Save to favorites
This feature is restricted to active members.
Join now to save favorites and get all member benefits, including over 1,400 reviews.
Join NowAlready a member? Sign in here.
Our Members Asked:
A few weeks after starting acetyl-L-carnitine, I became so sluggish I could hardly function. Could this be due to the supplement?
Answer:
Research has shown that carnitine can potentially impair the action of thyroid hormone -- which can cause fatigue and weakness. While this would not be expected to affect people with normal thyroid function, if you have low or borderline-low thyroid levels, this may explain your symptoms. Use of acetyl-L-carnitine or other forms of carnitine is not advisable when thyroid levels are low -- a condition particularly common among women older than 60 years. This and several other potential side effects of acetyl-L-carnitine are described in the "Concerns and Cautions" section of ConsumerLab.com's Acetyl-L-Carnitine Supplements Review >>
Join today to unlock all member benefits including full access to all CL Answers and over 1,400 reviews.
Join NowAlready a member? Sign In Here.
Join now at www.consumerlab.com/join/
Agree to Comment Terms
Please abide by the following:
- If you make a statement of fact, such as whether a type of treatment does or does not work, state your basis -- such as personal experience or a published study.
- If you make a positive or negative comment about a product, note whether or not you have a financial interest in the product or in a competing product.
- Please be respectful in your tone.
- Please do not submit any type of HTML markup or scripting as it will not be accepted, nor will posts that exceed 2,500 characters.
For your privacy, only your first name (from your account) followed by a random number will appear with your comment. Your last name and email address will not be displayed.
Your comment has been submitted
We will review your comment before it is posted.
Join over 95,000 Members
Find the best products with instant access to our latest tests & reviews of over 1,400 health products.
Save money by finding high-quality products at lower cost.
Stay safe with the latest clinical findings, warnings, and expert answers.
Suggest products to test.
Stay informed with our e-newsletter.
Submit your comment
This feature is restricted to active members.
Join now to add comments and get all member benefits, including over 1,400 reviews.
Join NowAlready a member? Sign in here.