I would suggest to trymagnesium threonate for potential benefits to neural and brain health. May be magnesium chloride may not cross the blood brain barrier effectively but it can support in cognitive function.
Electrolytes serve a number of purposes in our bodies and one of those is helping provide healthy muscle and nerve function. The main electrolytes include sodium, calcium, potassium, phosphate, magnesium, chloride and bicarbonate.
Proper hydration helps insure healthy electrolyte balance. You should talk to you doctor and get tested prior to supplementing with electrolytes as not having the right right ones can actually create an imbalance.
In addition, supplementing with the incorrect form of an electrolyte can be a waste of time/money. For instance, magnesium citrate is equivalent to taking a laxative, without changing your magnesium levels.
I hope someone writes in that knows more about electrolytes, but when I needed some because of being on a clear liquid diet, I was told to use Pedialyte, unflavored, which contains potassium citrate and sodium citrate.
I assume you are doing this on the advice of your doctor? What does he or she say about what you should be taking?