If you’ve ever felt your knees protest after a long walk or a damp, chilly day, you’ve probably thought about trying an epsom salt bath.
Grandmothers, athletes, and wellness enthusiasts have sworn by salt soaks for decades—but science hasn’t always been quick to back them up. That may be starting to change.
A study published in October 2025 took a closer look at this familiar home ritual, focusing on people living with knee osteoarthritis. Titled “Exploring the therapeutic potential of epsom salt bath on pain and intensity of knee osteoarthritis,” the research adds some long-awaited structure to a practice many already rely on.
Importantly, this wasn’t just anecdotal evidence. The researchers designed a randomized controlled trial, meaning a control group was involved and results were carefully measured.
While more study is still needed to confirm long-term effects, the findings offer promising insight into how something as simple as a soak may support mobility and daily comfort.
A Week Of Soaking: How The Study Worked
The study included 64 participants, all managing knee osteoarthritis—a condition where joint cartilage gradually wears down, leading to stiffness and pain. Participants were randomly split into two groups.
One group continued with standard care, while the other added a daily epsom salt bath for seven consecutive days. This setup helped researchers isolate whether the bath itself played a meaningful role.
To track changes, the team used established tools like the WOMAC score (which looks at pain, stiffness, and physical function), the KATZ index (which measures independence in daily activities), and the Numeric Pain Rating Scale (NPRS).
The goal wasn’t just comfort—it was whether soaking could make everyday movement feel easier.
What The Results Revealed
After just one week, the epsom salt group showed a statistically significant reduction in pain intensity compared to the control group. The reported P-value was less than 0.001, indicating the results were unlikely to be due to chance alone.
Beyond pain relief, participants also reported improvements in Activities of Daily Living (ADL). Simple actions—standing up, walking short distances, climbing stairs—felt more manageable.
According to the KATZ index scores, many felt more independent and confident in their movement.
While the study focused on outcomes rather than mechanisms, researchers point to magnesium’s known role in muscle function and inflammation regulation. When epsom salt dissolves in warm water, it breaks down into magnesium and sulfate—both of which may contribute to the soothing effect.
That said, researchers note that additional studies are needed to better understand absorption and long-term impact.
Why This Matters For Everyday Life
Living with joint discomfort often means saying no—to walks, hobbies, or time with loved ones. What makes this study encouraging is how approachable the intervention is. A warm epsom salt bath doesn’t require special equipment or a complicated routine.
Even for those without osteoarthritis, a magnesium-rich soak offers a moment to slow down, soothe tired muscles, and reset after a demanding day. Stress and modern diets often leave people magnesium-deficient, making soaking a gentle way to replenish while relaxing.
At Better Bath Better Body, we believe quality matters.
Our soaks use USP Grade epsom salt blended with 100% pure essential oils to elevate a simple bath into a restorative ritual. For instance, our Joints Soak Bath Salt combines frankincense, peppermint, and rosemary—some of the best essential oils for bath time.
Ultimately, a consistent soaking practice may be a small habit with meaningful benefits, whether you’re easing post-workout stiffness or supporting aging joints. Your body does so much for you; isn't it time you gave it something back?
Ready to reclaim your comfort and mobility? Shop our collection of epsom salt bath and foot soaks online today and start your own seven-day soaking journey!
