There have been a number of claims that garlic can do certain things such as help with inflammatory conditions such as gout along with curing colds, though sometimes these claims are unsubstantiated. Those who want to try garlic as a means of curing a cold will need to cut their garlic into squares, adding several quarts of water.
Make sure that you boil this mixture on low for about an hour, strain it, and sip slowly to avoid burning your tongue. Because of the high concentration of Allicin in garlic as well as the compound organosulphur, it is possible that garlic can help with the common cold, though it might not be an end-all cure.