What it's normally used for
Garlic supplements are great at improving the immune system. One study showed that a garlic supplement taken daily lowered the number of colds by 63%. The average length of the cold was lowered by 70%, from 5 days for those with a placebo, to under two days with the garlic supplement.
Researchers have found that allicin, which is found in garlic, and gives it its flavor, might be able to fight cancer. It appears that the chemical reaction that creates allicin, which takes place when the garlic is eaten or smashed, might kill tumor cells.
Garlic might lower elevated serum levels of homocysteine, according to preliminary studies. Lower total cholesterol helps keep the blood thin, lowering the risk of blood clots and stroke, lower blood pressure, lower LDL ("bad") cholesterol.
Garlic can have a powerful antioxidant effect in the body, where it protects against damaging free radicals.
Garlic has anti-fungal properties that are great for reducing fungal infections, like yeast infections.
What it does for Lucid Dreaming
Garlic helps you sleep heavier and can give you vivid dreams.
My own results
I take Garlic before bed and I remember more of the dream, where it seems like it's a longer dream.