Alcohol Metabolism Rate: How the Body Processes Alcohol Blood Alcohol Content (BAC): What It Is & Levels Understanding Blood Alcohol Concentration (BAC) is crucial for staying safe. Here's what different BAC levels can mean for your behaviour and health: Up to 0.05 g%: You may feel good, talkative, relaxed, Can Drinking Water Help You Pass a Breathalyzer? A Guide to Needle and Syringe Choices Blood Alcohol Content Calculator: Understand Your BAC