What is L-Arginine Alpha-Ketoglutarate (AAKG)?

AAKG is a compound that combines the amino acid L-arginine with alpha-ketoglutarate. It is commonly used in sports supplements to support nitric oxide-related blood flow and exercise performance.

How much AAKG is typically taken?

Common supplemental amounts are about 3–6 g per day. Dosing is often split or taken before workouts depending on tolerance and goals.

Does AAKG increase nitric oxide?

L-arginine is a precursor involved in nitric oxide production, so AAKG is marketed for nitric oxide support. Individual responses can vary based on diet, training status, and overall health.

Who should be cautious with AAKG?

People who are pregnant or breastfeeding, have cardiovascular conditions, or use blood pressure or nitrate-related medications should consult a clinician before use. Stop use and seek medical advice if you experience concerning symptoms.

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L-Arginine
Alpha-Ketoglutarate

Limited research available·3/10

A higher score indicates better study conditions, but not necessarily effectiveness.

A supplement combining L-arginine and alpha-ketoglutarate, commonly used to support exercise performance and blood flow.

Exercise Recovery Cardiovascular Support Exercise Performance

dose range

3–6 g

Once daily pre-workout, or divided into two to three doses if using higher amounts

Consumption

Take on an empty stomach 30–60 minutes before exercise for potential performance effects.

Not fat-soluble.

Best time

Higher dosages (up to 12g) should be used only under clinical supervision.

Description

L-Arginine Alpha-Ketoglutarate (AAKG) is a combination of the amino acid L-arginine and alpha-ketoglutarate, often marketed for its potential impact on nitric oxide production, exercise performance, and recovery.

benefits

Main effects with level of evidence

Limited

Note on evidence

Some small human trials suggest benefits for exercise performance and vascular function, but larger, long-term studies are lacking.

May improve short-term high-intensity exercise performance

Limited

AAKG supplementation has shown potential to enhance anaerobic exercise performance and muscle strength, likely by boosting nitric oxide availability and promoting blood flow.

Particularly relevant for: athletes · strength trainers

2 · PubMed (Campbell et al., 2012)

May enhance blood flow and vascular function

Limited

As a nitric oxide precursor, AAKG may promote vasodilation, which could improve recovery and muscle oxygenation during and after exercise.

Particularly relevant for: athletes · people with circulation concerns

3 · PubMed (Alvares et al., 2011)

Supports ammonia detoxification and may aid recovery

Limited

Alpha-ketoglutarate plays a role in the urea cycle, potentially reducing ammonia buildup after intense exercise and supporting recovery in metabolic stress.

Particularly relevant for: athletes · recovering patients

4 · PubMed (Papadia et al., 2005)

Safety & Information

Important safety information & known risks

For educational purposes only • not medical advice

Generally well tolerated for short-term use at recommended doses, but risks exist for specific groups.

warning notices

Most common side effects are gastrointestinal discomfort (nausea, diarrhea) and headache.
Risk of low blood pressure when combined with nitrates.
Potential to trigger herpes outbreaks in susceptible individuals.
Not recommended for people with kidney disease, or during pregnancy or breastfeeding.
Avoid use if you have herpes or a history of herpes outbreaks, as L-arginine may trigger reactivation.
Do not use if you have kidney disease due to potential for impaired metabolism and increased risk of adverse effects.
Do not combine with nitrate medications (for heart conditions or chest pain) because of risk of dangerously low blood pressure.
Not recommended for pregnant or breastfeeding women due to lack of safety data.

Known interactions with medications

Nitrate-containing medications (risk of hypotension)

Contraindications / special precautions

Kidney disease
Active herpes infection
Pregnant or breastfeeding women

interactions

Important interactions between active ingredient ↔ supplement / medication / food

AAKG may interact with certain medications and conditions due to its impact on nitric oxide production and amino acid metabolism.

Avoid use with nitrate medications for heart disease or chest pain.

drug · Nitrate medications

AvoidLimited

Why

Both can lower blood pressure; combined use may cause dangerously low blood pressure.

recommendation

Do not use AAKG if taking nitrate-containing medications.

1 · WebMD

Avoid use if you have a history of herpes infections.

lifestyle · Herpes infection

AvoidLimited

Why

L-arginine can facilitate replication of herpes viruses, increasing risk of outbreaks.

recommendation

Avoid AAKG if you are prone to herpes simplex outbreaks.

1 · WebMD

mechanisms of action

Brief explanations of how it works

Nitric oxide production and vasodilation

L-arginine in AAKG serves as a precursor to nitric oxide, a compound that promotes blood vessel relaxation and increased blood flow, potentially enhancing oxygen and nutrient delivery to muscles during exercise.

2 · PubMed (Campbell et al., 2012)3 · PubMed (Alvares et al., 2011)