blood panel traits in the UK Bio bank (UKBB) when using European-derived summary statistics (Supplementary Note). Consistent with previous studies, we find that relative to European prediction accuracy, genetic prediction accuracy was far lower in other populations: 1.6-fold lower in Hispanic/Latino Americans, 1.7-fold lower in South Asians, 2.5-fold lower in East Asians, and 4.9-fold lower in Africans on average (Figure 3).