L Carnitine: Benefits, Side Effects, FAQ, Sources, and Dosage Peptide Calculator Honest Peptide Did you know L carnitine, a vital amino acid, is naturally produced by your body and found in various foods? While acetyl L carnitine (ALCAR) can be a beneficial supplement for some, most people get If you're shaking the vial, you're probably shredding the peptide. Five common reconstitution mistakes each one costs you potency, money, or both: 1. Shaking instead of swirling (denatures the peptide) 2.