Magnesium, vital for various body functions, can be applied topically for better absorption. Experts suggest using magnesium oil on the belly button to promote relaxation, improve sleep, reduce cramps, and ease digestive discomfort. This method may bypass digestive issues related to oral supplements. Magnesium, vital for various body functions, can be applied topically for better absorption. Experts suggest using magnesium oil on the belly button to promote relaxation, improve sleep, reduce cramps, and ease digestive discomfort. This method may bypass digestive issues related to oral supplements. Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle