Milk Amino Acid Profile

The following graph shows a typical dairy milk protein amino acid profile. It’s basically the combination of whey and casein, all in one.

This graph was generated using our amino acid profile comparison tool.

(Data Source)

Here’s the data in table form if you prefer. Essential amino acids are marked with an asterisk (*).

  % of total amino acids
Alanine 3.4
Arginine 3.1
Aspartic Acid 7.4
Cystine 0.5
Glutamic Acid 21.6
Glycine 1.9
Histidine* 2.6
Isoleucine* 4.8
Leucine* 9.2
Lysine* 7.1
Methionine* 2.4
Phenylalanine* 4.8
Proline 9.4
Serine 5.5
Threonine* 4.2
Tryptophan* 0.8
Tyrosine 5.4
Valine* 6

Overall Summary of Milk Protein’s Amino Acid Profile

Dairy milk is a complete protein, as you’d probably expect.

That being said, it is relatively low on both Cystine and Tryptophan, with the second being an essential amino acid.

So while it’s a good protein source (from a nutritional standpoint), there’s nothing particularly special about it either. It's less balanced than the amino acid profiles of eggs or whey, or even plant protein sources like hemp protein.