l carnitine increased heart rate Muscle Pharm L-Carnitine 3000, The Ultimate Liquid Supplement for High-Performance, Supports Metabolism, Hydration & Energy, Zero Sugar, Low Calories, Peach Nectarine Flavor, 32 Servings : Everything Else Revisiting the Role of Carnitine

Various approaches have been taken to reduce oxidative stress in models of CKD and accelerated CVD, ranging from reducing oxidant intake in food stuffs [93, 94] to targeted polypharmaceutical compounds

Chronic administration of high doses of oral levocarnitine in patients with severely compromised renal function or in ESRD patients on dialysis may result in accumulation of the potentially toxic metabolites, trimethylamine (TMA) and trimethylamine-N-oxide (TMAO), since these metabolites are normally excreted in the urine

Effect of L-carnitine on health-related quality of life in patients with liver cirrhosis

While these timelines are standard, they arent guaranteed

Carnitine deficiency may cause various health issues affecting heart and muscle function