There has been increasing evidence over the last 20 years that the best way to prevent infections is to have a strong immune system.
If you have a strong immune system it is harder for any infection to take hold and easier for your body to fight it off.
During the COVID-19 pandemic there has been increasing interest in the role of vitamin D because it has a role in reducing inflammation. What seems to cause the severe COVID-19 cases is an out of control inflammatory response.
The guidelines suggest:
Adults (including women who are pregnant or breastfeeding), young people and children over 4 years should consider taking a daily supplement containing 10 micrograms (400 units; also called international units [IU]) of vitamin D between October and early March because people do not make enough vitamin D from sunlight in these months.
Adults, young people and children over 4 years should consider taking a daily supplement containing 10 micrograms (400 units) of vitamin D throughout the year:
if they have little or no sunshine exposure including because they:
are not often outdoors, for example, if they are frail, housebound or living in a care home
usually wear clothes that cover up most of their skin when outdoors
are spending most of their time indoors because of the COVID‑19 pandemic
if they have dark skin, for example, if they are of African, African-Caribbean or south Asian family origin, because they may not make enough vitamin D from sunlight.
High dose vitamin D can interact from some prescription drugs. If you are taking any prescription drugs check HERE or with your pharmacist.