Instruct: Classify a review into positive or negative sentiment.
Query: Careful with this supplement

I got this because I had read that dong quai would be helpful with hair & skin. I took as recommended on the label. Within a week I started my period 2 weeks too soon, and it was a painful, crampy one,for more than 7 days. More research led me to understand that this could happen with this product. This supplement has been used for many female reasons, such as prompting your period to come sooner so as to avoid having it while on vacation,for example, or even to help abort when early, early on in pregnancy. So do not take this lightly without doing research and really knowing what you want to use it for. I only gave it 2 stars because it didn't work out for what I originally thought it was for. If I had wanted it to jump start my period, that would be 5 stars!