Table 2.

High-Frequency Differential Metabolites Related to OAG

Metabolite Name	HMDB ID	Hits	Biological Samples to Be Analyzed
Arginine	HMDB0000517	4	(↑): AH22, Plasma25,26; (↓): Tear29
Glycine	HMDB0000123	3	(↑): AH21,22; (↓): Serum28
Alanine	HMDB0000161	2	(↑): AH21; (↓): Tear29
Acetylcarnitine	HMDB0000201	2	(↑): AH21; (↓): Tear29
Butyrylcarnitine	HMDB0002013	2	(↑): AH21, Plasma25
Carnitine	HMDB0000062	2	(↑): AH21; (↓): Tear29
Glutamine	HMDB0000641	2	(↑): AH21; (↓): AH22
Hypoxanthine	HMDB0000157	2	(↑): Plasma26; (↓): Serum28
Lysine	HMDB0000182	2	(↑): AH22, Serum28
Methionine	HMDB0000696	2	(↑): Plasma25; (↓): Tear29
Propionylcarnitine	HMDB0000824	2	(↑): AH21, Plasma25
PC aa C34:2	HMDB0007880	2	(↑): AH21, Plasma25
PC aa C36:4	HMDB0007982	2	(↑): AH21, Plasma25
Phenylalanine	HMDB0000159	2	(↓): AH22, Tear29
Spermine	HMDB0001256	2	(↓): AH21, Plasma25
Spermidine	HMDB0001257	2	(↓): Plasma25, AH23
Tyrosine	HMDB0000158	2	(↑): Plasma25; (↓): Tear29