Whey protein isolate: amino acid profile
powder · Gorissen et al. 2018, Amino Acids 50:1685-1695 (commercial whey isolate), scaled to 90% protein
How much protein and leucine does it contain?
Per 100 g, Whey protein isolate provides 90.0 g protein and 9.21 g leucine. Use the listed preparation when comparing portions.
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The first column of amounts is per 100 g of food; the second compares the composition of the protein itself.
| Amino acid | g / 100 g | g / 100 g protein |
|---|---|---|
| Leucine Essential (BCAA) | 9.21 | 10.2 |
| Isoleucine Essential (BCAA) | 4.07 | 4.5 |
| Valine Essential (BCAA) | 3.75 | 4.2 |
| Lysine Essential | 7.61 | 8.5 |
| Threonine Essential | 5.79 | 6.4 |
| Phenylalanine Essential | 2.68 | 3.0 |
| Methionine Essential | 1.93 | 2.1 |
| Histidine Essential | 1.50 | 1.7 |
| Tryptophan Essential | 1.80 | 2.0 |
| Glutamic acid Non-essential | 16.61 | 18.5 |
| Aspartic acid Non-essential | 10.50 | 11.7 |
| Proline Non-essential | 5.14 | 5.7 |
| Alanine Non-essential | 4.50 | 5.0 |
| Serine Non-essential | 4.29 | 4.8 |
| Tyrosine Non-essential | 2.57 | 2.9 |
| Arginine Non-essential | 1.82 | 2.0 |
| Cysteine Non-essential | 0.86 | 1.0 |
| Glycine Non-essential | 1.61 | 1.8 |
What do these numbers mean? Read the guide →
By Logan King and Dr Paul T Morgan, Senior Lecturer in Human Nutrition and Metabolism, Manchester Metropolitan University.
Amino acid score compares this food's scarcest essential amino acid with the WHO/FAO/UNU 2007 adult pattern; 100%+ means every essential amino acid is carried in good proportion. Data: Gorissen et al. 2018, Amino Acids 50:1685-1695 (commercial whey isolate), scaled to 90% protein. Educational reference, not medical advice.