Vitamin D deficiency
Vitamin D deficiency is very common and lowers Immune defences (especially to Covid!) and causes muscle aches/fatigue.
Black & Asian people are more likely to have VitD deficiency. We don't measure it.
Patients are to buy their own vitamin D over the counter at the pharmacy or some bigger supermarkets, they shouldn't be too expensive. We DO NOT prescribe it.
Discuss doses with pharmacist.
For adults, a winter boost of 1000iu (international units) of Vitamin D daily for 2months will make sure you're topped up. (or 2,000iu for 1month)
Patients with slow kidneys or kidney stones should discuss with GP first.