Table 2.

Concentration of Lactic Acid Measured in the Culture Medium Containing 100% Degradable Gels at Discrete Time Points

Time point (days)	Lactic acid concentration (mg/mL)
0	0.149 ± 0.022
1	0.134 ± 0.004
3	0.136 ± 0.003
6	0.172 ± 0.001
8	0.087 ± 0.002
10	0.063 ± 0.001

The culture medium removed on day indicated was tested for lactic acid concentration and indicates that lactic acid was released from the hydrogels at substantial concentrations. Data represent mean ± standard error of the mean.