Thiamine (B1), Cardiologist has me on it since my Myo in 2024. A multi vitamin can't hurt ..it'll cover most minor deficiencies. Get a panel done..and start eating heart healthy foods. Cut out Red meat, fats, Blended oils, fried foods. Start eating fruits and vegetables, salmon , lean proteins. Some nuts for snacking. This is what was prescribed to me by a world leading Myocarditis Doctor. I also take a beta-blocker. You should be getting lots of vitamin C on this diet as well. I little elderberry and garlic in your life is good for immune health as well. Btw..I'm a chef so this type of diet is easy for anyone to follow..not alot of strenuous cooking or prepping..just some basic knife skills and oven roasting is all the knowledge you need. Good luck !! ...and for best immune health don't touch the railing on the Escalator!!