Barker Wellness Co Kourtney x Barker Calm Magnesium Bath Flakes in Beauty: NA. Barker Wellness Co Kourtney x Barker Calm Magnesium Bath Flakes in Beauty: NA. Relax your senses and soothe your body with a blend of Magnesium harvested from the ancient Zechstein seabed, OptiMSM?, Eucalyptus, Blue Tansy Flower, Pine Needle, and Vitamin E. Rest assured that all our bath flakes use therapeutic-grade essential oils for our natural fragrances.. OptiMSM?: Methylsulfonylmethane is an organic sulfur-containing compound that can help maximize exercise benefits and the post-workout reset. Earthy forest notes will help calm your senses and it's natural anti-bacterial properties may leave your skin feeling softer and smoother. 17.6 oz. Dissolve at least one cup of Magnesium Flakes into a warm bath and soak for 30 minutes or more for optimal results.. It is recommended that the water be warm, but not too hot, as warm water helps the magnesium absorb into the skin.. BWEL-WU12. 00850035517901.