I'd like to add that correcting deficiencies implies seeing a physician to get your dosage right. This is necessary both for Vitamin D and Melatonin.
If you're not a sedentary geriatric with MCI this study is probably not for you.
Sadly, many people in northern areas who are otherwise healthy are vitamin D deficient. It can be a side effect of trying to protect from skin cancer.
Sadly, many people in northern areas who are otherwise healthy are vitamin D deficient. It can be a side effect of trying to protect from skin cancer.