Abstract: A system for individual need-based determinations relative to the use of a substance is presented in various embodiments. As applied to supplements the system may be configured to present a test modality (6) which may be attached to a distribution container (1) within which supplements (2) or the like may be contained. The test modality (6) may be a user practical test modality that may be provided to a user with an information display (11) that may include an internal display (12) to educate the user on a particular test modality (6). Provisions for the options of a test result recordation enablement element (10) are provided in both manual and internet forms. The test modality (6) may be test strips compactly assembled and provided attached to the distribution container (1).