Hi, my mum has an underactive thyroid and I got her to have some blood tests done and it came back that she has slightly low vitamin D at 40 (<50 is insufficient).
Now previously I had a score of 47 and I was given 20,000IU tablets to take once a week for 3 months and this successfully got me to 97. This was prescribed to me by an endocrinologist but my mum doesn't have an endocrinologist and the general rules by GP's is that they won't treat an insufficiency, they just advise you to eat more fish and mushrooms which is ridiculous as I needed to take very high doses of vitamin D to get mine up so clearly that advice isn't very effective.
My question is, is it appropriate to give my mum the same treatment I had? I already have the pills of 20,000IU in but I'm just wondering if someone with a thyroid disorders should take such high doses? Or as she's older (late 50's) and is on the verge of being prediabetic, will it effect her differently?