Stress can cause cortasol levels to rise and makes fat belly weight gain. Some new light bulbs have mercury in tbem, also most infrated spas are not healthy for us do to high emf (dirty electricity) wich is why research on the kind of spa you have will be healpful. Also cedar wood is not good for saunas because. A Turpentine type of chemical effect. Look into your sauna for mateials are they good and natural?