L-Citrulline: What It Is, Benefits, Dosage, and More
What is L-Citrulline?
L-Citrulline is a naturally occurring amino acid found in foods like watermelon. Unlike other amino acids, it isn’t used directly to build muscle, but instead helps your body produce nitric oxide — a compound that relaxes blood vessels and improves blood flow. It’s commonly found in pre-workout supplements and is known for its role in enhancing exercise performance.
What Does It Do?
L-Citrulline is popular among athletes and gym-goers for several key benefits:
- Improves blood flow and pumps: By boosting nitric oxide levels, L-Citrulline helps deliver more oxygen and nutrients to muscles.
- Delays fatigue: It can help reduce the buildup of ammonia and lactic acid, which contributes to better endurance during intense workouts.
- Boosts performance: Studies show it can improve high-intensity exercise performance, especially in activities involving repeated bouts like weightlifting or sprints.
Effective Dose
The effective dose depends on the form:
- L-Citrulline (pure form): 3 to 6 grams taken about 30–60 minutes before a workout.
- Citrulline Malate (often 2:1 ratio of citrulline to malic acid): 6 to 8 grams taken about an hour before exercise.
It’s best taken on an empty stomach for maximum absorption, and it’s commonly found in pre-workout blends.
Any Side Effects?
L-Citrulline is generally very well-tolerated. At recommended doses, side effects are rare. Some users might experience mild stomach discomfort if taken in very high doses, but this is uncommon.
Who Should Use It?
- Weightlifters looking for better pumps and reduced fatigue.
- Endurance athletes (like cyclists or runners) who want improved stamina.
- Anyone using a pre-workout looking for a science-backed ingredient for better performance.
Stack Suggestions
L-Citrulline stacks well with:
- Beta-Alanine – for muscular endurance
- Creatine Monohydrate – for strength and power
- Caffeine – for mental focus and energy
- Nitrates – for additional nitric oxide support
