Figure 2. Alpha linolenic acid (ALA) concentrations in plasma cholesteryl esters at baseline, after 20 months and after 40 months, in random samples of post-MI patients, according to treatment group.

Geometric mean values (expressed as mass percentage) on a logarithmic scale are given, with error bars indicating standard errors. After 20 and 40 months, ALA supplementation in the margarine increased serum ALA by 64·7% and 66·9% as compared with placebo. *P<0·001 for group difference at that time point, obtained by t-test for independent samples.