Magnesium in humans is great for sore muscles, bone development, and nourishment for the whole body. Magnesium is necessary so minerals can be transported around the body. It also regulates blood pressure and keeps blood sugar levels normal. Without it, bones will weaken and human growth will be stunted.
Magnesium is required for a plant to survive. Without it, chlorophyll cannot absorb the sun energy that is needed for photosynthesis. Chlorophyll is the pigment in the leaves of the plant that absorb light, which is what makes them green. It uses that energy