Spirulina Amino Acid Profile


I’ve plotted a typical spirulina amino acid profile below, the essential amino acids have a star beside them (*).

This plot was created with our amino acid profile comparison tool.

spirulina amino acid profile

(Data Source)

In case it’s a bit tough to see the names, here’s the data in table form instead.

  % of total amino acids
Alanine 7.9
Arginine 7.3
Aspartic Acid 10.1
Cystine 1.2
Glutamic Acid 14.7
Glycine 5.4
Histidine* 1.9
Isoleucine* 5.6
Leucine* 8.7
Lysine* 5.3
Methionine* 2
Phenylalanine* 4.9
Proline 4.2
Serine 5.2
Threonine* 3.4
Tryptophan* 1.6
Tyrosine 4.5
Valine* 6.1

Overall Summary of Spirulina’s Amino Acid Profile

Spirulina has a great, balance profile, about as good as quinoa’s amino acid profile. It is considered a complete protein, as it has all the essential amino acids in significant amounts.

To get a sense of how it compares to animal protein sources, let’s compare it to whey.

The relative level of each amino acid is similar as in whey, except for a few exceptions. Spirulina has:

  • Relatively high levels of arginine and glycine
  • Relatively low levels of threonine and lysine
  • A slightly lower amount of glutamic acid

Remember that threonine and lysine are essential amino acids, so that’s not great for spirulina. But at the same time, they’re still comparable protein sources overall, just whey’s maybe a tiny bit better.

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.