My own observation is not scientific. Still - I saw a big impact after taking Vitamin D. Note that I do not take any supplement or medicine, almost never, even

My own observation is not scientific. Still - I saw a big impact after taking Vitamin D. Note that I do not take any supplement or medicine, almost never, even when I am really sick. I had various unspecific problems (random infections, inflammations etc.) - all of these disappeared after deiciding to take Vitamin D daily half a year ago. I do not have an explanation other than it works.