a combination of l-carnosine dmae and acetyl-l-carnitine The Difference Between L-Carnitine & Acetyl L-Carnitine – Swanson Vitamins WORKOUT SUPPLEMENTS
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10.1373/clinchem.2006.067793 [DOI] [PubMed] [Google Scholar] Salem H

Cochlear functional testing ABRs were measured bilaterally, testing each ear separately in a sound booth (Industrial Acoustics Company)

Kramer, L

Marnewick, J.L., Van Der Westhuizen, F.H., Joubert, E., Swanevelder, S., Swart, P., Gelderblom, W.C.A

PMID 21413691
