Age 30 and the bonding has discolored. Is dental bonding the best option?

Hi:Most likely the bonding can be replaced.  For more accurate advice please post photo of the smile.  Depending on the size best long term solution might be porcelain veneer.Best,Dr. Maddahi

Without photos it is hard to be accurate but in general terms bonding can be replaced and upgraded if there are not significant changes or breakdown to the existing tooth structures. Good Luck!

Yes, dental bonding is the best option. The dental bonding is the procedure of a tooth-colored resin material that uses adhesives and high intensity curing light. It improves the appearance of a chipped or broken teeth. This procedure take a little to no preparation. Only your dentist will examine your health condition and make use of a dental bonding to fill a decayed tooth. The dentist also matches the shade of your already fixed teeth to choose a composite resin that closely matches the tooth color.

Dental bonding stains. The amount of staining can depend on how well the bonding was done, but mostly it depends on your diet and wether you smoke. Drinks like coffee and red wine are especially bad for bonding.  
Keep in mind dental bonding looks it’s best the day you get it and slowly stains and wears after that point. Typically they last 5-10 years. Your bonding has lasted 22 years! 
Your options now are 1) replace bonding with new bonding or 2) replace bonding with porcelain veneers. That decision needs to be made by you and your dentist after evaluating your situation.