L-Carnitine Price Comparison

Live prices from 21 UK suppliers, from £6.00, compared side by side so you never overpay.

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Best Price £6.00
Average £33.85
Highest £72.50
You Could Save 92%
14 results
Alpha Peptides®  logo
★ 5.0
Alpha Peptides®

L-Carnitine

£20.00
95 /100 Confidence In Stock 600mg Lab Tested
Save 72% FREE over £100
PeptideStock logo
★ 4.6
PeptideStock

L-Carnitine

£17.99
87 /100 Confidence Out of Stock 600mg Lab Tested
Save 75% FREE over £75
Lucid Peptides logo

L-Carnitine 600mg

£17.95
77 /100 Confidence Out of Stock 600mg
Save 75% FREE delivery
Best Price
Save 92%
Opti-Gen Peptides logo
Opti-Gen Peptides
★★★★★ 4.8 reviews
63 /100 Confidence

L-Carnitine 600mg

In Stock 600mg
£6.00
FREE delivery
Precision Peptide logo
★ 5.0
Precision Peptide

L-Carnitine 600mg

£15.00
50 /100 Confidence In Stock 600mg
Save 79% FREE delivery
Precision Peptide logo
★ 5.0
Precision Peptide

L-Carnitine 600mg

£45.00
50 /100 Confidence In Stock 600mg
Save 38% FREE delivery
Absolute BioLab logo

L-Carnitine 600mg

£15.00
50 /100 Confidence In Stock 600mg
Save 79% FREE over £100
Genopept logo

L-Carnitine 600mg

£20.00
50 /100 Confidence In Stock 600mg Lab Tested
Save 72% FREE over £200
mrpeptides logo

L-Carnitine 600mg

£35.00
50 /100 Confidence In Stock 600mg Lab Tested
Save 52% FREE over £100
Unavailable
Research Peptides logo

L-Carnitine 600mg

£49.99
50 /100 Confidence In Stock 600mg Lab Tested
Save 31% FREE delivery
Biolabs logo

L-Carnitine 600mg

£51.53
50 /100 Confidence In Stock 600mg
Save 29% FREE delivery
Biolabshopuk logo

L-Carnitine 600mg

£53.99
50 /100 Confidence In Stock 600mg
Save 26% FREE delivery
Unavailable
Biolabshopofficial logo

L-carnitine 600mg

£53.99
50 /100 Confidence In Stock 600mg
Save 26% FREE delivery
Unavailable
Peptides Distro logo

L-Carnitine 600mg

£72.50
50 /100 Confidence In Stock 600mg
FREE delivery
Unavailable

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L-Carnitine Profile

Established FDA Approved

Amino Acid Derivative | Fatty Acid Transporter

Overview

L-Carnitine is an amino acid derivative naturally produced in the body and essential for transporting long-chain fatty acids into mitochondria for energy production. Injectable forms bypass digestive absorption limitations of oral supplements.

Mechanism of Action

Acts as a carrier molecule, shuttling long-chain fatty acids across the inner mitochondrial membrane via the carnitine palmitoyltransferase (CPT) system. This is the rate-limiting step in fatty acid oxidation for energy production.

Key Benefits

  • Enhanced fatty acid transport to mitochondria
  • Improved energy production from fats
  • Better bioavailability than oral forms
  • Support for exercise recovery
  • Potential cognitive benefits

Quick Stats

Typical Dose
50-200mg daily
Frequency
Once daily or pre-workout
Cycle Duration
8-16 weeks (can be used continuously)
Storage
Lyophilized: -20°C; Reconstituted: 2-8°C for 2-4 weeks

Molecular Information

Molecular Weight
161.20 Da
Type
Quaternary ammonium compound
Half-Life
~2-3 hours (injectable)

Research Indications

The following information is derived from published scientific literature and is provided for educational and research reference purposes only. It does not constitute medical advice, diagnosis, or treatment recommendations. These peptides are not approved for human use and are sold exclusively for in-vitro laboratory research.

Fatty Acid Oxidation

Most Effective

Primary function transporting fatty acids into mitochondria for beta-oxidation.

Energy Production

Effective

Supports ATP generation from fat metabolism, particularly during exercise.

Weight Management

Moderate

May enhance fat utilization when combined with exercise and caloric deficit.

Exercise Recovery

Moderate

May reduce muscle damage markers and improve recovery post-exercise.

Endurance Support

Moderate

Enhances fat utilization during prolonged exercise, potentially sparing glycogen.

Carnitine Deficiency

Most Effective

FDA-approved treatment for primary and secondary carnitine deficiency.

Dialysis Support

Effective

Used in patients on hemodialysis who develop carnitine depletion.

Dosing Protocols

injectable

Subcutaneous or intramuscular injection provides superior bioavailability compared to oral supplementation, which is limited to ~15-20% absorption.

Goal Dose Frequency Route
Standard Protocol 50-100mg Daily SubQ
Advanced Protocol 100-200mg Daily SubQ or IM
Pre-Workout 100-200mg 30-60 min before exercise SubQ

Key Tips

  • ~100% bioavailability vs ~15-20% oral
  • Rapid absorption
  • Precise dosing control
Materials Needed
L-Carnitine lyophilized powder (typically 200mg vial) Bacteriostatic water (2.0mL recommended) Insulin syringes (29-31 gauge) Alcohol swabs
Steps
  1. 1 Allow vial to reach room temperature
  2. 2 Clean rubber stopper with alcohol swab
  3. 3 Add 2.0mL bacteriostatic water for 100mg/mL concentration
  4. 4 Inject slowly along vial wall
  5. 5 Gently swirl to dissolve; never shake
  6. 6 Label with date and store refrigerated at 2-8°C
  7. 7 Use within 2-4 weeks of reconstitution

Peptide Interactions

Thyroid Hormones

Monitor

L-Carnitine may affect thyroid hormone action. Those on thyroid medication should monitor levels.

Anticoagulants

Monitor

May enhance effects of warfarin and similar medications.

What to Expect

Immediate

Injectable form provides rapid absorption within 30-60 minutes

Week 1-2

Potential improvements in energy and exercise capacity

Week 4-8

Cumulative benefits on fat metabolism and recovery

Week 8-16

Full metabolic optimization when combined with exercise

Side Effects & Safety

Common Side Effects

  • Injection site reactions
  • Mild nausea
  • Body odor (fishy smell at high doses)

Monitoring

  • Generally well-tolerated with established safety profile
  • FDA-approved for carnitine deficiency
  • Monitor thyroid function if on thyroid medication

Stop Signs

  • Allergic reactions (rare)
  • Severe gastrointestinal distress
  • Unusual muscle weakness

Contraindications

  • Seizure disorders (may lower seizure threshold)
  • Hypothyroidism (may affect thyroid function)
  • Allergy to carnitine products

Quality Checklist

Good Signs

  • White crystalline powder
  • Clear, colorless solution after reconstitution
  • Certificate of Analysis with purity testing

Warning Signs

  • Should dissolve completely without residue

Bad Signs

  • Discolored powder
  • Cloudy or particulate solution
  • Strong unusual odor

Research & References

Key References

  1. 2018

    L-Carnitine Supplementation and Exercise

    Meta-analysis showing modest benefits of L-carnitine on exercise performance and recovery markers.

  2. 2012

    Carnitine Metabolism and Function

    Comprehensive review of carnitine's role in fatty acid transport and energy metabolism.

Search PubMed for L-Carnitine

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