All Acetyl-l-Carnitine Is Not Created Equal

September 17, 2018

NOW recently tested seven unknown brands of Acetyl-l-Carnitine from Amazon in order to test potency and compare label claims. It seems that virtually all known brands label Acetyl-l-Carnitine properly, which is “Acetyl-l-Carnitine (from Acetyl-l-Carnitine HCl)”. This is correct in that ALC is about 85% elemental & it takes 600mg of the ALC HCl form in order to make label claim of 500mg ALC. Unfortunately, almost all small brands on Amazon label incorrectly in order to get the higher 500mg label claim. This is very misleading and a deceptive way to compare similar products. Below shows the brands we tested and their lot numbers. All products were purchased on Amazon in the past 30 days. None of these brands met label claims for true ALC, as all mislabel and do not list the net potency from ALC HCl. Three brands did meet label claim in the misleading way these are labeled.

As a result of this investigation, NOW will begin adding additional detail to our product labels for Acetyl-l-Carnitine, as well as other products such as l-Ornithine and l-Lysine. Once our label changes are complete, you can expect to see our products labeled like this on the side panel:

Acetyl-l-Carnitine……………..500mg
   (From 600mg Acetyl-l-Carnitine HCl)

Brand Vendor Lot # Label Claim Acetyl L-Carnitine Result Acetyl L-Carnitine HCl Result
Pure Science C106515 525 mg 434mg 512mg
Nature's Trove 100805 500 mg 458mg 540mg
Bri Nutrition 2017-01508 500 mg 394mg 465mg
Superior Labs 802022 500 mg 421mg 497mg
Devine Bounty AC53374 600 mg 536mg 632mg
Best Naturals 061817 1000 mg 852mg n/a
aSquared 01081802 500 mg 127mg n/a