Conditionally Essential Amino Acids
The Compounds (7)
Arginine
L-Arginine is a conditionally essential amino acid that plays a central role in numerous physiological processes throughout the body.
Read the deep dive →Cysteine
Cysteine is a sulfur-containing, conditionally essential amino acid that plays a central role in human health.
Read the deep dive →Glutamine
The most abundant free amino acid in blood and muscle, and the main fuel of the gut lining and immune cells.
Read the deep dive →Glycine
Glycine is the smallest and structurally simplest of the twenty standard amino acids, consisting of just a single hydrogen atom as its side chain.
Read the deep dive →Proline
Proline is a unique non-essential amino acid that plays a foundational role in the structural integrity of the human body.
Read the deep dive →Taurine
Taurine, chemically known as 2-aminoethanesulfonic acid, is a conditionally essential amino sulfonic acid that is found in extraordinarily high concentrations throughout the human body.
Read the deep dive →Tyrosine
Tyrosine is a conditionally essential amino acid that serves as the biochemical starting material for some of the most important signaling molecules in the human body.
Read the deep dive →Made by the body under normal conditions, but not fast enough during illness, injury, rapid growth or metabolic stress — which is when supplementing them is argued for. Taurine sits here rather than under Essential, where both of this site’s index pages had it: its own page opens by calling it conditionally essential, and notes it is not built into proteins at all.