Acetyl-L-Carnitine

Acetyl-L-Carnitine Supplements Tested by ConsumerLab.com

Learn how to find the best acetyl-L-carnitine supplements. We purchased and tested the ingredients in acetyl-l-carnitine products and rated their quality. Find out which ones passed our test and why.

Acetyl-L-Carnitine Review

Clinical Updates (4)

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8/28/2020

Acetyl-L-carnitine + Alpha-Lipoic Acid for Lowering Blood Pressure?

We were recently asked if taking a combination of acetyl-L-carnitine and alpha-lipoic acid can help lower blood pressure. Find out what research shows in the What It Does section of the Acetyl-L-Carnitine Supplements Review. Also see our answer to the question: Which supplements can help to lower blood pressure?
4/14/2013

Concern Over Carnitine Causing Cardiovascular Disease

Intake of L-carnitine from supplements (and from red meat) may foster atherosclerosis (hardening of the arteries), according to new research. Once ingested, L-carnitine is converted in some people to a compound which reduces the normal clearing of cholesterol from arteries.

For more details, see the updated reviews of B Vitamin Supplements & Energy Drinks and Protein Powders, as some of these products contain L-carnitine. The Acetyl-L-Carnitine Supplements review has also been updated because acetyl-L-carnitine is chemically similar to L-carnitine, suggesting a potential concern.
1/28/2018

L-Carnitine Caution

A study in which L-carnitine was given to women during chemotherapy had a surprising result: It worsened side effects. Get the details in the Concerns and Cautions section of the Acetyl-L-Carnitine Supplements Review.
12/02/2018

Carnitine Heart Risk?

Supplementing with L-carnitine can raise blood levels of TMAO which can potentially advance atherosclerosis. However, the science is not clear, as suggested by a recent study. Get the details in the L-Carnitine section of the Acetyl-L-Carnitine Supplements Review.