Changes in compositions of galactolipids, triacylglycerols, and tocopherols of lettuce varieties (Lactuca sativa L.) with type, age, and light source

•This is the first report of the composition of Galactolipids (GALs) in lettuce.•This is the first report of the composition of Triacylglycerols (TAGs) in lettuce.•The TAG composition changes dramatically from 3 to 8 weeks.•The TAG composition changes toward more unsaturated fatty acids.•The GAL composition remains rather constant across time and cultivars.