Should someone with longqt2 (corrected with a defib, no meds) use advocare? more specifically, the 24-day challenge?

Be aware: I would review the entire spectrum of supplements utilized in the 24 day challenge with your cardiologist, as the cleanse phase may involve weak diuretics that may lower your potassium levels - which is bad in the case of long QT syndromes. Also the energy supplements may contain rather high doses of caffeine which can also be suboptimal with long QT syndromes.