SNAP Vitamin and Mineral Improvement Act of 2019 This bill allows Supplemental Nutrition Assistance Program (SNAP, formerly known as the food stamp program) benefits to be used to purchase multivitamin-mineral dietary supplements for home consumption. Specifically, the supplements (1) must provide at least half of the vitamins and minerals for which the National Academy of Medicine establishes dietary reference intakes at 50% or more of the daily value for the intended life stage per daily serving, as determined by the Food and Drug Administration; and (2) may not exceed the tolerable upper intake levels for those nutrients for which an established tolerable upper intake level is determined by the National Academy of Medicine. The bill amends the definition of "staple food" to exclude multivitamin-mineral dietary supplements.