I have included a vitamin D spray below and it really is the minimum dose you should be taking, some people will need to take 3 times this amount.  I am a firm believer in test don’t guess when it comes to vitamin D.  This is because some people have a genetic tendency to be slow metabolisers of vitamin D from the sun and if you need to mega dose vitamin D to achieve optimal levels, you need to do this before you get pregnant.  Vitamin D is so, so important for fertility health and also for pregnancy for reducing preterm birth risk.  A lot of GPs have stopped testing for vitamin D so for this reason I am linking an at home vitamin D test below.  It’s more important to get your levels tested during the winter than the summer for obvious reasons but I do recommend 10-15 minutes of bare-skinned sun exposure before you put any sun factor on to optimise your vitamin D production.  September is a good month to test as it will tell you what your supplies are like after the summer.  These supplies have to last you until the following April so ideally they should be well over 100nmol/L!  If you have a tendency to get blue or very tired during the darker evenings you might have the gene where you don’t make enough vitamin D and I would definitely recommend testing.   I am happy to give a dosage recommendation once your results come back.