Acetyl L-Carnitine by Nutricost
Each capsule delivers 500mg of acetyl-L-carnitine (ALCAR), at a suggested serving of one capsule daily — 180 servings per bottle. Acetyl-L-carnitine differs from standard L-carnitine by an added acetyl group, which allows it to cross the blood-brain barrier more readily, and is the basis for its particular research interest in cognitive function specifically, distinct from L-carnitine’s more general role in transporting fatty acids for energy production.
Manufactured in an NSF-certified, GMP-compliant facility, with each batch independently tested in third-party ISO-accredited laboratories.
Worth knowing: acetyl-L-carnitine has a genuine, EU-authorised health claim for contributing to normal cognitive function — a real regulatory claim, not marketing language, which sets it apart from many ingredients in this category. It’s worth being precise about dose, though: most human research specifically behind this cognitive benefit has used considerably more than 500mg daily — commonly 1,500-2,000mg or more, depending on the specific outcome studied. At one capsule (500mg) daily, this product sits below the range typically used in that research, which is worth factoring into your expectations, or discussing with a pharmacist if you’re specifically aiming to match a studied dose.
Safety Considerations
Acetyl-L-carnitine is generally well tolerated, though possible side effects include stomach upset, nausea, dry mouth, headache, and changes in blood pressure. A distinctive, harmless but worth-knowing side effect is a “fishy” odour to sweat, urine, and breath in some people, related to how carnitine is metabolised.
A genuine medication interaction worth knowing: acetyl-L-carnitine may increase the blood-thinning effect of warfarin. If you take warfarin, speak to your GP before starting, since your dose or monitoring may need adjusting.
As with any supplement, consult a healthcare professional before use if you are pregnant or breastfeeding, take regular medication, or have an existing medical condition. Suitable for healthy adults aged 18 and over.
Ingredients
Acetyl L-Carnitine, gelatin capsule, magnesium stearate (vegetable source), microcrystalline cellulose, silica.
