I've never heard that anywhere before. The instructions that came with the test don't say anything about that the time of day that the sample must be collected to be accurate.

My understanding is that the first test of the day is most likely to be dirty as metabolites to be voided build up through the night as you sleep.

So, why do I need to do this? Are you saying to do it tomorrow morning? Morning of the test? When and why? Thanks for the reply, and any others would be much appreciated. Peace