Garlic's Attack on Plaque
Garlic contains several powerful antioxidants -- compounds that prevent oxidation, a harmful process in the body. One of them is selenium, a mineral that is a component of glutathione peroxidase, a powerful antioxidant that the body makes to defend itself. Glutathione peroxidase works with vitamin E to form a superantioxidant defense system.
Other antioxidants in garlic include vitamin C, which helps reduce the damage that LDL cholesterol can cause, and quercetin, a phytochemical. (Phytochemicals are chemical substances found in plants that may have health benefits for people.)
Garlic also has trace amounts of the mineral manganese, which is an important component of an antioxidant enzyme called superoxide dismutase.
In addition to its antioxidant powers, which keep the blood clean,
garlic can also slightly reduce blood pressure.
Similarly, when your body breaks down glucose for energy, free radicals are produced. These free radicals start oxidizing -- and damaging -- cellular tissue. It's as if your bloodstream and blood vessels are "rusting out."
Antioxidants destroy free radicals, including those that are products of environmental factors, such as ultraviolet rays, air pollutants, cigarette smoke, rancid oils, and pesticides. The body keeps a steady supply of antioxidants ready to neutralize free radicals. Unfortunately, sometimes the number of free radicals can overwhelm the body's antioxidant stock, especially if we're not getting enough of the antioxidant nutrients.
When free radicals harm the cells that line your arteries, your body tries to mend the damage by producing a sticky spackle-like substance. However, this substance attracts cholesterol and debris that build up within the arteries, causing progressive plaque formation. The more plaque in your arteries, the more your health is in danger.
In addition, the cholesterol circulating through your arteries can be oxidized by free radicals. When LDL is oxidized, it damages the lining of the arteries, which significantly contributes to the buildup of plaque and the narrowing and hardening of the arteries.
Arteries, then, benefit greatly from the protection antioxidants provide. And garlic's ability to stop the oxidation of cholesterol may be one of the many ways it protects heart health.
Your body determines how it uses calcium, and you can't do much about it. If you avoid calcium-rich foods, your body will make up for the deficit by drawing calcium out of its "savings account" -- your bones.
This can leave you with weakened bones that are more susceptible to breakage and eventually osteoporosis, a disease in which bones become very thin and break easily.
Consume about 1,000 milligrams of calcium each day (an eight-ounce glass of fat-free milk has 300 milligrams of calcium) to preserve your bone bank of calcium. Prevent calcium-fueled plaque buildup in your blood vessels not by avoiding calcium but by eating less saturated and trans fat and eating more antioxidant-rich foods, such as fruits, vegetables, and garlic.
The placebo group had a significantly greater increase in their calcium score (22.2 percent) than the group that received the aged garlic extract (calcium score of 7.5 percent). The results of this small pilot study suggest that aged garlic extract may inhibit the rate of coronary artery calcification.
If further larger-scale studies confirm these results, garlic may prove to be a useful preventative tool for patients at high risk of future cardiovascular problems.
Want more information about garlic? Try:
- Vegetable Recipes: Find delicious recipes that feature garlic.
- Nutrition: Find out how garlic fits in with your overall nutrition plans.
- Vegetable Gardens: Grow a full harvest of great vegetables this year.
- Gardening: We answer your questions about all things that come from the garden.