When I first purchased this, I bought enough for 2 months (2 orders). I was nearing the end of three weeks of taking this product and had not noticed any real difference to be honest and then all the sudden, the hot flashes stopped completely. It dawned on me one day - wow, I have not had a hot flash in days - at night or in the daytime. But I'm NEW to this whole hot flash thing. So whether this product really is doing the job OR it's coincidental and I will go in and out of hot flashes I don't know. But I read somewhere else about this product that for some women the relief was immediate; for some it took about a month. I think I'm the latter - it took 3 weeks but when they stopped, they stopped. Just hoping they don't make a return down the road. Mine were never overly severe at this point, but not having them at all is definitely my preference. I'd say to others; give it a try BUT be willing to take it every day for at least a month before you pass judgment on it.