is it safe to use acerola vitamin C in pregnancy?

now im in 3rd trimester, i want to start taking extra C for various reasons, ive made the decision i want to. but i would prefer to take an organic vitamin C as Ive read much of synthetic vitamin C on the markets these days is genetically modified. does anyone know if acerola C is ok to take in pregnancy?
i asked my naturopath but she seems very set on the brands she sells and wanted me to take a synthetic one which i'd rather not, but she wouldnt comment on acerola C because she said she wasnt familiar with the product - its just plain vitamin C from acerola berries 125mg per capsule which seems quite a low dose.
i find conflicting info on the net.