Originally Posted by
Notso_fastLane
This is true.
Sometimes the plastic outer shell won't show much, if any damage, and the underlying EPS may be damaged. One could take a chance that there is either 1) enough energy absorption left or 2) you won't hit that same area again, but if a helmet is dropped or takes any significant impact, then I would recommend replacement.
Hahaha... you have no idea how many times I drop my helmet. Certainly not going to buy a new one each time.
Someone else said it previously. The helmet just protects your noggin if you fall off your bike. It's not magical space technology. Just some foam between head and pavement.