From the American Amazon shop:

Look at the dose. 50,000 I.E.
Indeed, in the US, Netherlands, the UK, Vitamine D is freely sold at doses of up to 50,000 I.E. per pill. No prescription needed. To my knowledge, problems and scandals have not been reported with using such doses. As I said, however, I think taking higher doses than 20,000 per day only creates expensive urine, the body apparently is made tometabolize 20,000 per day - but not more. Beyond that level, a negative feedback loop gets activated that reduces Vitamine D production in the skin dramatically - and kills equal ammounts of Vitmaine D in existing fatcell reserves. As I see it you have no benefits from taking more than 20,000 per day (if you have no health conditions needing severla hundred thosuand units to actually get at least a small benefit from taking Vit-D.
This is a Swiss doctor specialising in Vitamine D high dose therapy in clinical contexts, I know a bit about him in a different context as well, I trust him. Its in German, sorry. Maybe subtitles and auto-translation does the job, I have not checked it.
The highest dose i can find at German amazon, is 20,000. I have a remaining stock of these, from my flooding phase last year. Will consume them over the next winter.