People don’t realise how common this is, especially in winter and in countries that don’t get a lot of sunlight. If you live in an apartment and work full time, then it’s hard to get that sunlight.
Once you scroll through this article, there is one on magnesium deficiency please read that too. It is more often than not that we are deficient in magnesium. One of the first things you will notice is aching leg muscles and fatigue. Also magnesium taken orally is a waste of time and money. It is best absorbed transdermal in a cream form. I use this myself all the time. For muscle aches make sure that you drink enough water too because when muscles are not getting enough water they tighten up and can cause muscle aches and fatigue.
This is the link for an Australian website that has a good magnesium cream, the spray leaves an icky texture on your skin, so use the cream. There is a great American brand called Ancient Minerals, I used to buy that but it’s very difficult to get recently, so I have been buying the Amazing Minerals Sleep lotion, which has lavender and chamomile essential oils. I guarantee that you will sleep well with that.