Table 1.

Comparison of bacterial cell count (cfu/g) label claims and enumeration results on de Man, Rogosa and Sharpe (MRS) medium in aerobic (AER) and anaerobic (ANA) conditions

Product1	Claimed	Lot	Day 1		Day 14
			MRS AER	MRS ANA	MRS AER	MRS ANA
A	NA2	1	2.03 × 108 ± 6.77 × 107	1.02 × 109 ± 6.62 × 107	7.53 × 108 ± 4.74 × 106	1.37 × 109 ± 2.97 × 108
		2	1.66 × 108 ± 5.62 × 107	1.36 × 109 ± 2.22 × 108	8.71 × 109 ± 7.72 × 109	1.80 × 1010 ± 3.84 × 108
B	NA	1	4.74 × 108 ± 2.81 × 108	<2.0 × 106	8.49 × 108 ± 1.66 × 107*	9.92 × 108 ± 6.24 × 108
		2	5.46 × 108 ± 3.08 × 108	5.84 × 108 ± 1.66 × 107	2.56 × 108 ± 5.62 × 107*	8.81 × 108 ± 8.63 × 107
C	1.00 × 1011	1	2.24 × 107 ± 1.00 × 10−3	1.71 × 108 ± 1.73 × 108	1.43 × 107 ± 1.00 × 10−3	3.46 × 107 ± 1.15 × 107
		2	2.04 × 107 ± 1.44 × 107	7.13 × 107 ± 8.65 × 106	2.55 × 107 ± 1.44 × 106	6.83 × 107 ± 1.44 × 106
D	1.00 × 109	1	1.89 × 108 ± 7.64 × 107	5.67 × 108 ± 1.18 × 107	2.69 × 108 ± 1.00 × 10−3	3.69 × 108 ± 8.99 × 106
		2	8.97 × 107 ± 1.00 × 10−3	3.59 × 108 ± 2.31 × 107	1.86 × 108 ± 5.62 × 107	1.20 × 109 ± 6.24 × 107
E	3.00 × 1010	1	1.45 × 109 ± 3.95 × 108	1.10 × 109 ± 9.74 × 107	1.69 × 109 ± 4.07 × 107	1.67 × 109 ± 1.00 × 10−3
		2	1.55 × 109 ± 1.44 × 108	1.28 × 109 ± 2.57 × 108	1.00 × 109 ± 7.10 × 106	9.36 × 108 ± 2.60 × 107
YOG	1.00 × 1010	1	5.12 × 109 ± 1.00 × 10−3	5.71 × 109 ± 2.51 × 108	3.14 × 109 ± 2.12 × 108	4.08 × 109 ± 7.94 × 107
		2	9.00 × 109 ± 1.08 × 109	1.19 × 1010 ± 6.96 × 109	4.64 × 109 ± 1.01 × 109	1.09 × 1010 ± 1.30 × 109

¹Product A: Maple Hill Plain Kefir; product B: Siggi's Plain Filmjölk; product C: Redwood Hill Farm Plain Goat Milk Kefir; product D: CoYo Kefir; product E: Lifeway Original Kefir; YOG: Chobani Plain Yogurt 0% Milk Fat.

²Not available.

^*Indicates a significant difference from d 1 to d 14 (P < 0.05 by paired Student's t-test).