protein-dense. It contributes to a day's protein total, but the bulk of what it delivers is energy rather than amino acids - treat it as a contributor alongside a denser source, not as the protein in a meal.
Weight for weight, oat bran has 2.5 g of protein for each gram of fat (17.3 g against 7.03 g per 100 g).
Set against grape-nuts, another grain entry in the database, a serving carries about 3.3 g more protein (grape-nuts has 13 g per 1 cup).
It is an incomplete protein on its own; pairing it with other plant foods across the day covers the full range of essential amino acids. The serving quoted here is measured by volume at 94 g, and it covers about 33% of the 50 g FDA Daily Value for protein.
The outer layer of the oat groat, richer in protein than rolled oats.
Serving sizes
Protein in common portions of oat bran
Protein and calories in Oat bran for 100 g, the site serving and USDA household portions.
Portion
Weight
Protein
Calories
100 g
100 g
17.3 g
246 kcal
1 cup (serving used here)
94 g
16.3 g
231 kcal
The USDA record lists no other household measure for this food; protein and calories scale from the per-100 g figures.
Amino acids
Essential amino acids in oat bran
The nine essential amino acids in Oat bran, per 100 g, per serving and per gram of protein.
Amino acid
Per 100 g
Per serving
mg per g protein
leucine
1.37 g
1.29 g
79
lysine
0.76 g
0.71 g
44
valine
0.964 g
0.91 g
56
isoleucine
0.668 g
0.63 g
39
threonine
0.502 g
0.47 g
29
phenylalanine
0.908 g
0.85 g
52
methionine
0.335 g
0.31 g
19
histidine
0.41 g
0.39 g
24
tryptophan
0.335 g
0.31 g
19
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.
17.3 g. The 1 cup serving used on this page weighs 94 g and so carries 16.3 g.
How much protein do you get per 100 calories of oat bran?
7 g. That figure divides its 17.3 g of protein per 100 g by its 246 kcal per 100 g, so it does not depend on serving size.
Is the protein in oat bran complete?
No. On its own, the protein in oat bran is short of at least one essential amino acid; other protein sources across the day fill the gap.
What share of the protein Daily Value is one serving of oat bran?
About 33%. One 1 cup serving has 16.3 g, and the FDA Daily Value for protein is 50 g.
Figures from USDA FoodData Central record #168872 (Oat bran, raw), 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.