To access the data, click or select the words “Appendix 8.” Experimental data (as symbols, with standard error bars) and model fits (smooth curves) to the bioabsorption for copper (1.6 mg/day) derived from four tablets. The data points are the average responses of the 15 subjects adjusted for any baseline drift over the course of the study. The model fits are the result of minimizing the errors between the data points and curves at the sampled times. These data and the model fit for the response to four tablets are the best data for copper, but as indicated in the text have greater uncertainty than the results for the other four nutrients. Copper was supplemented at the lowest level of the five micronutrients.