L-carnitine was first isolated in 1905 from meat extracts (hence the name, from the Latin “carnis”), with its biological role elucidated decades later: it transports long-chain fatty acids into the mitochondria, the cell’s energy centres, where they are oxidised to produce ATP. The acetyl group in ALC additionally allows it to cross the blood-brain barrier and serve as a substrate for acetylcholine synthesis, the neurotransmitter involved in memory.

Like other carnitine forms, ALC ferries long-chain fatty acids across the inner mitochondrial membrane via the carnitine-acylcarnitine translocase shuttle, feeding into beta-oxidation and the Krebs cycle to generate ATP. Its acetyl group can also be transferred directly to coenzyme A, and can serve as a substrate for brain acetylcholine synthesis, supporting cognitive function.

Carnitine is found mainly in animal foods — red meat is the most concentrated source, followed by pork, fish, poultry and dairy — while plant sources contain only trace amounts. The body also synthesises some carnitine from lysine and methionine, but this may not cover needs for vegans, older adults, or people with higher energy demands.

Take 1 to 2 capsules, once or twice a day as needed, ideally between meals with a large glass of water. Daily dosage can range from 500mg to 2,000mg depending on individual goals.

For adults. Do not exceed the recommended daily dose. Not a substitute for a varied, balanced diet. If pregnant, breastfeeding, or taking medication, consult a healthcare professional before use.

What is the difference between L-carnitine and acetyl-L-carnitine?

Both share the same basic role in transporting fatty acids to the mitochondria. ALC’s acetyl group additionally lets it cross the blood-brain barrier and support acetylcholine synthesis, so it’s often favoured by those seeking both energy and cognitive support.

Is acetyl-L-carnitine suitable for vegans?

Yes — the capsules are vegetable-based (hypromellose) with no animal-derived ingredient, and it’s a particularly relevant supplement for vegans given that dietary carnitine sources are almost exclusively animal-based.

Herba Barona is an independent specialist supplement shop in the heart of Paris — established in 2006. What you order is genuinely on our shelves: we ship from our own stock, with no dropshipping and no long waits.

Visit us at 10 rue Théophile Roussel, Paris 12 — or use Click & Collect and pick up your order in-store. We also deliver across France and Europe. Friendly, expert advice in English from our team.

Where is the shop?

Herba Barona is at 10 rue Théophile Roussel, 75012 Paris — a two-minute walk from Ledru-Rollin (line 8), close to Bastille. Open Tuesday to Saturday, 9:30 am–6:30 pm.

Can I order online or collect in store?

Yes. We ship across France and Europe under the same conditions as our French store, or choose Click & Collect to pick up your order for free at our Paris shop.