A good Rule of Thumb is everything in moderation. It’s a good idea to work your way up to longer sweating sessions, if you’re not used to sitting and sweating in a sauna, hot tub, bath, or steam room. As long as you drink plenty of water and replace any minerals you may have lost during sweating, longer sessions should be fine. Listen to your body’s feedback and use common sense. Although sweating in a hot bath or a dry sauna is the form of sweating most recommended on the plan. It is much more important to sweat any way you can – hot bath, steam room, Jacuzzi, etc. -than to worry about whether or not the water you are sweating in is toxic.