Is teeth whitening kit safe ?

I am really concerned about my yellow teeth. This color change occurred due to my coffee intake. Coffee is really a stress reliever. I feel energetic while having a coffee. So I used to drink it twice or thrice a day. Now I can't change this habit. Also, I am worried about this color change. My hubby is compelling for undergoing some cosmetic dental procedures. We planned to take an appointment at a clinic in Calgary for teeth whitening procedure( http://www.sierradental.ca/airdrie/services/cosmetic-services/zoom-teeth-whitening/ ). Last day, I met my friend. She asked me what happened to my teeth color. I told her about this. She told me that teeth whitening kits are available on the market and we can do this procedure in the home itself. But she never tried this, she only read about this. So I would like to know whether this teeth whitening kit is safe to do at home. If so, which is the best brand available? Which all things should I consider while doing this at home? Help me with your valuable suggestions. Tweet