Hello everyone.
This is really topical at the moment, especially in light of our three days of summer!
Vitamin D is a confusing little blighter as it is actually a steroid hormone and vitally important for good bone and connective tissue development as children but also to prevent osteoporosis in later years. Current research also suggests levels below 20mmols may increase certain cancers. Even with a perfect diet it is incredibly difficult to obtain more than 10% or your requirement, daily broad area exposure to sunshine, ideally in the morning, without sunscreen may maintain low / normal levels in folk without underlying health issues.
I use mineral sunscreen all year round because of an autoimmune condition so manafactured very little, after 3 weeks in Mexico mine reached the dizzy heights of 17, deemed critically low.
Depending on how low levels are determines the need for active or therapeutic treatment. Active is a very high dose weekly for 7 weeks then a fairly high dose usually for life. Therapeutic management can be obtained by using high quality over the counter supplements ( prescription doses are not bound with calcium for those who cannot take this).
The main thing is to remember that this is a vital hormone and even slightly low levels can lead to unpleasent symptoms, research is on going and some members of the medical profession are more enlightened than others.
If you are concerned discuss with your GP 're the need for a blood test to check, you can then make an informed decision on how best to manage your levels moving forwards.