Figure 2

Average levels of serum arachidonoyl ethanolamide (AEA; A), 2-arachidonoyl glycerol (2AG; B), arachidonic acid (AA, C), oleoylethanolamide (OEA, D), and palmitoylethanolamide (PEA; E) levels across the lifespan, stratified by sex. Note: each data point is pooled serum from 50 participants. Error bars are standard error.