Garlic and Onions, some say it is like the "anti-biotic" of Chinese Medicine. How does Garlic and Onions affect your Qi ?

I have found that it creates turbulence in the lower energy centers of the body, such as stomach, abdominal and genitalia area. It manifests itself in coarser thoughts, one is readily adsorbed in anger, irritation and frustration and sexual thoughts.

So how does Garlic and Onions affect your Qi training ? Do you use it to increase the effects of Qi ? or do you abstain from it to achieve subtler Qi movement. Do you use it to increase certain 'drives' ?