Berberine and L Carnitine: Safety, Benefits and Dosage Guide Bolt Pharmacy Effectiveness varies: L carnitine may help with fat metabolism, but it's not a magic weight loss pilldiet and exercise still matter most. Forms matter: Regular L carnitine general use Acetyl L carnitine brain & energy Acetyl L Carnitine is a modified form of carnitine that has the dual benefit of supporting mental fatigue, improving mood levels and alertness as it crosses the blood brain barrier with ease while supporting Applied Nutrition Acetyl L Carnitine Kuwait Supplements