in lab test, they use the real concentrate and yes, that is going to kill anything on pure contact, but by the time you put 1 drop in the human body, in my opinion, it is as safe as any food can be. and i know for a fact, the amish healer uses 1 pure drop direct in the mouth of little babies dieing of whooping cough per hour and claims he has cured cases in 7 drops / 7 hours and that nothing else on earth can do this.......while that same drop will make any adult human squirmish and run for water.
i have seen people eat habaneros raw out of the garden brught orange in color and have zero hot effect, simply because they grew up eating them and have zero fear of them, thus no acids created in the human body to repell the pepper and thus no "hot" feelings..
some authors swear that if you loose your fear of fire, that you can walk through fire unharmed and swear our own fear causes us to burn alive till we die...which seems hard to accept as truth, but stranger things have happened and much on earth a mystery.