Last weekend, I had a lovely (and probably quite tiring) time visiting my daughter. When I got home, I didn't want to cook, was cross and grumpy, didn't want to watch television with my husband, felt I was saying the wrong thing about everything, was stupid, had wasted my life and didn't want to get up in the morning - ever.
Then I realised I had not taken my vitD3 supplement for a week.
I started taking this when my bloodtests came back showing my levels were a bit low (not anywhere near deficient though) and after 6 weeks, I felt different in a surprisingly nice way. I now know that as well as for bone health you need it for joints (my painful aching went) and to use thyroxine properly in your cells. So you can end up with hypothyroid symptoms.
When I forgot to take them over Christmas, I started aching again, and felt low. Really, my levels should be topped up now, in theory, but that clearly has not happened.
I am sure it is probably a good idea to regularly check your diet and exercise, as it is hard to see when you are missing something sometimes. I think my downfall was going too low fat and reducing dairy to reduce my blood cholesterol levels. I am going somewhere sunny this summer