Amino Acid
Arginine AKG
Also known as: L-arginine-alpha-ketoglutarate, L-arginine alpha-ketoglutarate, AAKG, Arginine-AKG
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.
Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.
Every Arginine AKG product we have scored
| # | Product | Score | Per serving |
|---|---|---|---|
| 1 | Nootropics Depot AAKG 2 | 90 A | $0.33 |
| 2 | Nutricost Pre-Workout For Women Powder | 89 A | $0.73 |
| 3 | Nutricost Pre-Workout Complex | 89 A | $0.83 |
| 4 | Nootropics Depot AAKG 2:1 Powder | 86 A- | $0.33 |
| 5 | Nutricost Nitric Oxide Booster | 76 B+ | $0.28 |
Scored on dose accuracy, form, label transparency and third-party testing. Per-serving cost is list price divided by servings per container. No brand pays to be listed or ranked.
Common questions
How much Arginine AKG should I take?
The typical range is 3-6 grams daily. Acute studies typically 4-12 weeks; chronic nitric oxide benefits may require consistent supplementation
When should I take Arginine AKG?
Pre-workout (30-60 minutes prior) for acute effects, or daily for chronic use. Can be taken with or without food; better tolerated with food for sensitive individuals.
Which form of Arginine AKG is best?
Powder. Other forms in the catalog: Capsule, Tablet.
Is Arginine AKG safe?
Commonly reported: Gastrointestinal distress (nausea, diarrhea, bloating), Headache, Hypotension (in sensitive individuals), Nausea at higher doses.
Which Arginine AKG supplement scores highest?
Nootropics Depot AAKG 2, at 90/100. Scored on dose accuracy, form, label transparency and third-party testing — no brand pays to be listed or ranked.
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)
Products containing Arginine AKG
Top-scoring supplements in our catalog that list Arginine AKG on the label. Each product is graded on Formulate's ingredient-level rubric — dose accuracy, form, transparency, and third-party testing.
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.
Related in Amino Acid
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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.