Table 1: Stability of the constituents procyanidin B2 (PB2) and epicatechin (EP) of the dried extract of Guazuma ulmifolia. Mean ± SD (RSD %).

Days of storageCE (mg/mg)CEA (mg/mg)
PB2EPPB2EP

Time zero (3.8) (1.9) (2.3) (3.2)
2 (5.1) (4.5) (1.0) (4.4)
7 (4.6) (3.2) (4.4) (1.9)
14 (9.4) (1.7) (4.2) (3.4)
21 (9.0) (9.1) (6.6) (2.8)