. 2025 Jul 28;41(8):283. doi: 10.1007/s11274-025-04495-4

Table 4.

Oleuropein and Hydroxytyrosol content in the Olive leaf-containing broth fermented by the five LAB strains over 28 days

Analysis time (days)	Oleuropein (mg L^− 1)
Analysis time (days)	B415	B506	B307	PB22	B329	Sign
3	23.02 ± 26.70^A	12.35 ± 1.27^aAB	19.56 ± 17.24^A	13.75 ± 0.52^cB	18.13 ± 0.13^aB	**
7	35.97 ± 34.26^A	16.18 ± 0.54^cB	28.64 ± 17.83^A	17.09 ± 0.98^abB	17.73 ± 0.35^bB	**
14	20.38 ± 20.71^A	10.61 ± 0.77^abB	26.11 ± 6.52^A	18.72 ± 0.88^aB	15.44 ± 0.08^bB	**
21	27.27 ± 9.77^A	10.15 ± 0.56^bA	27.91 ± 3.58^B	14.26 ± 0.59^cB	18.29 ± 0.08^aB	**
28	28.84 ± 11.19^A	10.79 ± 0.08^abB	25.76 ± 2.62^A	16.51 ± 0.37b^BC	14.75 ± 0.21^cC	**
Sign	n.s.	**	n.s.	**	**
Analysis time (days)	Hydroxytyrosol (mg L^− 1)					Sign
3	87.70 ± 7.75^AB	112.19 ± 15.56^aA	92.04 ± 4.35^aAB	56.32 ± 1.22^aB	60.42 ± 0.68^aB	**
7	80.13 ± 12.61^AB	100.49 ± 13.96^abA	87.93 ± 0.81^abAB	54.67 ± 0.93^aAB	50.9 ± 0.93^bB	*
14	52.09 ± 2.14	72.171 ± 1.16^bc	59.14 ± 6.28^bc	59.59 ± 9.72^a	52.38 ± 1.13^b	n.s.
21	50.06 ± 3.77^A	66.24 ± 8.40^cB	35.12 ± 4.24^cdBC	34.65 ± 0.71^bBC	32.5 ± 1.21^cC	**
28	36.63 ± 2.96^AB	52.15 ± 7.50^cA	25.51 ± 1.97^dB	33.31 ± 0.81^bB	24.41 ± 0.93^dB	**
Sign	n.s.	**	**	**	**

The data are presented as means ± SDs. **Significance at P < 0.01; *Significance at P < 0.05; n.s. not significant. By Tukey’s multiple range test, small letters show differences during the time for all samples and capital letters show differences among the samples at the same time