Protein content
4 g of protein in 1 medium (173 g) of red potatoes, or 2.6 g for every 100 kcal it supplies.
Share of this food's calories that come from protein - it is more of an energy food than a protein food.
| Protein per 100 kcal | 2.6 g |
|---|---|
| Protein per 100 g | 2.3 g |
| Protein per serving | 4 g in 1 medium (173 g) |
| Calories from protein | 11% |
| Leucine per serving | 0.19 g |
| Rank in vegetables, per 100 kcal | 79th of 105 |
| Rank of all foods, per 100 g | 660th of 796 |
| Share of 50 g Daily Value | 8% per serving |
| Protein quality | Incomplete protein |
One 1 medium, 4 g protein.
Every 100 kcal of red potatoes brings 2.6 g of protein. On that measure it ranks 79th of the 105 vegetables in this database and 644th of all 796 foods on the site. Measured by weight instead, its 2.3 g per 100 g ranks 42nd in its group.
Only about 11% of the calories in red potatoes come from protein, so it is more of an energy food than a protein food. It is worth eating for other reasons; the protein it adds to a day is incidental.
USDA lists 0.15 g of fat per 100 g of red potatoes, too little for a protein-to-fat ratio to mean much.
Set against artichoke, another vegetable entry in the database, a serving carries about 0.5 g more protein (artichoke has 3.5 g per 1 medium).
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 counted by piece at 173 g, and it covers about 8% of the 50 g FDA Daily Value for protein.
Serving sizes
| Portion | Weight | Protein | Calories |
|---|---|---|---|
| 100 g | 100 g | 2.3 g | 87 kcal |
| 1 medium (serving used here) | 173 g | 4 g | 151 kcal |
| 1 potato large (3" to 4-1/4" dia. | 299 g | 6.9 g | 260 kcal |
| 1 potato small (1-3/4" to 2-1/2" dia.) | 138 g | 3.2 g | 120 kcal |
Portion weights are the household measures listed on the USDA record; protein and calories scale from the per-100 g figures.
Amino acids
| Amino acid | Per 100 g | Per serving | mg per g protein |
|---|---|---|---|
| leucine | 0.109 g | 0.19 g | 47 |
| lysine | 0.12 g | 0.21 g | 52 |
| valine | 0.115 g | 0.2 g | 50 |
| isoleucine | 0.074 g | 0.13 g | 32 |
| threonine | 0.075 g | 0.13 g | 33 |
| phenylalanine | 0.091 g | 0.16 g | 40 |
| methionine | 0.035 g | 0.06 g | 15 |
| histidine | 0.039 g | 0.07 g | 17 |
| tryptophan | 0.023 g | 0.04 g | 10 |
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.
Related
Highest-protein vegetables per serving · Most protein-dense foods · Highest protein per 100 g
Quick answers
2.3 g. The 1 medium serving used on this page weighs 173 g and so carries 4 g.
2.6 g. That figure divides its 2.3 g of protein per 100 g by its 87 kcal per 100 g, so it does not depend on serving size.
No. On its own, the protein in red potatoes is short of at least one essential amino acid; other protein sources across the day fill the gap.
About 8%. One 1 medium serving has 4 g, and the FDA Daily Value for protein is 50 g.
Figures from USDA FoodData Central record #170435 (Potatoes, red, flesh and skin, baked), 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.