By Weiran (Vivian) Liu

S Tier

A Tier

B Tier

C Tier

D Tier

Menu

amino acids

S
cysteine
leucine
phenylalanine
A
histidine
lysine
methionine
proline
glutamine
alanine
B
isoleucine
glycine
valine
tryptophan
serine
glutamic acid
C
aspartic acid
arginine
tyrosine
threonine
D
asparagine
Created Feb 14, 2026
Dive into the fundamental building blocks of life with this amino acid tier list! From the essential nine that our bodies can't produce, like the branched-chain powerhouses leucine and isoleucine, to the non-essential but still vital players, this ranking explores the diverse roles these molecules play. Discover where the charged titans arginine and lysine land, how the sulfur-containing cysteine and methionine stack up, and the unique structural contributions of proline. Whether you're a student of biology, a nutrition enthusiast, or just curious about what makes proteins tick, this list offers a fun perspective on these indispensable compounds.

(This description was AI-generated)