L-carnitine
Tartrate, acetyl-L-carnitine, liquid or capsules: what L-carnitine is, how the forms differ and why we promise no weight loss.
This substance has no health claim authorised in the European Union. So we describe what it is and how it is taken, but do not say what it does in the body.
What it is
L-carnitine is a substance the body makes itself from the amino acids lysine and methionine; from food it comes mainly from red meat. The name comes from the Latin carnis, meat.
Health claims for L-carnitine, including fat loss and endurance, were assessed in the European Union and not authorised. So we describe forms and choice, and promise nothing about weight or training.
Forms
L-carnitine L-tartrate (LCLT) is the common form in capsules and powders, holding about 68 % L-carnitine. Pure L-carnitine appears in liquids and shots. Acetyl-L-carnitine (ALCAR) is a different form, often sold on its own. Carnipure is a Swiss-made L-carnitine brand. Compare the L-carnitine itself per serving.
How it is taken
Makers usually state 1–2 g of L-carnitine a day, as the pack directs. Liquids are easy to drink before training or in the morning. People with thyroid or kidney conditions or epilepsy, and pregnant or breastfeeding women, should ask a doctor first.
Frequently asked questions
Does L-carnitine help with weight loss?
No such claim is authorised in the EU, so we do not say it. L-carnitine is a food supplement, not a weight-loss product.
How is tartrate different from acetyl-L-carnitine?
They are different forms. Tartrate is about 68 % L-carnitine; acetyl-L-carnitine is a separate compound with its own doses.
Liquid or capsules?
Liquid is easy to measure and drink, capsules easier to carry. Compare L-carnitine per serving and the price.
When should L-carnitine be taken?
Makers usually state the morning or before training; follow the pack.
Is there L-carnitine in food?
Yes, most in red meat; plant foods hold little.
L-carnitine in the shop
