L-Citrulline / Citrulline Malate
Performance
Also known as: L-Citrulline, Citrulline malate
A
Grade A💊 6-8g L-citrulline or 8-10g citrulline malate🎯 4 primary uses🔗 2 synergies⚠️ Review warnings
Levels upFitness+50 pts
Overview
Converts to arginine, boosting nitric oxide. Enhances blood flow and reduces fatigue.
Primary Uses
PumpEnduranceBlood flowFatigue reduction
Frequently Asked About L-Citrulline / Citrulline Malate
How much L-Citrulline / Citrulline Malate should I take?
The typical effective range is 6-8 g L-citrulline OR 8 g citrulline malate. Individual needs vary based on age, body weight, diet, and goals — start at the lower end and adjust based on response. Always consult a healthcare provider before starting a new supplement.
When is the best time to take L-Citrulline / Citrulline Malate?
30-60 min pre-workout. Consistency matters more than perfect timing — pick a daily anchor (e.g. with breakfast or before bed) and stick with it.
Should I take L-Citrulline / Citrulline Malate with food?
Either.
Does L-Citrulline / Citrulline Malate interact with medications?
Yes — known interactions include Blood pressure meds (may enhance) and Viagra/Cialis (nitric oxide). If you take any prescription medication, talk to your doctor or pharmacist before starting L-Citrulline / Citrulline Malate.
What does L-Citrulline / Citrulline Malate pair well with?
L-Citrulline / Citrulline Malate stacks well with Beta-alanine and Beetroot — these combinations either improve absorption or work synergistically toward common goals.
Who should not take L-Citrulline / Citrulline Malate?
L-Citrulline / Citrulline Malate should be avoided or used with caution by people with None known. Pregnant or breastfeeding women should consult a healthcare provider before use.
What are the side effects of L-Citrulline / Citrulline Malate?
Most people tolerate L-Citrulline / Citrulline Malate well. The most commonly reported side effects are GI upset at high doses. Side effects are usually dose-dependent — lowering the dose often resolves them.
Dosage
Typical range
6-8g L-citrulline or 8-10g citrulline malate
Timing
30-60 min pre-workout
With food
Either
Dose Tiers
Moderate
3-6 g pre-workout
Optimal
6-8 g L-citrulline OR 8 g citrulline malate
Therapeutic
8 g citrulline malate
Upper Limit
No established UL
Duration
Acute effects, daily dosing beneficial
Special Populations
Athletes, cardiovascular support
Research & Studies
Search the literature now
We haven’t curated landmark studies for L-Citrulline / Citrulline Malateyet — one-click into the primary literature here. PubMed (RCTs) is usually the highest-signal starting point.
Search L-Citrulline / Citrulline Malate research
Mechanism of Action
- • Converts to arginine (better than direct arginine)
- • Increases nitric oxide
- • Reduces lactate and ammonia
Evidence Quality
Evidence Grade A
Well-established for performance
Safety & Contraindications
Serious Warnings
- • None significant
Contraindications
- • None known
Common Side Effects
- • GI upset at high doses
Pregnancy & Breastfeeding
Insufficient data
Liver & Kidney Notes
No concerns
Interactions
💊 Medications
- • Blood pressure meds (may enhance)
- • Viagra/Cialis (nitric oxide)
🧪 Supplements
- • Arginine (same pathway)
🍽️ Food & Alcohol
- • Watermelon is food source
Stacking & Synergies
Buying Guide
What to Look For
- • Pure L-citrulline or 2:1 malate
Standardization Markers
L-Citrulline vs malate ratio
Adulteration risk
Low
Practical Notes
- • Better than arginine orally
- • 6-8g for effects
Tags
performancenitric oxidepumpblood flow
Top Products with L-Citrulline / Citrulline Malate
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Related Guides
In-depth guides covering L-Citrulline / Citrulline Malate — protocols, comparisons, and use cases.
More in Performance
Other ingredients in the Performance category.
Agmatine Sulfate
Arginine metabolite with nitric oxide and pain-modulating effects. Enhances pumps.
Arachidonic Acid (ARA)
Omega-6 fatty acid that amplifies exercise-induced muscle signaling. Increases training response but also inflammation.
BCAAs
A branched-chain amino acid blend in a 2:1:1 leucine-to-isoleucine-to-valine ratio, formulated in instantized (micronized) form for improved solubility. BCAAs support muscle protein synthesis and may reduce exercise-induced fatigue, though whole protein sources provide comparable benefits at lower cost.
Beetroot / Nitrates
Dietary nitrates converted to nitric oxide for improved endurance and blood flow. Can enhance exercise efficiency.
Beta-Alanine
Increases muscle carnosine for buffering acid during high-intensity exercise. Delays fatigue in 1-4 minute efforts.
Beta-Hydroxybutyrate (BHB)
Exogenous ketone body that can elevate blood ketone levels. Used for energy, cognitive function, and supporting ketogenic diets.
Last reviewed: September 2026 by the Formulate Research Team. Sources cited above; methodology and scoring criteria published here.
Cite this page
Formulate Research Team. (2026, September). L-Citrulline / Citrulline Malate — Evidence-Based Supplement Guide. Formulate Supplement Encyclopedia. https://app.formulate-health.app/learning/supplements/citrulline
Educational content based on published research and our scoring methodology. Not medical advice — consult a qualified healthcare provider before starting, stopping, or changing supplements, especially if you take medications, are pregnant, or have a medical condition.