Milk Amino Acid Profile

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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.

milk protein amino acid profile

(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.

About the author

Dale C.

Your friendly neighborhood vegan from Toronto. Chemical engineer turned semi-professional soccer player and freelance writer. Trying to do my small part in making the world better by writing about the wonderful world of veganism.

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