Hydrotherapy, such as heat exposure, has low risk for most individuals, with potential benefits for health, provided care is taken to avoid burns and individuals with cardiac arrhythmias or tachycardia are cautious.

“But the question is, is in the meantime, while we're waiting for them to work, if there's something that has biological plausibility, and it has very little risk, you know, what's the risk of hydrotherapy? Well, number one, burning yourself, you have to be very careful that you don't burn yourself. And number two, if you've got a predilection for cardiac arrhythmias, or tachycardia, or atrial fibrillation, it's probably not a wise thing to be exposing yourself to temperature extremes. So barring that, I think this has got pretty low risk and may be beneficial.”