Citrulline alpha-ketoglutarate
Evidence: LimitedUseful mainly for trainees wanting modest support for exercise performance and reduced muscle soreness.
Quick decision guide
May help most
Trainees wanting modest support for exercise performance and reduced muscle soreness
Common dosing range
3,000–6,000 mg before training; ~6,000 mg common
When to expect effects
Acute (single dose) for performance; days for soreness patterns
Watch out for
Most evidence is for citrulline (often as citrulline malate), not the AKG salt specifically
What is it
Citrulline alpha-ketoglutarate (Cit-AKG) pairs the amino acid L-citrulline with the Krebs-cycle metabolite alpha-ketoglutarate. It is sold as a pre-workout ingredient on the basis that citrulline raises arginine and nitric-oxide availability; the citrulline component carries the evidence, while the AKG pairing is largely a delivery rationale.
Is it worth it for you?
Use this as a quick fit check, not a diagnosis.
Worth considering if…
Probably skip if…
Evidence at a glance
| Goal | Evidence | Effect | Best fit | Time |
|---|---|---|---|---|
| exercise performance and muscle soreness | Limited Evidence | Small — a few extra reps; modest soreness reduction | Resistance- and high-intensity-trained adults | Acute for performance; days for soreness |
Evidence for 1 use
AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.
exercise performance and muscle soreness
Supplement benefitL-citrulline, most often studied as citrulline malate, has been shown in multiple trials to modestly increase training volume and reduce post-exercise muscle soreness, via raised arginine and nitric-oxide availability. The benefit is real but small, and most data come from citrulline rather than the alpha-ketoglutarate salt specifically, so the AKG pairing adds uncertainty.
Bottom line: Expect a modest performance and soreness benefit driven by the citrulline content.
Evidence is mixed
Trials are mixed in magnitude and some show no significant effect; benefits are inconsistent and at best modest.
How to take it
- Typical dose
- 3,000–6,000 mg taken before exercise
- Timing
- About 30–60 minutes pre-workout
- With food
- Either; an empty stomach may speed absorption
- How long to try
- Useful acutely; assess soreness benefit over 1–2 weeks of training
What to track
- Reps to fatigue or training volume
- Post-workout muscle soreness
- Perceived effort
Safety
Common side effects
Generally well tolerated, Occasional mild GI upset at higher doses
Who should avoid it
- People on nitrates or PDE5 inhibitors without medical advice
Pregnancy & breastfeeding
No safety data for supplemental doses; avoid unless advised by a clinician.
Interactions
Additive nitric-oxide/vasodilatory effect could lower blood pressure
Possible additive blood-pressure lowering
Choosing a product
Look for
- States grams of citrulline per serving
- Third-party tested; discloses citrulline vs AKG ratio
Be skeptical of
- “Massive pumps”
- “Dramatic strength gains”
- Claims the AKG form is clinically superior to citrulline
References by claim
Track Citrulline alpha-ketoglutarate with Pilora
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Coming to App StoreDisclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.