USN L-Citrulline Malate

USN Pure L-Citrulline Malate 300g — Unflavoured, Dose It Yourself

Citrulline malate is the pump ingredient, and buying it unflavoured means you control the dose rather than accepting whatever a pre-workout decided to include. Supports nitric oxide production, blood flow, muscle pumps and endurance. Mixes into anything without affecting taste. 300g. In stock at TopDog Nutrition.

How It Works

Citrulline is converted to arginine in the kidneys, and arginine is the direct precursor to nitric oxide. Nitric oxide relaxes the smooth muscle in blood vessel walls, widening them and increasing blood flow.

More blood flow means more oxygen and nutrients delivered to working muscle, and faster clearance of the metabolic waste that builds up as you fatigue. That's the pump, and it's also why citrulline supports work capacity rather than just appearance.

The obvious question is why not simply take arginine. The answer is that oral arginine is largely broken down in the gut before it reaches circulation. Citrulline bypasses that entirely: it's absorbed intact and converted where it counts, which is why supplementing citrulline raises plasma arginine more effectively than supplementing arginine does.

The malate half contributes too. Malic acid is a Krebs cycle intermediate, supporting aerobic energy production and helping clear ammonia during high-volume work.

Why Buying It Unflavoured Makes Sense

Most pre-workouts include citrulline, and most underdose it. Research on pump and performance generally uses 6–8g of citrulline malate. Plenty of commercial formulas run 1–2g and list it on the label anyway.

Buying the raw ingredient means you set the dose. You can top up a pre-workout you otherwise like, add pump support to a stimulant-free session, or build your own stack alongside creatine at a fraction of the cost of a branded formula.

It also mixes into pre-workouts, hydration products, amino drinks or protein shakes without affecting taste.

One Thing to Know About the Taste

Pure citrulline malate is tart and noticeably sour, which is the malic acid. Mixed into a flavoured drink it disappears. On its own in plain water it's distinctly sharp, so most people prefer to add it to something.

Who It Suits

Physique and strength athletes chasing pumps and training volume, endurance athletes using it for blood flow and ammonia clearance, and anyone who builds their own stack from raw ingredients rather than buying pre-made formulas.

Directions

Add to your pre-workout or intra-workout drink, or mix with water 20–30 minutes before training. Start around 3–4g and scale toward 6–8g if pump and endurance are your priority.

Stimulant-free, so there's no timing restriction and nothing to clash with. It's a good option for evening training when you don't want caffeine.

Frequently Asked Questions

How much should I take?

The research generally uses 6–8g of citrulline malate. Starting at 3–4g and building up is sensible if you're new to it.

Citrulline malate or pure L-citrulline?

Citrulline malate is citrulline bound to malic acid, so roughly 55–65% of the weight is citrulline, with the malate contributing to aerobic energy production. Pure L-citrulline is all citrulline but without the malate benefit. Both work; malate is the more common research form.

Will it work without caffeine?

Yes. The pump mechanism is entirely independent of stimulants.

Can I take it every day?

Yes. No stimulants, no tolerance, no cycling needed.

How many serves in 300g?

Depends on your dose. At 6g that's 50 serves; at 4g, 75.