Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Didn't work for me

This product did nothing to lower my blood sugar readings. However, it must work for some people as it is recommended by Dr. Richard Bernstein, the chief proponent of extreme low-carb diets. Dr. Bernstein. who likes his patients to maintain A1-C numbers in the normal range (not just in the "normal-for-diabetics" range), writes that he adds it to diets of patients who are not quite hitting the target with traditional medications. Perhaps I will give it a try at a later date, but for now I am getting better results with other products,