Effects of L-ascorbate supplementation on ACh (a–c) and on A23187 (d–f) relaxant responses in the presence of 100 mg protein l−1 nLDL (a and d), dLDL (b and e) and oxLDL (c and f). Responses are shown in the absence of LDL, and in the presence of LDL either alone or with L-ascorbate 10−5, 10−4 or 10−3 M. **,***P<0.01 and <0.001 as compared with the absence of LDL. #,##,###P<0.05, <0.01 and <0.001 as compared with LDL alone.