I've recently found out that my vitamin D levels are so low that it's not possible to get a reading on them (apparently below 30 doesn't register?) However, when I've collected my prescription they seem a much lower dosage on prescription than what I bought last week in Sainsbury's, and on googling it seems people are taking doses of around 5000iu for similar deficiencies. Do I need to double up? (Picture shows prescription on left and over the counter on the right).
I'm also hoping that you're going to tell me that getting your vit D levels back up transformed your life, helped you drop 2 stone and stopped you feeling 90 years old? 