I see a lot of dense experimental designs on this page - is any of this abstracted into a simple tool/methodology for use for self-testing (I've noticed some bi

I see a lot of dense experimental designs on this page - is any of this abstracted into a simple tool/methodology for use for self-testing (I've noticed some big differences when taking Vitamin D (I'm usually deficient), B-Complexes, etc but don't have a great way to isolate/correlate especially against other factors like sleep or travel...