Gels - do they always result in diminishing returns?

[Guest guest]

I read so many people on the boards who start on gels and are happy with them

for a period (say 2 years or so) then people claim they don't work the same and

then turn to injections.

1. Is this true - do gels only work for a certain period of time?

2. If so why would this be? (would the absorption rates decrease for some

reason?..)

3. Does the same effect happen with injections? (maybe to a lesser degree i.e.

they work better for longer)

Chris