Acetyl L Carnitine (ALCAR) for Cognition and Mental Energy PureBulk, Inc. L carnitine is involved in transporting fatty acids into your cells' mitochondria to be burned for energy. During a bulk, the idea is to gain muscle, ideally with minirmal fat gain. Here's how, Amazon.com: BulkSupplements.com L Carnitine 1000mg Capsules Carnitine Supplement, Amino Acid Supplement Gluten Free, 2 Capsules per Serving (1000mg), 240 Count (Pack of 1) : Health & Household Injectable l carnitine has 100% bioavailability and its a supplement, not steroid., Even as a natty you can use and it can also help you in your bulking process, not just in fat loss. , ., Baaki if Bulk Nutrients Acetyl Carnitine 250G