"Dietary surveys consistently show that the majority of Americans consume less than the recommended amount of magnesium from food, which varies by gender and age (1). This shortfall is likely due to a diet high in processed foods, as well as widespread soil mineral depletion. (...) With various types of magnesium supplements to choose from, it can be hard to know what type is best."
https://www.vitalnutrients.co/blogs/education/comparing-the-different-types-of-magnesium-supplements