FROM:
Am J Clin Nutr 1996 (Dec); 64 (6): 866–870
Steiner M, Khan AH, Holbert D, Lin RI
Memorial Hospital of Rhode Island,
Pawtucket, USA.
Steiner@Brody.med.ecu.edu
A double-blind crossover study comparing the effect of aged
garlic extract with a placebo on blood lipids was performed in a
group of 41 moderately hypercholesterolemic men {cholesterol
concentrations 5.7-7.5 mmol/L (220-290 mg/dL)}. After a 4-wk
baseline period, during which the subjects were advised to adhere
to a National Cholesterol Education Program Step I diet, they
were started on 7.2 g aged garlic extract per day or an
equivalent amount of placebo as a dietary supplement for a period
of 6 mo., then switched to the other supplement for an additional
4 mo. Blood lipids, blood counts, thyroid and liver function
measures, body weight, and blood pressure were followed over the
entire study period. The major findings were a maximal reduction
in total serum cholesterol of 6.1% or 7.0 % in comparison with
the average concentration during the placebo administration or
baseline evaluation period, respectively. Low-density-lipoprotein
cholesterol was also decreased by aged garlic extract, 4% when
compared with average baseline values and 4.6% in comparison with
placebo period concentrations. In addition, there was a 5.5%
decrease in systolic blood pressure and a modest reduction of
diastolic blood pressure in response to aged garlic extract. We
conclude that dietary supplementation with aged garlic extract
has beneficial effects on the lipid profile and blood pressure of
moderately hypercholesterolemic subjects.