short answer, no coz US FDA / ministry will lose head if say yes.

Another view, if everyday you drop 1 drop of ink into a pond, eventually what will happen to the pond ?

Also consider who wants to participate in a reseach for so many years long, risk their own health so that there is real evidence.

Conclusion, orange cost 70cents to 1.20

You got the idea.
That's why I conclude with orange.
The choice is yours.

You ask on internet, they not related to you, can say anything.
Years down the road only IF there are consequences, then it is your health.
That's why I share safest solution, if you want Vitamin C then you can get it from oranges.

Keep in mind Vitamin C can overdose of sorts.
Sometimes when body sick, can use high dose of Vit C, but if user consistently taking high dose then may not be able to use Vit C should the body becomes sick.
Just a precaution. Consult doctor and dietition on this.