L-Citrulline & L-Arginine Supplement - Blood Flow Support for Mental Output - 400mg Citrulline & 400mg Arginine Per Serving Capsules - 30 Servings

You already run a shelf of things that work, and you want this pathway covered by something you can account for line by line.

The usual answer is a single amino acid behind a big number. Arginine on its own leaves out the route your body finds easiest, and citrulline on its own leaves out the arginine that is ready to use the moment it lands. Buy them separately and you are running two bottles and doing the arithmetic yourself.

Here is what each of the three forms is doing:

• L-citrulline DL-malate, 400 mg. The largest single active in the serving. Your kidneys convert it into arginine after absorption, which is a steadier way to raise arginine than swallowing arginine by itself.
• L-arginine hydrochloride, 350 mg. Arginine that is already arginine. It does not have to be converted into anything before it can be used.
• L-arginine alpha-ketoglutarate, 50 mg. The same amino acid bound to alpha-ketoglutarate, a second version of the same building block sitting beside the first.
• Two other ingredients, and that is the whole bottle. The capsule shell and the filler inside it, which means there is nothing extra in here to work around.

CORTEX L-Citrulline & L-Arginine Stack gives you 400 mg of citrulline malate and 400 mg of arginine across the two forms, which is 800 mg of actives in every serving. Two capsules daily with 6 to 8 oz of water, and what you get for it:

• One slot on the shelf, all three routes covered. You are not buying citrulline and arginine separately and working out how to run them beside each other.
• Nothing that collides with the rest of your routine. There is no caffeine here, no creatine and no beta-alanine, so nothing in the bottle is already arriving from somewhere else.
• Support that holds up mentally as well as physically. Circulation sits underneath both, and neither one is left taking the leftovers.

Here is the honest picture of what this adds, and how quickly.

🧩 It fills a gap rather than adding a layer

Two capsules cover the nitric oxide pathway and nothing else. Everything else you run keeps doing its own job, and nothing on the panel here arrives twice.

🩸 The pathway is topped up from day one

Both precursors are in play from the first serving. Nothing flushes, nothing tingles and nothing calls attention to itself, which is exactly what you want from something that has to sit quietly beside everything else.

🧠 The payoff shows up late, not early

This is not something you flip on before a task. It is the supply underneath one, and it shows in the part of the day where you would normally be running on less than you started with.

💧 Two capsules, a full glass, no window to hit

Six to eight ounces of water is what the label asks for. Nothing has to be timed around a meal, around training, or around anything else already in your routine.

📈 Give it a run of weeks before you call it

A nutrient pathway responds to what shows up daily. Hold the rest of your routine steady while you run it and you will have a clean read on what this one is adding.

Three actives, one signal. Here is what each part of that is worth.

• Nitric oxide is a signal, not a stimulant. Its job is to tell a blood vessel to relax so more blood moves through it, which is why what you get is supply rather than speed.
• Arginine is the direct raw material. It is here twice, as the hydrochloride and bound to alpha-ketoglutarate, which puts 400 mg of arginine into every serving across the two forms.
• Citrulline keeps more of it arriving. Swallowed arginine takes a heavy loss on the way in. Citrulline goes past that and converts afterwards, which is why it is the biggest figure on this panel.
• Together they cover the pathway from both ends. A form your body has to convert and two forms it does not, all feeding the same signal on the same day.

How the amounts sit next to each other.

400 mg of citrulline malate, 350 mg of arginine hydrochloride and 50 mg of arginine alpha-ketoglutarate come to 800 mg of actives in a two-capsule serving, with the arginine adding up to 400 mg across its two forms. That is the whole pathway covered by one bottle taken once a day, and it slots in without moving anything else you run.

This was made for people who already run a routine and want the nitric oxide pathway covered by something they can account for.

It's especially for you if:

• You take three or four things a day and know exactly what each of them is for.
• You have priced citrulline and arginine separately and did not want to run two bottles.
• You want the forms named and kept apart instead of folded into a single amino line.
• You care that nothing new on your shelf repeats something already sitting on it.
• You want a capsule you can take at any hour without rearranging the rest of your routine.

400 mg of L-citrulline DL-malate, 350 mg of L-arginine hydrochloride and 50 mg of L-arginine alpha-ketoglutarate per serving, which is 800 mg of actives and 400 mg of total arginine. 60 vegan capsules to a bottle at two a day. Gluten-free, vegetarian, allergen-free, non-GMO and vegan friendly. Made in the USA.

If three of those sounded like you, this is the amino pairing your shelf has been missing.

Your order today is backed by our 90-day guarantee. If CORTEX isn't right for you, return it within 90 days of delivery for a full refund. Simple as that.