Changes in the U.S. food supply and food choices make examination of temporal changes in micronutrient intake and their effect on meeting nutrient recommendations necessary. Examine 15-year trends of the contribution of foods and beverages (FB) and dietary supplements (DS) to meeting nutrient recommendations among U.S. adults 19+ y, and compare usual mean intake distributions of FB alone and FB+DS to Dietary Reference Intakes [percent below the Estimated Average Requirement (%AI)]. This cross-sectional study used food, beverage and DS intake data from NHANES 2003-2018 (n = 39,925) to determine usual mean intakes for 21 micronutrients. Changes in intakes from FB and from FB+DS, by sex, were compared in a time-trend analysis of 2-y cycles. Changes in mean intake as %AI were determined. Over the time studied, U.S. adults underconsumed vitamins A, C, D, E, K; calcium; potassium; magnesium; and choline, even when DS intake was included. Sodium was overconsumed. In males, there were significant increases in percentage <EAR for thiamin, riboflavin, vitamin C, iron, copper and zinc for intakes from FB. When FB+DS were considered, there were significant increases in percentage <EAR for thiamin, riboflavin, vitamin B-12, vitamin C, copper and zinc and significant decreases in percentage <EAR for vitamins D and E. In females, there were significant increases in percentage <EAR for vitamin C and zinc for intakes from FB and from FB+DS; significant decreases in percentage <EAR for vitamins D and E, and magnesium for intakes from FB; and a significant decrease in percentage <EAR for vitamins A and E from FB+DS. Although some progress has been made, nutrient intake and percentage of the population meeting nutritional recommendations among U.S. adults has changed little over the 15 years studied.