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L-Carnitine 1000

product on market Other (e.g. tea bag) GNC Total Lean Safety: 100/100
100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 100% of ingredients have research evidence
A Label Compliance Grade

What the Evidence Says

✨ AI-generated · Qwen 3.6 · grounded in 1 source · methodology

L-carnitine is researched for its role in transporting fatty acids into mitochondria to support energy production. Evidence for its effectiveness in promoting weight loss or athletic performance is generally considered limited to moderate. The ingredient profile maintains a high safety rating for most healthy adults.

AI-generated summary based on research evidence. Not medical advice.

Label

Product Label

Label for L-Carnitine 1000
Open Full PDF View on NIH DSLD →
Details

Label Data

1 White Caplet(s)
Serving Size
30
Servings
Non-Nutrient/Non-Botanical
Product Type
100%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

1 Gram(s)
Market median: 500.0mg (861 products) 61 studies (A:4, B:13)

Other Ingredients

Hydroxypropylcellulose Microcrystalline Cellulose Stearic Acid Cellulose Magnesium Stearate Silicon Dioxide
Claims

Label Claims — Verification

Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Notice: Use in conjunction with the Total Lean Meal and Exercise Plan found on www.totallean.com

Directions: As a dietary supplement, take the contents of one pack daily. Do not take before bedtime.

Warnings & Precautions

Contains a bioengineered food ingredient

Warning: cancer & reproductive harm - www.P65Warnings.ca.gov. Discontinue use two weeks prior to surgery.

Consult your physician prior to using this product if you are pregnant, nursing, taking medication or have a medical condition.

Keep out of reach of children.

Do not take before bedtime.

Formulation Notes

Scientifically formulated nutrition & weight management support system

Fuels fat metabolism with L-Carnitine 1000 & CLA

Gluten free, No milk. Gluten Free

Our quality commitment to you Since 1935, our mission as the industry leader has been to provide you with the highest-quality nutritional supplements. We continue to stand behind this mission. If you're not 100% satisfied with your purchase, return the unused portion of the product with your receipt within 30 days and we'll either refund your money or find a replacement product that is right for you.

Additional Information

Store in a cool, dry place.

30-Day Supply

For more information: 1-888-462-2548 GNC.com

Metadata

Product Details

DSLD Entry Date2024-07-25
Product TypeNon-Nutrient/Non-Botanical
FormOther (e.g. tea bag)
BrandGNC Total Lean
DSLD ID312256
Data Updated2026-04-11
Research

Research Evidence

80
Research Sources
49
Avg Quality
43
Rct
14
Clinical Trial
11
Systematic Review
9
Meta Analysis
2
Regulatory Source
A Propionyl-L-carnitine for intermittent claudication
Meta Analysis The Cochrane database of systematic reviews 2021 PubMed DOI
A Carnitine supplements for people with chronic kidney disease requiring dialysis
Systematic Review The Cochrane database of systematic reviews 2022 PubMed DOI
A Acetyl-L-carnitine for patients with hepatic encephalopathy
Meta Analysis The Cochrane database of systematic reviews 2019 PubMed DOI
A Acetyl-L-carnitine for the treatment of diabetic peripheral neuropathy
Meta Analysis The Cochrane database of systematic reviews 2019 PubMed DOI
B Carnitine for fatigue in multiple sclerosis
Systematic Review The Cochrane database of systematic reviews 2012 PubMed DOI
B L-carnitine for cognitive enhancement in people without cognitive impairment
Meta Analysis The Cochrane database of systematic reviews 2017 PubMed DOI
B Carnitine for fatigue in multiple sclerosis
Systematic Review The Cochrane database of systematic reviews 2010 PubMed DOI
B Systematic Review and Meta-analysis on Effect of Carnitine, Coenzyme Q10 and Selenium on Pregnancy and Semen Parameters in Couples With Idiopathic Male Infertility
Meta Analysis Urology 2022 PubMed DOI
B Effects of Carnitine and Coenzyme Q10 on Sperm Quality and Pregnancy Rates in Men with Unexplained Infertility: A Systematic Review and Network Meta-Analysis
Systematic Review Reproductive sciences (Thousand Oaks, Calif.) 2025 PubMed DOI
B Efficacy and Effectiveness of Carnitine Supplementation for Cancer-Related Fatigue: A Systematic Literature Review and Meta-Analysis
Meta Analysis Nutrients 2017 PubMed DOI
View all evidence for Carnitine →
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This product page is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before taking any supplement.