Dont forget that your system is effected by everything that goes in it and so that also includes things you put on your skin, but, it also goes for things that you smell!
If you are lighting strong scented candles or even if you are not lighting them and they are just giving off a smell in your home it may be best to put them outside in your storage shed for a while. Also, plug in air fresheners or those little glas bottles with scent that you put the little sticks in–not a good idea. All of these things may influence you in a very negative way.
Dr.M