Abstract
The plasma-free fatty acid response to intravenous glycerol infused at 250 and 500 mumol/min was determined in five normal volunteers in the postabsorptive state. There was a drop in free fatty acid concentration in all five subjects (one-way ANOVA, p less than 0.01) after the glycerol infusion with no change in insulin concentration compared to the post-absorptive state. These results suggest that intravenous glycerol infusions decrease free fatty acid concentrations in the post-absorptive state by an insulin-independent mechanism. When pharmacologic nonisotopic glycerol infusions are used to determined lipolytic rate, simultaneous measurement of free fatty acid concentrations should be interpreted with caution.
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