Hi
@LonelyFatGuy . My reply was not aimed at you specifically. More a general observation so people can make informed choices on whether or not they should take vitamin supplements.
To answer your question, though, I was prescribed
Evacal D3 1500 mg/400 iu chewable tablets (1 x twice a day) by GP following routine blood tests and diabetes review in 2015. My VitD levels were deemed to be way below optimum. I started to feel ill the following year with abdominal discomfort, fatigue, bone pain. This was attributed to other health conditions such as arthritis and allergies. No change made to prescription, as no connection was made.
Since the covid pandemic blood tests and GP appointments have been almost nonexistent for a while. In July last year I was ill with severe abdominal pain. Found to have raised vit D and extremely high calcium levels and parathyroid levels in blood. So the prescribed Vit D was changed to one without calcium, Colecalciferol (Vitamin D3) 400 iu, once a day. In January there was no improvement, so endocrinologist stopped all Vit D supplements after blood tests showed hypervitaminosis D and hyperparathyroidism.