Yes and no.

In times where it takes seconds to throw ur post into a translator at 0 costs and copy paste ur message below in english there is hardly any reason for not doing it.

I use english too so people understand me or I go to the german communities.

But now that the message has been translated in the comments it really shouln’t be any problem at all :)

If the greeks would have just asked more nicely the brits would have returned them ages ago /s

Except for the Vitamines E, D, K and A, Vitamines are takes up in a controlled way so you cant really overdose them. Overdosing VitA can cause blindness So thats no joke either.

Im no expert on supplements but I know that the new chemotherapies for cancer that include an upregulation od the immune system have autoimmune diseases as a side effect. But I guess you would have to apply that harsh measures to unleash autoimmune diseases.