is expired l-carnitine safe L-Carnitine: Benefits, Side Effects, FAQ, Sources, and Dosage How to Choose the Best

mtDNA from hepatocytes released into circulation promote inflammation through binding to endosomal TLR9 of liver resident Kupffer cells ( 6 in Figure 1) ( Non-alcoholic fatty liver disease is a vivid example of how systemic immune responses are regulated by metabolism, and that harmful local fibrosis of the liver can develop if these systemic metabolic disturbances remain unresolved

While the discussion about pH clarified why your formulation might have a low pH (likely due to it being Acetyl L-Carnitine), this doesn't override the staff's warning about the raw ingredient's condition

Role of active site residues on catalytic activity of catalase with oxidase activity fromScytalidium thermophilum

Umar S, van der Laarse A (2010) Nitric oxide and nitric oxide synthase isoforms in the normal, hypertrophic, and failing heart