The article mentions the reduction, not beginlevels of the substances. It turns out that the reduction during the test period is about 30% (for at least one of

The article mentions the reduction, not beginlevels of the substances. It turns out that the reduction during the test period is about 30% (for at least one of the substance categories). A meaningful reduction for sure, but it should be interesting to test them after a few years of blood donation. On page 6/7 of the JAMA pdf you find the relevant graph. https://jamanetwork.com/journals/jamanetworkopen/articlepdf/2790905/gasiorowski_2022_oi_220196_1648733774.14966.pdf https://jamanetwork.com/journals/jamanetworkopen/articlepdf/...