This works too for me. Started taking 1 heaping tablespoon for extra silica hoping to ease tendonitis. Noticed after a couple of days my high heart rate was lower. With this I also feel calmer, less anxious. Will continue taking.
I am overweight & was not only concerned but embarrassed that my heart rate would skyrocket at the slightest exertion (like going up half a flight of stairs, bending over to pick up laundry, or even just standing up! ). It would also beat so hard that when I was in bed, I could see my blanket or the book I was reading shaking. I tried doing cardio for at least 30-45 minutes at a time, because I thought I must be terribly out of shape. I could only walk at a moderate pace, or my heartrate would go out of the safe range.
I have taken DE a few times over the years, but had not been taking it for awhile. I started taking it again because my hair was falling out. I took it at night, because it also seems to help me sleep. On the morning after my second dose, I noticed that my heart rate was slower!!!
In less than 2 weeks, it went from being over 100 resting & in the 120s while standing to being in the 80s! After a couple more months of doing this (and not being able to increase exercise due to a car accident), my resting heart rate is now about 70. And I have to run twice as fast on my elliptical to get my heart rate into the target zone!
Just goes to show that this condition was NOT caused by my weight or being out of shape, but perhaps by a mineral deficiency. I've heard that DE increases bioavailability of other minerals, such as calcium, as well as being beneficial itself because of the silica content.
I also had high blood pressure at the time, but want to point out that the DE did not help with it. They seem to be 2 entirely different issues. I could have a fast heart rate and normal blood pressure, or vice versa. I did start taking hawthorn berry, full spectrum olive leaf, potassium, Vitamin C, and hibiscus tea, and my blood pressure is wonderful--again without losing weight or getting in better shape (although I'm working on those 2 things, also! ). I'll try to post that in the hypertension section.
I really hope this info helps someone. I was so frightened and frustrated by this condition, and I'm so relieved that it has improved!
Oh, I almost forgot; every night, I mix 1-2tbsp into about 8oz water, and drink it down quickly. You may want to start out with a smaller dose & work your way up, as it can have a cleansing affect. Good luck!