@glojo
Thank you for posting your experience with MK7 and palpitations! I am also prone to palpitations and have been experiencing them frequently for many months now and have been trying to narrow down causes. I will discontinue MK7 and purchase the MK4 today and see if it makes a difference. I have experienced palpitations on and off since I was 20 and so far the only supplement I have found to cause them (in my case) is COQ10. I will start doing some research today on MK7 and I am so thankful for this community on Mayo. Blessings to you!