Caitlin - thanks. Suzy Cohen typically provides very solid, useful information. Just keep in mind that supplement successes can be highly individualized depending on the patient and what underlying health issues need to be identified to limit some of the predictable reactions. As you've probably read here by now, generally and typically, afibbers are low or unbalanced in the core electrolytes or minerals that are key to assisting with electrical conduction. Very important is the form of the nutrient and what other additives might be included that might not be useful.
It helps to work with a certified nutritionist or a practitioner of functional medicine so nutrient testing can be done to evaluate your personal status. One example is the Metabolic Profile by Genova Diagnostics.[
www.gdx.net] which helps guide you to individual areas of specific focus.
Since it's well accepted that most with arrhythmias are low in magnesium, starting with that nutrient in low doses is usually helpful - ramping up doses slowly to bowel tolerance can help. There are many archived posts on supplement use and the various forms that are preferable. If I can help direct you to some of those, please send am a PM.
Jackie