I take vitamin D suppliments every day. I think my iron is okay. I was diagnosed with sleep apnea many years ago. I had surgery for it that did not work long-term. I can’t tolerate a C-PAP. My wife sells essential oils and has one she has me apply to my nose before going to bed. It keeps me from snoring. However, I have been having a lot of problems staying asleep. Today I woke up at 2 AM and couldn’t fall back to sleep. Yesterday it was 1 AM. This has been happening sporadically for months. I have no idea why I’m waking. Very annoying.