I started taking Heart Studies a few years ago after an episiode of extreme jaw pain followed by chest pain that lasted for a while. I had had similar episodes before but not as severe; so I knew I had to be proactive in dealing with it. Since I started taking Heart Studies consistently a few years ago, I had not had another episode even though I got little sleep and worked very hard physically, doing housework sometimes from morning until night, over 8 hours. I ran out of Heart Studies about 3 months ago and continued working as I had been. After about 3 months of NOT taking Heart Studies, I had another scarey episode with my heart, which truly made me see the difference that it makes in my heart health. I just got busy and didn't take the time to order it. I won't let that happen again. I just received a new bottle yesterday and already am starting to feel stronge!! I highly recommend this product.