In my mid to late 20s and then early 30s I was HIT all the way. Then, priorities changed and I fell out of it completely. I’ve been struggling now in my 40s to get back into it. Starting and stopping. I read your article and decided to try lighter and more reps. I’m glad I did. It’s been a huge mental help knowing I don’t have to hit it heavy, initially, like I used to. I will probably start varying my workouts now as I slowly bring lifting back into my life. But have to say hi volume is a fantastic start! I’ve got all the old soreness back! Lol… oh how I miss that feeling
Although deaths from methadone are on the rise, methadone-associated deaths are not being caused primarily by methadone intended for methadone treatment programs, according to a panel of experts convened by the Substance Abuse and Mental Health Services Administration , which released a report titled "Methadone-Associated Mortality, Report of a National Assessment". The consensus report concludes that "although the data remains incomplete, National Assessment meeting participants concurred that methadone tablets or diskettes distributed through channels other than opioid treatment programs most likely are the central factors in methadone-associated mortality." 
Is there anything to worry about?
Yes there is. In fact, if you abuse the use of fat burners then there is certainly a lot to be worried about. You would be preparing yourself for side-effects which could be short-term, long-term, reversible or irreversible. Sounds horrifying? It is intended to be so because unless you use these things under proper guidance of an expert or medical practitioner, you are making a good case of what not to do. There have been cases in the past when people go to extremes in their desperation and suffer from side-effects. It is generally not the product that has to be blamed but the greed of the user for overnight success.