Table 3. Comparison of free amino acid contents of three types of kombucha

Contents¹⁾ (mg/100 mL)	Samples²⁾
Contents¹⁾ (mg/100 mL)	CT	ST	ST+GS
Non-essential amino acids
Taurine	0.20±0.01^b	ND³⁾	7.00±0.21^a
Proline	0.62±0.02^b	ND	6.29±0.19^a
Aspartic acid	1.43±0.04^c	5.57±0.17^b	15.83±0.47^a
Serine	1.20±0.04^c	3.33±0.10^b	7.86±0.24^a
Aspartic acid - NH₂	2.12±0.06^c	9.50±0.29^b	27.37±0.82^a
Glutamic acid	0.84±0.03^c	1.73±0.05^b	4.02±0.12^a
Sarcosine	1.79±0.05^c	2.85±0.09^b	3.60±0.11^a
Aminoadipic acid	ND	0.51±0.02^b	3.19±0.10^a
Glycine	0.64±0.02^b	29.83±0.89^a	31.50±0.95^a
Alanine	0.72±0.02^c	5.26±0.16^b	11.24±0.34^a
Citrulline	ND	ND	5.86±0.18^a
Cystine	ND	ND	5.47±0.16^a
Tyrosine	ND	0.49±0.01^b	5.29±0.16^a
β-Alanine	1.38±0.04^c	1.79±0.05^b	3.63±0.11^a
β-Aminoisobutyric acid	ND	ND	3.49±0.10^a
γ-Aminobutyric acid	0.51±0.02^c	1.52±0.05^b	15.99±0.48^a
Aminoethanol	ND	ND	1.98±0.06^a
Ornithine	0.97±0.03^c	2.20±0.07^b	58.68±1.76^a
3-Methylhistidine	ND	ND	1.18±0.04^a
Total	12.42±0.38^c	69.07±1.95^b	219.47±6.6^a
Essential amino acids
Threonine	0.36±0.01^c	1.84±0.06^b	5.91±0.18^a
Valine	1.98±0.06^c	3.73±0.11^b	9.45±0.28^a
Methionine	0.04±0.00^c	0.21±0.01^b	3.50±0.11^a
Isoleucine	0.91±0.03^c	2.05±0.06^b	9.76±0.29^a
Leucine	1.53±0.05^c	3.54±0.11^b	10.09±0.30^a
Phenylalanine	1.11±0.03^c	2.47±0.07^b	9.02±0.27^a
Lysine	0.55±0.02^c	1.99±0.06^b	4.20±0.13^a
Histidine	ND	ND	ND
Total	6.48±0.20^c	15.83±0.48^b	53.91±1.56^a
Total amino acids	18.90±0.58^c	84.90±2.43^b	273.38±8.16^a

Values are mean±SD (n=3). Means with different superscript letters within each row are significantly different supscripbetween samples for the same index (p<0.05) by Duncan’s multiple range test.
CT, control kombucha; ST, strawberry kombucha; ST+GS, strawberry kombucha containing ginseng sprout concentrate.
ND, not detected.