Collards and other greens, such as kale, mustard greens and turnup greens all have a very pungent taste to them, in addition to having a very high content of acididy.
Seems the more that you cook them, the more this acididy breaks down and is reversed to make the greens taste better.
But a word of warning to those who love to eat greens and other green veggies; Even though all veggies, especially the green ones, & they are considered to have healthful benefits, there is one side effect.
They contain a high level of acid, and it is this acid that can raise your uric acid level, causing you to come down with a case of the gout!! I was diagnosed with it, though it is not a severe one. My mom had it and a friend of mine has it as well.
It is very painful, depending what joints in your body are affected with it. I get it in my left ankle (that is where my mom had it). It can get so painful that it'll make you cry!!
So please try not to indulge too much in this decicious tasting delicacy from the South. Moderation is key.