Is it possible to whiten composites on my teeth? i want my teeth whiter but i also have composite fillings. i was concerned they can't whiten.

Concern is correct: Most of the public has been confused and misled by the media and advertising. There is a major difference between surface whitening and internal tooth whitening. Your composites can be 'whitened' by removing surface stain with abrasive toothpastes and a cleaning at your dentist. True whitening methods will not whiten them. Only natural tooth enamel will whiten.

Nothing: Composites do not whiten. Are they in your front teeth? They would need to be replaced if visible. Composites in the back teeth may not be obvious and not need replacing. Some composites do have a mild cameleon effect where they tend to pick up the shade of the teeth so the shade match is better. Talk to your dentist.

Polish, not whiten: Polishing old composite fillings makes them lose surface stains to some extent, so they appear lighter. However, you are right, they do not whiten from whitening materials the way natural teeth whiten. Your best bet is to first whiten your natural teeth as best as possible, then get the composites replaced to the new lighter shade so everything comes out matching and looks great.

Resurface not whiten: Stain absorbed into composite plastic white fillings will not bleach out. (surface stains on the other-hand may whiten) if polishing or whitening doesn't work and the filling is intact, and there is no seepage and it only a few years old, consider conservatively resurfacing the deep stained composite with fresh composite.