Pre-workout supplements have become a go-to for gym-goers looking to maximize their training. Among the key ingredients, L-Citrulline stands out as an amino acid that can significantly improve your workout when used in the right amount. Unfortunately, many products skimp on dosage, leaving you short of the benefits. Let’s break down how L-Citrulline works and why proper dosing matters.
Today’s pre-workouts are more advanced than ever, moving beyond basic caffeine to offer well-researched formulas with clear ingredient lists. Users want energy and performance support without crashes or hidden blends. L-Citrulline has emerged as a top choice for enhancing blood flow, endurance, and that satisfying muscle pump.

What Is L-Citrulline and How Does It Help Workouts?
L-Citrulline, a natural amino acid, supports nitric oxide production and plays a vital role in blood flow. Unlike stimulants that give a quick jolt, it improves oxygen and nutrient delivery to muscles for better performance and endurance.
Once taken, L-Citrulline converts to L-Arginine in the body, boosting nitric oxide levels more effectively than L-Arginine alone due to better absorption. This is why many athletes and brands prefer it for enhancing circulation.
How It Improves Performance
L-Citrulline primarily works by increasing nitric oxide, which widens blood vessels. This allows more blood, oxygen, and nutrients to reach muscles while clearing out waste like lactate during exercise.
How Much L-Citrulline Do You Need for Results?
Dosage determines whether L-Citrulline works for you. Many supplements include small amounts that sound good on a label but don’t deliver real effects. Knowing the right range is key to getting value from your pre-workout.
Pure L-Citrulline vs. Citrulline Malate
There are two common forms of this ingredient. Pure L-Citrulline is just the amino acid, while Citrulline Malate pairs it with malic acid. Effective doses are 3 to 5 grams daily for pure L-Citrulline and 6 to 8 grams for Citrulline Malate.
Citrulline Malate often has a 2:1 ratio, meaning roughly two-thirds is L-Citrulline. That’s why you need a higher amount compared to the pure form. However, inconsistent labeling in some products makes it hard to know the exact breakdown, so transparency matters when choosing a supplement.
Why Dosage Matters
Many products contain just 1 or 2 grams of L-Citrulline, far below what’s needed for benefits. This tactic, often called “pixie dusting,” lets companies list popular ingredients without the cost of effective amounts.
Bucked Up tackles this by using science-backed amounts. Their Mother Bucker pre-workout, for instance, includes 4 grams of pure L-Citrulline plus Nitrosigine for enhanced blood flow effects.
Form |
Effective Dose |
Timing |
Main Benefits |
Pure L-Citrulline |
3-5g |
30-45 min pre-workout |
Blood flow, endurance, pump |
Citrulline Malate (2:1) |
6-8g |
30-45 min pre-workout |
Pump, endurance, energy support |
Under-dosed Products |
1-2g |
Limited impact |
Minimal to no benefit |

How L-Citrulline Supports Pump and Power
L-Citrulline offers more than just a visible muscle pump. While the fuller, vascular look is a bonus, the real advantage comes from better circulation and energy efficiency during workouts.
Better Blood Flow for Muscle Pump
Higher nitric oxide levels from L-Citrulline widen blood vessels, enhancing pump and workout capacity. This isn’t just for show; it brings practical gains.
Improved blood flow means more oxygen reaches muscles for energy. It also supplies nutrients like glucose for fuel and clears waste to delay fatigue. You’ll feel stronger and more capable through each set.
Boosted Endurance and Less Fatigue
You might notice you can do extra reps or keep intensity up during cardio. Plus, it lowers blood pressure and boosts exercise tolerance more effectively than L-Arginine, aiding overall training capacity.
Strength and Recovery Support
L-Citrulline helps strength by improving energy recovery between sets, so you maintain power longer. It may also support muscle growth by triggering key pathways for repair.
Better circulation speeds up nutrient delivery for recovery and reduces soreness. Many users feel ready to train again sooner with consistent use.
Why Bucked Up Stands Out with L-Citrulline Dosing
Bucked Up focuses on clear labeling and research-supported doses of L-Citrulline. While other brands use low amounts or hide behind blends, Bucked Up ensures you get what works.
Their standard Bucked Up pre-workout includes Citrulline Malate at levels suited for beginners seeking pump and stamina. For seasoned athletes, Mother Bucker combines 4 grams of pure L-Citrulline with Nitrosigine for amplified results.
Bucked Up also adds Astragin to improve ingredient absorption, ensuring the doses deliver full effects. This focus on details sets their formulas apart.

Product |
L-Citrulline Content |
Target User |
Key Benefits |
Bucked Up |
Citrulline Malate (2:1) |
Beginners |
Basic pump and endurance |
Woke AF |
Citrulline Malate (2:1) |
Intermediate |
Pump with added focus |
Mother Bucker |
4g L-Citrulline + Nitrosigine® |
Advanced |
Peak pump and performance |
Tips to Maximize L-Citrulline Benefits
Getting the best from L-Citrulline goes beyond dosage. Timing, supporting habits, and complementary ingredients all help you see stronger results.
Timing and Regular Use
Take L-Citrulline 30 to 45 minutes before training for peak effects. This gives it time to boost nitric oxide levels when you need them most.
Consistent use can enhance benefits over time. Regular supplementation supports long-term cardiovascular health and workout gains. Some users cycle off briefly to maintain effectiveness, though.
Pairing with Other Ingredients
L-Citrulline pairs well with other performance boosters. Combining it with glutathione can extend nitric oxide benefits through antioxidant support.
Bucked Up formulas often include Nitrosigine for quick blood flow support and beta-alanine for endurance, enhancing L-Citrulline’s impact. Astragin further boosts absorption for better results.
Stay Hydrated for Full Effects
Hydration is critical with L-Citrulline. Wider blood vessels need adequate fluid to work fully, so drink plenty before and during workouts. Bucked Up includes Himalayan Rock Salt in many products to support electrolyte balance.
Common Questions About L-Citrulline Use
What’s the Difference Between L-Citrulline and Citrulline Malate?
Pure L-Citrulline is the amino acid alone, effective at 3 to 5 grams. Citrulline Malate, often a 2:1 mix with malic acid, needs 6 to 8 grams. Both work well if dosed right, with Malate possibly adding slight energy benefits. Pick based on your needs and product clarity.
How Soon Do L-Citrulline Effects Kick In?
You’ll typically notice effects 30 to 45 minutes after taking it, with peak impact at 60 to 90 minutes. Benefits like pump and endurance can last 3 to 6 hours, depending on the dose and your body.
Is Daily Use of L-Citrulline Okay?
Yes, daily use is fine for many and can build benefits over time. Some prefer cycling, like 8 weeks on and 2 off, to keep effects strong. Adjust based on how you feel.
Does L-Citrulline Work Without Caffeine?
Definitely. It operates on different pathways than stimulants, offering pump and endurance benefits without any buzz. It’s great for caffeine-sensitive folks or evening workouts.
Are There Side Effects or Limits to L-Citrulline?
It’s safe at recommended doses of 3 to 5 grams for pure form or 6 to 8 grams for Malate. Over 10 grams might cause stomach upset. Start low if new to it, and take with food if needed to ease digestion.
Wrap-Up: Upgrade Workouts with Proper L-Citrulline Dosing
L-Citrulline is a proven ingredient for better pump, stamina, and recovery, but only at the right dose. Many products fall short, so knowing effective amounts, 3 to 5 grams pure or 6 to 8 grams Malate, helps you choose wisely.
Bucked Up commits to doses that match research, from their basic formula to advanced options like Mother Bucker with added boosters. This ensures real impact on your training.