Report questions garlic's long-term benefits

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Dietary use of garlic may lower some types of cholesterol in the
short term, but it does not appear to offer long- term protection
against cardiovascular...

Dietary use of garlic may lower some types of cholesterol in the short term, but it does not appear to offer long- term protection against cardiovascular disease, says a new evidence report released today by the Agency for Healthcare Research and Quality (AHRQ). Garlic may help to reduce low-density lipids (LDL), or "bad" cholesterol and triglycerides. However, the evidence is only for short-term (1 to 3 months) effects. The long-term benefits have not been determined. The levels of high-density lipids (HDL), or "good" cholesterol, were unaffected. After 6 months, no further reductions in either triglycerides or LDL were apparent. The report calls for additional research to examine the short-term benefits versus the long-term benefits of garlic consumption. The authors found no evidence that garlic has a beneficial impact on blood pressure or diabetes. The evidence was inconclusive about garlic's role in protecting against cancer. Dietary garlic may possibly be associated with decreased likelihood of some types of cancer, but the number of available studies was not sufficient to draw conclusions. Another limitation of the current evidence is that research does not sufficiently address the variations in garlic preparations, such as raw, cooked or supplement form. Types of garlic and garlic preparations vary widely. As a supplement, it is available dehydrated in tablets and as extracts, oils, and in combination with other supplements. The report, which was based on a systematic review and analysis of scientific evidence related to clinical studies of garlic in humans, was conducted for AHRQ by the San Antonio Evidence-based Practice Center at The University of Texas Health Science Center at San Antonio and the Veterans Evidence-based Research, Dissemination, and Implementation Center (VERDICT), a Veterans Affairs Health Services Research and Development Center of Excellence

Related topics: Science

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