Fourhits,
We have had many discussions about vitamins, supplements, etc., on this board and I am confident it will never end. As far as you say you will be spending your energy on going after the manufacturer of whatever you have been taking for the last years, is this your anger about having cancer and trying to find "blame". We all go through this at times and most move on, realizing that you will never isolate exactly one reason you have cancer. In your case, you know you smoked for years and this could certainly indicate something of a risk, as would the alcohol. But even without these, many people get cancer. You could spend the rest of your life identifying "causes" but truth be known, it is much more complex than any one thing "causing" it. If we avoided everything that any study has been shown could contribute to cancer, we would live in a bubble and never interact with anything from outside air to other people.
Ed