This is some good stuff. There are countless reasons why people use magnesium spray. If you are searching this page then you know your reason! I personally have replaced my melatonin with this spray. There is no harm in trying something new. The best part is it is all natural. There truly is nothing to lose! This spray comes in two sizes. Sold 4 ounce bottles. Make sure to give it a good shake. We put Himalayan sea salt in ours!