Citrulline and nitric oxide metabolism
Exercise physiology reviews describe L-citrulline as an arginine precursor that supports more sustained nitric oxide production than L-arginine supplementation alone.
About this product
OxyFlow™ is a nitric oxide support formula designed to promote healthy circulation, oxygen delivery, and workout performance.
Suggested use
About monthlees
The supplement industry is built on inflated pricing, confusing labels, and aggressive marketing.
Monthlees exists to fix that.
We believe:
- Supplements should be clinically dosed
- Pricing should be transparent
- Testing should be independent
- And customers shouldn't pay for influencer commissions or retail margins
Instead of hiding costs inside the product price, we use a simple membership model — so you pay what supplements actually cost to make.
Shipping & returns
• Shipping: Orders are processed within 1–2 business days. Standard delivery takes 3–7 business days depending on your location.
• Returns: You may return or exchange products within 30 days of receiving your order. Items must be in original condition with proof of purchase.
If your item is defective or damaged due to manufacturing issues, we’ll gladly replace it at no additional cost.
30 Day Money Back Guarantee
FDA Disclaimer
What's in Oxyflow™?
- 400 mg L-citrulline DL-malate
- 350 mg L-arginine HCl
- 50 mg L-arginine AAKG
- Nitric oxide precursor stack
- 2 capsules per serving
- 30 servings per bottle
Supplement Facts
Oxyflow™
Supplement Facts
Serving Size 2 Capsules
Servings Per Container 30
Amount Per Serving
% DV
L-Citrulline DL-Malate
400 mg
†
L-Arginine Hydrochloride
350 mg
†
L-Arginine Alpha-Ketoglutarate
50 mg
†
Other Ingredients: Cellulose (vegetable capsule), brown rice flour.
Free of
- Stimulant pre-workouts
- Proprietary pump blends
- Undisclosed amino doses
Diet friendly
- 400 mg citrulline malate
- Dual-form L-arginine
- Non-stimulant NO support
- Vegetable capsules
Fuel your blood flow.
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Nitric oxide support
L-arginine and L-citrulline contribute to nitric oxide production pathways — 400 mg citrulline malate and 400 mg total arginine forms per serving on the label.*
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Circulation support
Supports healthy blood flow and vascular dilation during exercise — nitric oxide's central role in nutrient delivery to working muscles.*
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Workout performance
Designed to complement endurance and training intensity — non-stimulant pump and performance support for resistance and cardio sessions.*
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Fully disclosed aminos
Three amino acids, three doses on the supplement facts panel — no proprietary pre-workout blend or hidden stimulants.*
How it works
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Step 1: Precursor
L-arginine hydrochloride (350 mg) and L-arginine alpha-ketoglutarate (50 mg) provide direct substrates in the nitric oxide synthesis pathway — as listed on the supplement facts panel.*
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Step 2: Sustain
L-citrulline DL-malate (400 mg) supports sustained nitric oxide production — converted to arginine in the body to extend the NO pathway beyond arginine alone.*
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Step 3: Flow
Nitric oxide signals blood vessels to dilate — supporting healthy circulation, nutrient delivery to working muscles, and exercise performance during physical activity.*
Supplement facts
Nitric oxide precursors — circulation and blood flow support.
L-Citrulline DL-Malate
—
400 mg
†
† Daily Value not established.
L-Arginine Hydrochloride
—
350 mg
†
L-Arginine Alpha-Ketoglutarate
—
50 mg
†
† Daily Value not established.
Evidence-based ingredients
The science behind the ingredients
Oxyflow™ discloses 400 mg citrulline malate and dual-form L-arginine on every label — not a mystery pump blend. Explore the research on nitric oxide, circulation, and exercise performance.*
400 mg
Citrulline malate
400 mg
Total arginine forms
30
Servings per bottle
Citrulline malate and exercise performance
Controlled trials report that citrulline malate supplementation may reduce fatigue and support performance during high-repetition resistance exercise.
Arginine and nitric oxide synthesis
Biochemistry reviews describe L-arginine as the direct substrate for endothelial nitric oxide synthase — the enzymatic pathway underlying vascular dilation and blood flow support.
Nitric oxide and exercise hemodynamics
Sports medicine reviews discuss nitric oxide's role in vasodilation, muscle perfusion, and oxygen delivery during physical activity — the mechanistic basis for NO precursor supplementation.
Compare nitric oxide supplements
How Monthlees Oxyflow™ stacks up
Many NO products hide behind stimulant pre-workouts or proprietary pump blends. Oxyflow™ delivers L-citrulline and dual-form L-arginine with every dose on the label.
Typical arginine cap |
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|---|---|---|
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Citrulline malate disclosed
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400 mg on label
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Often omitted
|
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Dual-form arginine
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HCl + AAKG disclosed
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Often single form only
|
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Non-stimulant formula
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Amino NO stack only
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Often caffeine blend
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Member pricing available
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Yes — Monthlees members
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No
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Insider access to the world's best labs & supplement manufacturers.
Membership allows us to sell products for a fraction of the typical industry retail price. Think of it as an insider access pass to the warehouses of the supplement industry.
Monthlees members don't pay for:
- Middlemen
- Marketing & influencer costs
- Retailer markups
- Distributor margins
Stop overpaying for stimulant pump pre-workouts.
Retail NO and pre-workout products often cost $40–$60 for stimulant-heavy blends with vague amino dosing. Monthlees membership keeps disclosed citrulline and arginine support affordable.
| Treatment | Other guys | Monthlees |
|---|---|---|
| Oxyflow™ monthly supply 30 servings — 2 capsules daily | $44.95 | $23.37 |
| Typical NO pre-workout Retail 30-serving tub | $40–$60/mo | Non-stimulant aminos |
| Separate citrulline + arginine Two-bottle retail stack | $35–$55/mo | One NO formula |
Start your monthlees health journey with complete support
Your membership gives you access to better pricing, personalized guidance, and everything you need to build a healthy supplement & personal care routine that effortlessly fits your life.
- Unlock member pricing of 50-80% off on every product
- Get your personalized Starter Routine Kit
- Use flexible subscriptions to save on repeat orders
- Manage everything easily from your Monthlees account
- 30-day money back guarantee on all product purchases
- Automatic savings applied at checkout
- 100% flexible. Update, pause, or cancel anytime
Member trust
Confidence built into every order
From clear member pricing to flexible subscriptions and responsible product standards, Monthlees is built to help you shop with confidence — without inflated markups, hidden tiers, or checkout surprises.
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Transparent product pricing
Every product shows clear pricing for guests and members, so you can compare your savings before you buy.
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Member savings applied automatically
When you’re signed in as a member, your eligible discounts are applied automatically at checkout.
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Subscriptions that stay flexible. Cancel anytime.
Start, pause, skip, or adjust product subscriptions from your account — without hidden hoops or confusing rules.
Frequently asked questions
Everything you need to know about Monthlees member pricing, subscriptions, and how checkout works.
Why combine citrulline and arginine?
L-arginine is a direct nitric oxide precursor, while L-citrulline DL-malate (400 mg) is converted to arginine in the body to support more sustained nitric oxide production. Oxyflow™ delivers both plus 50 mg L-arginine alpha-ketoglutarate — all three doses listed on the supplement facts panel.
When should I take Oxyflow™?
Take 2 capsules with water. Many athletes take Oxyflow™ 30–60 minutes before training for nitric oxide support during exercise. One bottle provides 30 servings at the suggested use on the label.
How is Oxyflow™ different from Beetroot Capsules?
They support nitric oxide through different pathways. Oxyflow™ delivers L-citrulline and L-arginine amino acids directly involved in NO synthesis. Beetroot Capsules provide dietary nitrates from organic beetroot powder that the body converts to nitric oxide. Many athletes choose based on preference — compare supplement facts panels on each product page.
Why I created monthlees...
When I was 19 years old, I was diagnosed with a brain tumor. That experience forced me to start asking deeper questions about how the human body actually works.
Over the next 18 months, I immersed myself in studying health, nutrition, and neuroscience — eventually earning my degree in Neuroscience from Duke University. Along the way, I discovered something powerful: the body is incredibly resilient & inherently self-healing when it’s given the right support.
Strategic nutrition and supplementation became a major part of my own health journey. And over the last two decades, I’ve devoted my life to helping millions of people around the world take a more proactive role in their health.
That experience completely changed how I thought about health — and ultimately shaped the way Monthlees was built.
I created Monthlees because I was tired of seeing people pay premium prices for supplements that were under-dosed, over-marketed, and difficult to trust.
My goal is simple: build the kind of brand I would want for myself and my family — with better ingredients, transparent formulas, meaningful dosages, and a business model built on long-term trust.
— Chris Walker, Founder of Monthlees
