Abstract
The response of the sebaceous gland to total caloric deprivation was studied in 18 obese patients undergoing fasts for periods of four to eight weeks. Sebum production was measured in 11 of the patients and was found to decrease in each individual, with an average reduction of 40%. Diminished secretion usually occurred by the fourth week but was sometimes seen as early as one or two weeks. The composition of the sebum, analyzed in 14 patients, was also altered, and this could be detected as early as five days after the onset of fast. The qualitative changes in surface lipid consisted of a reduction in the amount of triglyceride fatty acids, wax esters, cholesterol and cholesterol esters but with no significant alteration in the amount of squalene.
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