The abs are a thin sheet of muscle (check the diagram at en.wikipedia.org/wiki/Rectus_abdominis_mus
) so even when contracted, they aren't going to bulge as noticeably as say, the biceps, which are more like a thick tube.
Visible abs are normal the result of a very low body fat percentage (and therefore only a thin layer of fat cover over the muscles), rather than massively developed abdominal muscles themselves.
So keep focussing on reducing your overall body fat.
I don't know specifically about 'green coffee', but most so-called diet pills are scams and have very little effect. There are a few that are genuinely effective, but most of those have been banned by the FDA as having dangerous side-effects.
The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man.
| current weight: 178.0