这是厂家的回信：

Good morning Gang,
Thank you for your interest in New Hope Mills products.
I did some research and found that our Unbleached unenriched Bread flour does contain a small amount of Folic Acid. Per 100 grams there is .15 grams of folic acid.
I hope this answers your question.


Best regards,
Melissa

他们显然把单位弄错了：

Did you mean 0.15 milligrams of folic acid in 100 grams of flour?

得到确认:
Yes, sorry about that