15XP
May reduce next-day soreness slightly; performance gains in reviews are small and uncertain.
Citrulline
An amino acid found in watermelon and naturally synthesized by the body during the urea cycle
Often taken withCreatine, Beta-Alanine, Caffeine, Cold Exposure
Evidence-backed benefits
How Citrulline can help, goal by goal, with the studies behind each score.
12XP
May lower blood pressure a little, mostly in small trials of people with raised readings.
How to read XP
Each score is for this supplement and that specific goal, not a general rating.
XP combines how reliable the research is with how much difference it usually makes. Higher means stronger evidence for that supplement and that goal.
Limited<15 XPModest15–27 XPModerate28–44 XPReliable45–69 XPHigh70+ XP
Dosage
What studies commonly use for Citrulline, and how it is usually taken.
Usual dose
3–6 g per day
3–6 g/day of L-Citrulline (or 6–8 g/day Citrulline Malate 2:1)
How to take it
- 30–60 min before activity
See study range
3–6 g/day (L-citrulline) or 6–8 g/day (citrulline malate)
Your journey
Muscle Recovery comes first (same day → day 2); Blood Pressure & Circulation takes longest (week 4 → week 8). An estimate from the studies' timelines, not a promise: everyone responds differently.
From the first noticeable effect to roughly full strength. Colour follows the XP tier of each benefit.
Make it a habit
These gains come from steady use, not a single dose. Keep Citrulline in your routine for about week 8 before you judge it.
Safety
What to know before you take Citrulline.
Safety rating
Well tolerated
Mild effects, if any.
No notable side effects at normal doses.
Check with a doctor first if you take nitrates or erectile dysfunction pills.
General information, not medical advice. If you are pregnant, take medication or have a health condition, check with a doctor or pharmacist first.
Common pairings
Supplements and habits often combined with Citrulline.
Creatine
Often taken together around training
Beta-Alanine
A staple of pre-workout formulas
Caffeine
Commonly combined in pre-workouts
Cold Exposure
Pairs with cold dips for recovery.
Where to buy
Brands we looked at for Citrulline, with our quality score for each.
No listings for this country yet.
Authority
Public figures who take or recommend Citrulline. Portraits are AI-generated, not real photos, and this is not an endorsement.
Chris Bumstead
Bodybuilder
PractisesSource
Andy Galpin
Scientist
PractisesSourceBuild a stack around your goals.
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