Ingredient
L-Citrulline
What is L-Citrulline?
L-Citrulline is a non-essential amino acid that is produced naturally by the body and can also be found in foods like watermelon. It is often synthesized for dietary supplements through a fermentation process involving plant sources.
L-Citrulline is commonly used to enhance exercise performance, reduce muscle soreness, and improve heart health. The evidence is mixed; some studies indicate benefits for extended exercise capacity and increased blood flow, while others demonstrate minimal effect.
When you see L-Citrulline on a label, it is likely included for its potential to boost nitric oxide production and promote blood vessel dilation, which may enhance athletic performance and recovery.
Commonly found in: dietary supplements, energy drinks, pre-workout formulas, sports nutrition products
Benefits
- May increase exercise capacity by improving blood flow and oxygen delivery to muscles.
- Could help reduce muscle soreness after intense activity.
- Potentially beneficial for certain heart health parameters.
L-Citrulline is available as a dietary supplement in the US and is not subject to specific restrictions.
Research shows mixed findings on its efficacy for exercise performance; more studies are needed.
L-Citrulline is typically synthesized from plant sources and considered vegan-friendly.
Sources: L-Citrulline Information
Scout's take
L-Citrulline is a premium amino acid that supports nitric oxide production, improving blood flow, oxygen delivery, and exercise performance. At 4g per serving, this is a clinically effective dose. It is naturally found in watermelon and is well-tolerated with no significant side effects.
The case for
Maximizes blood flow, reduces muscle fatigue, and significantly improves exercise performance through nitric oxide production.
from the analysis of Santa Cruz Paleo Pre Workout Powder · echoed in 1 other analysisMore from Scout's analyses
L-Citrulline is a premium amino acid that drives nitric oxide production for enhanced blood flow, oxygen delivery, and exercise performance. At 6g per serving, this exceeds the clinical dose of 3-6g, making it one of the most generously dosed citrulline servings on the market.
from the analysis of Santa Cruz Paleo Pre Workout Powder6g is a full clinical dose of pure L-Citrulline for maximum nitric oxide production, blood flow, and muscular pumps during training.
from the analysis of Alpha Lion SuperHuman Core Pre-WorkoutBeneficial ingredient — whole-food or functional value in this product class.
from the analysis of Optimum Nutrition Gold Standard Pre-Workout Fruit PunchFound in 5 products
Scan any product to see every ingredient explained — and healthier swaps.
Download on theApp Store GET IT ONGoogle Play