How Many Calories Are in RL Fluid? Understanding Lactated Ringer's
                                
                                
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                                    3 min read                                
                            
                                While Lactated Ringer's (RL) is a common intravenous fluid, a standard liter of RL fluid contains only about 9 calories, derived from the metabolism of lactate. This makes RL a negligible source of energy, unlike IV solutions that contain dextrose or glucose for nutritional support.