Table 2.
Mean ascorbic acid concentration in human milk delivered by bottle in milligrams per liter of milk with standard deviation in (SD)
| Bottle system | 0 minutes | 5 minutes | 10 minutes | 15 minutes | 20 minutes |
| Gerber (G) | 41.93 (0.05) | 36.19 (0.18) | 26.85* (2.17) | 16.57* (3.32) | 10.33* (3.07) |
| Ventaire (V) | 41.95 (2.02) | 39.06 (0.14) | 32.90* (2.61) | 29.22* (2.97) | 22.87* (0.44) |
| Dr. Brown's (DB) | 41.87 (0.83) | 39.22 (1.08) | 38.82 (1.09) | 36.49* (4.21) | 31.83* (3.06) |
| Elan (EL) | 42.12 (3.81) | 37.51 (1.76) | 19.22* (2.06 | 8.62* (1.99) | 0.49* (0.23) |
| BornFree (BF) | 42.54 (4.83) | 36.15 (1.00) | 30.68* (2.01) | 18.42* (3.53) | 12.27* (2.92) |
| Playtex Drop-Ins (PD) | 42.66 (2.67) | 30.58 (4.60) | 21.44* (1.87) | 13.96* (3.39) | 0.77* (0.30) |
| Avent Natural (AN) | 42.44 (3.05) | 34.59 (3.89) | 24.71* (1.56) | 18.52* (3.78) | 3.90* (2.07) |
| Control | 41.98 (0.05) | 40.93 (0.66) | 40.53 (0.58) | 39.39 (1.58) | 38.32 (2.27) |
*Statistically significant at p < 0.01