Arginine AKG (AAKG)

●○○Limited Evidence

Arginine combined with alpha-ketoglutarate. Less effective than citrulline for raising plasma arginine due to extensive first-pass metabolism. Largely superseded by citrulline.

Effective Dose

3–6g / day

per clinical evidence

Evidence Level

Limited

Blood Flow & Pump

Mechanism

Arginine precursor to NO (via eNOS)

primary action

Best For

Pump

Blood flow

This profile is for informational purposes only and does not constitute medical advice. Consult a qualified healthcare professional before starting any supplementation, especially if you have pre-existing conditions or take medications.

What Is Arginine AKG (AAKG)?

Arginine AKG was a popular pump ingredient before citrulline's superior pharmacokinetics were established. Oral arginine is 50–70% destroyed before reaching systemic circulation (first-pass arginase metabolism in the gut and liver). Citrulline bypasses this limitation, making AAKG a largely obsolete ingredient.

How It Works: The Science

Any arginine that survives first-pass metabolism activates eNOS to produce NO. AKG (alpha-ketoglutarate) may support energy metabolism via the Krebs cycle. However, multiple studies confirm that citrulline raises plasma arginine more effectively than oral arginine at equivalent doses.

Primary Mechanism

Arginine precursor to NO (via eNOS)

Evidence-Based Benefits

Modestly increases plasma arginine and NO metabolites

limited

Less effective than citrulline at achieving the same plasma arginine elevation

Dosage Guide

Effective Dose

3–6g / day

3–6g pre-workout. Inferior to citrulline — if budget allows, replace with 6–8g L-citrulline.

Safety Profile & Side Effects

Safe at standard doses. Avoid with erectile dysfunction medications (additive blood pressure reduction).

Who Should (and Shouldn't) Take It

Best for

PumpBlood flow

Who it's for

Found in legacy pre-workouts. Choose citrulline instead if formulating or selecting a new product.

Frequently Asked Questions

What is the recommended dose of Arginine AKG (AAKG)?

3–6g pre-workout. Inferior to citrulline — if budget allows, replace with 6–8g L-citrulline.

Is Arginine AKG (AAKG) safe?

Safe at standard doses. Avoid with erectile dysfunction medications (additive blood pressure reduction).

How does Arginine AKG (AAKG) work?

Who should take Arginine AKG (AAKG)?

Found in legacy pre-workouts. Choose citrulline instead if formulating or selecting a new product.

Related Ingredients

L-Citrulline / Citrulline Malate Nitrosigine (Arginine Silicate)Agmatine Sulfate

Medical Disclaimer

Ingredient profiles are for informational purposes only and do not constitute medical advice. Consult a qualified healthcare professional before starting any supplementation, especially if you have pre-existing conditions or take medications. Full disclaimer →