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. 2022 Mar 2;13:838782. doi: 10.3389/fphar.2022.838782

FIGURE 2.

FIGURE 2

Reported concentration ranges of selected SPMs in human plasma. Based on the comprehensive review from Calder (Calder, 2020) the number of studies and the detected concentration range are summarized for RvD1, RvD2, RvD3 and RvE2 in plasma from human subjects. In the majority of the studies the concentration is low (<50 pg/ml) which is close to the detection limit of several methods or below (Table 2).