Table 5. Acetaldehyde content (mg/L) of drinking yogurt samples during cold storage (mean±SD)

Sample	First day	11th day	21th day
C	21.02±0.09Ae	17.03±0.12Bd	16.50±0.09Cd
FE250	30.02±0.09Ad	19.01±0.12Bc	16.51±0.10Cd
FE500	41.13±0.08Aa	35.03±0.13Ba	29.03±0.09Ca
IE250	40.21±0.12Ab	35.01±0.10Ba	28.08±0.10Cb
IE500	30.95±0.11Ac	25.09±0.11Bb	23.20±0.09Cc

Values in the same column shown with similar lowercase letters are not significantly different.
Values in the same rows shown with similar capital letters are not significantly different.