Well, I have just finished my 10-day box and have not yet received my box that I ordered from Amazon so I went XLS hunting in my lunchtime. After 2 Boots and 1 Superdrug, I have to accept that XLS are sold out near me! Very annoying!!!
On the positive side, constipation has now gone and I'm back to regular so it would appear that it takes the body a while to learn to deal with XLS. I haven't eaten yet today so it has nothing to do with running out of tablets.