All Jokes aside, first of all the body and dna system is much more complex than most who have an opinion can even comprehend. Secondly, how could an entire group of people who have grown up in a culture that eats high fructose corn syrup, consumes an overabundance of sugar, inhales chemtrails, drank tap water, inhales toxic cigarette smoke, has had an alcoholic beverage, believe that they will "ascend". That's like saying if you have eaten an oatmeal cookie, you will not ascend. More like, If you have lived any other lifestyle than that of a yogi, you will not ascend. I also believe that one must learn to think for themselves and cast there own judgemental eye over the fields of their own activities. It is not for me to decide what will allow you or anyone else to ascend. The whole spiritual journey IMO is about learning how to master your own faculties and align yourself with the proper energy. How you do that is up to you. I personally smoke, but I do not consider the amount to be damaging to my system. I can see how if I did it more often, that I may lose a focus, but that is me, and how I view my own life. I also believe that there is a line to be drawn between use and abuse, and I think that line needs to be drawn by the individual involved. I believe it would be more damaging to lie to yourself about what you do and how you view it than what it is you actually do. who knows what type of mission each individual person is own in this reality. We are surrounded by illusions for so long until that light reveals it's purpose. A person could be lying dead, face down in a puddle of vomit with blood running out of there nose and a needle in their arm with a crowd of bystanders looking on thinking, what a shame. What a waste of life, Look what those things do to you. Who really knows, maybe they were done with their mission and that's how they left. I know that this is an extreme example, but it exemplifies the mystery of the purpose of the individual. Who is to decide, who is to say, what the criteria for ascension really are.
If experimenting with harmful substances was damaging to me and my brain cell count, I do not think that I would have a razor sharp mind and be experiencing all of these ascension related themes in my life. That is me and my journey, that Is what I believe, that is how I have lived. I really don't think that I am a good case study however as I seem to defy the laws of what and how on a daily basis.
I'm pretty sure that if my dna was badly damaged that I could fix it by attaching gummy bears to the missing portions and still ascend.

However, Being respectful of the power of nature is always a good policy.
So is thinking for yourself.