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Acetyl-L-Carnitine and L-Carnitine: study protocols

14 study groups took Acetyl-L-Carnitine together with L-Carnitine. These are the doses the studies gave. They are not a recommendation.

Acetyl-L-Carnitine: what the research found →

Dose per serving from research: Acetyl-L-Carnitine

14 study groups in 8 studies say how much Acetyl-L-Carnitine participants took a day.

These are the doses the studies gave. They are not a recommendation.

Most common: 500 mg to 1 g, 93% of 14 study groups.

Daily doseStudy groups
500 mg or less
1
500 mg to 1 g
13

Dose per serving from research: L-Carnitine

13 study groups in 7 studies say how much L-Carnitine participants took a day.

These are the doses the studies gave. They are not a recommendation.

Most common: 1 g to 2.5 g, 92% of 13 study groups.

Daily doseStudy groups
1 g or less
1
1 g to 2.5 g
12

Commonly used together

3 of 14 study groups took Acetyl-L-Carnitine and L-Carnitine with something else. Shown: what 3 or more different studies gave.

What was given together, not what works together.

Taken withStudy groups
Vitamin C
3
Zinc
3

14 study groups

Study
Cinnoxicam and L-carnitine/acetyl-L-carnitine treatment for idiopathic and varicocele-associated oligoasthenospermia
2004 · group 3 · Adults with idiopathic or varicocele-associated oligoasthenospermia
1 g2 g26 weeks106
Cinnoxicam and L-carnitine/acetyl-L-carnitine treatment for idiopathic and varicocele-associated oligoasthenospermia
2004 · group 2 · Adults with idiopathic or varicocele-associated oligoasthenospermia
1 g2 g26 weeks101
[A controlled randomized trial of the use of combined L-carnitine and acetyl-L-carnitine treatment in men with oligoasthenozoospermia]
2005 · treatment group · men with oligoasthenozoospermia
1 g2 g90 days90
A placebo-controlled double-blind randomized trial of the use of combined l-carnitine and l-acetyl-carnitine treatment in men with asthenozoospermia
2004 · combined l-carnitine and l-acetyl-carnitine treatment · Infertile men aged 20–40 years with oligo-astheno-teratozoospermia and abnormal baseline sperm parameters
1 g2 g26 weeks—
Placebo-controlled double-blind randomized trial on the use of L-carnitine, L-acetylcarnitine, or combined L-carnitine and L-acetylcarnitine in men with idiopathic asthenozoospermia
2005 · Combined L-carnitine and L-acetyl-carnitine · Men aged 20–40 years with idiopathic asthenozoospermia
1 g2 g26 weeks—
Antioxidant treatment for oligoasthenoteratozoospermia and varicocele: a DBPC trial to evaluate the impact of age and body mass index
2024 · supplementation formulation (Proxeed Plus) · Men aged 18–50 years with infertility and oligo-, astheno- and/or teratozoospermia, with or without varicocele
500 mg1 g26 weeks—
Double-blind, randomised, placebo-controlled trial on the effect of L-carnitine and L-acetylcarnitine on sperm parameters in men with idiopathic oligoasthenozoospermia
2019 · Proxeed Plus · Men aged 19–44 with idiopathic oligoasthenozoospermia and difficulty conceiving with their partners for at least 12 months
1 g—26 weeks125
[Using L- and acetyl-L-carnintines in combination with clomiphene citrate and antioxidant complex for treating idiopathic male infertility: a prospective randomized trial]
2017 · study group · Men aged 25–45 with idiopathic oligo-, astheno- and/or teratozoospermia
1 g2 g120 days88
[Antioxidant therapeutic efficiency after the use of carnitine in infertile patients with bacterial or non bacterial prostato-vesiculo-epididymitis]
2001 · B1 · Infertile men with bacterial PVE, mean age 35 years (range 28–38)
1 g2 g90 days23
[Antioxidant therapeutic efficiency after the use of carnitine in infertile patients with bacterial or non bacterial prostato-vesiculo-epididymitis]
2001 · B2 · Infertile men with bacterial PVE, mean age 35 years (range 28–38)
1 g2 g90 days16
[Antioxidant therapeutic efficiency after the use of carnitine in infertile patients with bacterial or non bacterial prostato-vesiculo-epididymitis]
2001 · A1 · Infertile men with abacterial prostato-vesiculo-epididymitis (PVE), mean age 34 years (range 27–40)
1 g2 g90 days14
[Antioxidant therapeutic efficiency after the use of carnitine in infertile patients with bacterial or non bacterial prostato-vesiculo-epididymitis]
2001 · B3 · Infertile men with bacterial PVE, mean age 35 years (range 28–38)
1 g2 g90 days12
[Antioxidant therapeutic efficiency after the use of carnitine in infertile patients with bacterial or non bacterial prostato-vesiculo-epididymitis]
2001 · A2 · Infertile men with abacterial PVE, mean age 34 years (range 27–40)
1 g2 g90 days8
[Antioxidant therapeutic efficiency after the use of carnitine in infertile patients with bacterial or non bacterial prostato-vesiculo-epididymitis]
2001 · A3 · Infertile men with abacterial PVE, mean age 34 years (range 27–40)
1 g2 g90 days8
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