FIG. 1.

Plasma glycerol TTR during 6-h primed constant infusion of [²H₅]glycerol (n = 3) in arterialized blood (▪), forearm venous blood (•), and expected forearm venous enrichment (○). The expected deep venous glycerol enrichment was calculated as arterialized enrichment multiplied by arterialized glycerol concentration divided by deep venous glycerol concentration. The measured venous enrichment was consistently lower than the expected deep venous enrichment (P < 0.05), implying uptake of glycerol across the forearm. Values are means ± SE.