Epsom salts have been well documented for use as a natural remedy for a number of ailments. The 'salt' is in fact not a salt, but a naturally occurring mineral compound of magnesium and sulphate, which are both readily absorbed by the skin. Together they can reduce inflammation, flush toxins, and help ease aching muscles, strains, congestion and headaches.
All that from just bathing in it? Prior to trying it myself, I was a bit skeptical. Therapie's near £40 tub seemed a bit extravagant, too.
For a more budget-friendly option: Westlab Pure Epsom Salt are less than a quarter of the price, in 500g, 1kg, 2kg, 5kg and even 25kg bags.
A handful of salts added to a usual bubble bath equates to a heavenly soak. Whether it's the heat or salts or scent of the bubbles - probably a mix of all three - I can guarantee to feel relaxed and have a good night's sleep afterwards.
Consider that another bandwagon jumped.