Browse/Amino Acid
Amino Acid

Acetyl-L-Carnitine (ALCAR)

01 / OVERVIEW

What this compound does

WHAT IT DOES

Acetyl-L-Carnitine helps your body convert fat into energy, which can give you more stamina throughout the day. It also supports brain health, potentially improving memory and focus, especially as you age. Many people take it to feel more energetic and mentally sharp.

KEY BENEFITS
Improved energy levels
Enhanced mental clarity
Support for brain health
Potential mood enhancement
Aid in fat metabolism
BEST FOR
  • • Adults looking to boost energy
  • • Older adults wanting to support cognitive function
  • • Individuals seeking weight management support
WHAT TO EXPECT

Users may start to notice increased energy and improved mental clarity within a few weeks of consistent use. Effects can vary based on individual metabolism and health status.

WHO SHOULD AVOID THIS
  • • Pregnant or breastfeeding women
  • • People with thyroid disorders
  • • Individuals with a history of seizures
MYTHS & FACTS
Myth: Acetyl-L-Carnitine is just a weight loss supplement.
Fact: While it may aid in fat metabolism, its primary benefits include supporting energy production and cognitive health, not solely weight loss.
Myth: All forms of carnitine are the same.
Fact: Different forms of carnitine have distinct properties and effects; Acetyl-L-Carnitine is particularly noted for its cognitive benefits.
At a glance
Typical dose
500-2000 mg/day
Evidence
—
Studies indexed2
How it's made

Production details below.

03 / DOSAGE

How much, when

MAINTENANCE

500-2000 mg/day

morning on empty stomach or pre-workout

TIMING

Acetyl-L-Carnitine (ALCAR) — Morning dose

Take on empty stomach

02 / EVIDENCE

Peer-reviewed studies

  • PMID: 12614534

    Cognitive aging support

    ALCAR improved memory and cognitive function in early Alzheimer's and MCI studies.

    B
  • PMID: 12656831

    Neuropathic pain

    Reduced neuropathic pain scores in diabetic and chemotherapy-induced neuropathy.

    B
  • PMID 34896904 · 2022RCT

    Probiotic supplement attenuates chemotherapy-related cognitive impairment in patients with breast cancer: a randomised, double-blind, and placebo-controlled trial

    B
  • PMID 30122200 · 2018RCT

    Daily oral supplementation with collagen peptides combined with vitamins and other bioactive compounds improves skin elasticity and has a beneficial effect on joint and general wellbeing

    B
  • PMID 9627906 · 1998Narrative Review

    The role of carnitine and carnitine supplementation during exercise in man and in individuals with special needs

    B
  • PMID 17309390 · 2007Narrative Review

    Algorithm for complementary and alternative medicine practice and research in type 2 diabetes

    B
04 / INTERACTIONS

Medicine interactions

  • Warfarin· blood_thinner

    Acetyl-L-Carnitine may affect blood clotting mechanisms.

    → Monitor INR levels closely if using both.

    MODERATE

  • Thyroid medications· thyroid_med

    May influence thyroid hormone metabolism.

    → Consult with a healthcare provider before combining.

    MODERATE

  • Antidepressants· SSRI

    Potential for additive effects on mood regulation.

    → Use with caution and monitor mood changes.

    LOW

This page is a reference summary, not a prescription. Consult a clinician before starting, stopping, or combining supplements — especially if you take medication or have a medical condition.