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Amino Acid

Arginine AKG

Also known as: L-arginine-alpha-ketoglutarate, L-arginine alpha-ketoglutarate, AAKG, Arginine-AKG

C
Evidence

Arginine AKG is a salt form combining L-arginine with alpha-ketoglutarate, designed to enhance nitric oxide production and support muscle protein synthesis. Evidence for performance and cardiovascular benefits remains preliminary, with mixed results in clinical studies.

Primary uses

  • Nitric oxide production
  • Blood flow enhancement
  • Muscle protein synthesis
  • Exercise performance
  • Vascular function

How it works

  • Substrate for nitric oxide synthase (NOS), supporting endothelial nitric oxide production
  • Alpha-ketoglutarate provides TCA cycle intermediary to support energy metabolism
  • Vasodilation through NO-mediated pathways

Dosage

Typical range
3-6 grams daily
Timing
Pre-workout (30-60 minutes prior) for acute effects, or daily for chronic use
With food
Can be taken with or without food; better tolerated with food for sensitive individuals
Duration
Acute studies typically 4-12 weeks; chronic nitric oxide benefits may require consistent supplementation
Special populations
Avoid or use cautiously in individuals with history of herpes simplex (arginine may promote viral replication); pregnant/nursing should consult healthcare provider

Forms

  • Powder· 70/100
  • Capsule· 70/100
  • Tablet· 70/100

Safety

Common side effects

  • Gastrointestinal distress (nausea, diarrhea, bloating)
  • Headache
  • Hypotension (in sensitive individuals)
  • Nausea at higher doses

Contraindications

  • Active herpes simplex infection (may exacerbate symptoms)
  • Severe hypotension
  • Recent myocardial infarction (use with medical supervision)
  • Concurrent use of erectile dysfunction medications (additive vasodilation risk)

Evidence notes

L-arginine has moderate evidence for vascular function, but the AKG salt form lacks robust RCT data demonstrating superiority over standard L-arginine. Performance benefits in athletes remain inconsistent across studies.

Grade C: Mostly observational or small trials; mechanism is plausible but unproven at scale.

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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider.