Thorne Acetyl L Carnitine Capsules, 500 mg, Supports Brain Function and Healthy Nerve Sensations Walmart.com L CARNITINE Ampoules Mesotherapy Serum for Body Treatments from Natude Dermishop Amazon.com: Natural Factors, Acetyl L Carnitine 500 mg, Promotes a Healthy Memory, Concentration and Brain Function, 120 capsules (60 servings) : Everything Else L carnitine injection original Gym, Fitness & Combat sports 112300565 Supplement brand Thorne is on pace to reach $650 million in annual revenue this year, fueled by Gen Z and millennial shoppers who are increasingly focused on improving their health., CNBC's Gabrielle