Endothelial Nitric Oxide Protocol

60 capsules · 30 servings · 2 capsules daily with water · full label transparency

Why Normal Blood Work Hides Starved Capillaries

Standard L-arginine degrades within sixty minutes, leaving stiff micro-capillaries starved of essential nitric oxide. FLOW-4 pairs fast-acting dual L-arginine with sustained L-citrulline malate for continuous all-day peripheral circulation.

L-Citrulline DL-Malate sustains 24-hour microvascular nitric oxide levels

Dual L-Arginine HCl and AKG ignite immediate endothelial vasodilation

Restores deep microcirculation to cold fingers and heavy legs

Restore My Peripheral Circulation Now

60-Day "Keep The Bottle" Money-Back Guarantee · Free US Shipping

The Hidden Capillary Collapse Standard Checkups Never Detect

After age 45, endothelial nitric oxide production plummets by fifty percent, constricting the microscopic capillary beds that feed your hands, feet, and climbing muscles.

Single-ingredient L-arginine pills break down inside liver enzymes within an hour, creating sudden circulation spikes that rapidly crash and leave extremities freezing cold.

FLOW-4 combines 400 mg L-Citrulline DL-Malate with dual L-Arginine HCl and AKG, providing immediate arterial release backed by sustained all-day endothelial blood flow.

3-Step Microvascular Surge Routine Take two capsules daily with water to ignite continuous microvascular blood flow.

Feed starved peripheral capillaries and warm freezing extremities with sustained endothelial nitric oxide release.

Step 1: Morning Delivery

Swallow two capsules with 8 oz of fresh water before starting your day.

Step 2: Dual-Stage Spark

Dual L-Arginine initiates rapid vasodilation while L-Citrulline recycles into prolonged nitric oxide.

Step 3: Peripheral Warmth

Feel effortless stamina on stairs alongside naturally warm, re-energized hands and feet.

Step 1: Morning Delivery

Swallow two capsules with 8 oz of fresh water before starting your day.

Step 2: Dual-Stage Spark

Dual L-Arginine initiates rapid vasodilation while L-Citrulline recycles into prolonged nitric oxide.

Step 3: Peripheral Warmth

Feel effortless stamina on stairs alongside naturally warm, re-energized hands and feet.

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PrimalVive® FLOW-4

Take two daily capsules to flood constricted micro-capillaries with continuous nitric oxide and warm starved extremities.

60 capsules · 30 servings · 2 capsules daily with water · Free US shipping · 60-day keep-the-bottle guarantee.

60-Day Guarantee

FREE Shipping to USA

60 Full Days to try FLOW-4, or get every penny back

"Most people write off their daily frustration as blaming cold extremities and low stamina on getting out of shape. And when they look for support, they end up buying single-ingredient products that only address one piece of the puzzle. We built FLOW-4 (L-Citrulline Malate + Dual L-Arginine Nitric Oxide Complex) by combining fast-acting L-Arginine HCl (350 mg) and L-Arginine AKG (50 mg) with sustained-release L-Citrulline DL-Malate (400 mg) — with the complete ingredient list printed transparently on the panel."

PrimalVive Formulation Team

Why FLOW-4 combines L-Citrulline DL-Malate with L-Arginine Hydrochloride

FLOW-4

Plain L-Arginine Alone

Fitness Boost

Nitric Oxide helps support healthy circulation and muscle growth, making it a great addition to your fitness routine!

Power of L-Arginine

L-Arginine Alpha-Ketoglutarate promotes normal blood flow and nutrient delivery to muscles, supporting exercise performance.

Dynamic Duo

L-Arginine Hydrochloride and L-Citrulline DL-Malate work together to support endurance and muscle function by helping your body produce nitric oxide.

Easy Wellness

With just 2 capsules a day, Nitric Oxide is a convenient way to support circulation, muscle recovery, and overall wellness!

Routine Step

Directions

Daily Serving

As a dietary supplement adults take two (2) capsules daily. For best results, take with 6-8 oz (177-237ml) of water or as directed by healthcare professional.

Format

Capsules (60 capsules · 30 servings · 2 capsules daily with water).

Consistency

Use daily for a full 60-day evaluation window — covered by our money-back guarantee.

Why you'll love FLOW-4

Nitric Oxide helps support healthy circulation and muscle growth, making it a great addition to your fitness routine!

L-Arginine Alpha-Ketoglutarate promotes normal blood flow and nutrient delivery to muscles, supporting exercise performance.

L-Arginine Hydrochloride and L-Citrulline DL-Malate work together to support endurance and muscle function by helping your body produce nitric oxide.

With just 2 capsules a day, Nitric Oxide is a convenient way to support circulation, muscle recovery, and overall wellness!

Backed by our risk-free 60-day money-back guarantee + Free US shipping.

SEE THE NIGHTLY ROUTINE

Details

Nitric Oxide supports healthy circulation and promotes muscle growth, making it ideal for fitness and overall wellness. With key ingredients like L-Arginine Alpha-Ketoglutarate, L-Arginine Hydrochloride, and L-Citrulline DL-Malate, this supplement helps promote normal blood flow and endurance. Conveniently take 2 capsules a day to help support your body's performance and recovery. (60 capsules · 30 servings · 2 capsules daily with water).

How do I take FLOW-4?

Ingredients

How easy is FLOW-4 to take?

What Is Inside FLOW-4

60 capsules · 30 servings · 2 capsules daily with water. Full formula printed on the panel.

L-Citrulline DL-Malate

400 mg

Nitric Oxide helps support healthy circulation and muscle growth, making it a great addition to your fitness routine!

L-Arginine Hydrochloride

350 mg

L-Arginine Alpha-Ketoglutarate promotes normal blood flow and nutrient delivery to muscles, supporting exercise performance.

L-Arginine Alpha-Ketoglutarate

50 mg

L-Arginine Hydrochloride and L-Citrulline DL-Malate work together to support endurance and muscle function by helping your body produce nitric oxide.

Transparent Panel Labeling (Zero Hidden Fillers)

Active Component

With just 2 capsules a day, Nitric Oxide is a convenient way to support circulation, muscle recovery, and overall wellness!

Why they work together

Complete Formula

Designed for combining fast-acting L-Arginine HCl (350 mg) and L-Arginine AKG (50 mg) with sustained-release L-Citrulline DL-Malate (400 mg) in one coordinated routine.

Daily Directions

Capsules

As a dietary supplement adults take two (2) capsules daily. For best results, take with 6-8 oz (177-237ml) of water or as directed by healthcare professional.

Complete Formula Ingredients

Full Panel

L-Citrulline DL-Malate (400 mg), L-Arginine Hydrochloride (350 mg), L-Arginine Alpha-Ketoglutarate (50 mg), Vegetable Cellulose (Capsule), Brown Rice Flour.

What The Complete FLOW-4 Formula Brings To Your Day

Why each part of the formula matters, and how it fits into one simple habit.

What The Complete FLOW-4 Formula Brings To Your Day

Why each part of the formula matters, and how it fits into one simple habit.

Fitness Boost

Nitric Oxide helps support healthy circulation and muscle growth, making it a great addition to your fitness routine!

Power of L-Arginine

L-Arginine Alpha-Ketoglutarate promotes normal blood flow and nutrient delivery to muscles, supporting exercise performance.

Dynamic Duo

L-Arginine Hydrochloride and L-Citrulline DL-Malate work together to support endurance and muscle function by helping your body produce nitric oxide.

Easy Wellness

With just 2 capsules a day, Nitric Oxide is a convenient way to support circulation, muscle recovery, and overall wellness!

Full Label Transparency

Every ingredient is printed clearly on the panel so you can review it alongside your daily routine.

60-Day Money-Back Guarantee

Sixty full days to decide. Email us, get every penny back, and keep the bottle.

Your FLOW-4 Routine Roadmap What to do when

Illustrative routine guide. Individual results vary. Covered by our 60-day money-back guarantee.

Days 1–14

Lock in the daily cue

2 capsules daily with 6–8 oz of water. Keep your FLOW-4 bottle right where you will see it at the same time every day.

Days 15–30

Stay consistent

Daily formulas work through steady consistency, not sporadic mega-doses. Keep your daily serving going without skipping days.

Days 31–60

Evaluate with confidence

Compare how you feel against day one. Your 60-day guarantee covers your routine so you decide before you are out of pocket.

L-Citrulline Malate + Dual L-Arginine

Fitness Boost + Power of L-Arginine.

Transparent Panel

Complete formula printed clearly on the label.

Easy Capsules Format

60 capsules · 30 servings · 2 capsules daily with water.

Ships Free in the US

Free US shipping. 60-day guarantee, keep the bottle.

Short-Lived Arginine Spikes Or Continuous Nitric Oxide?

Basic arginine supplements dissolve rapidly in the digestive tract without reaching constricted peripheral capillaries. FLOW-4 fuels a continuous dual-stage nitric oxide cascade that keeps blood flowing effortlessly all day long.

Restore My Peripheral Circulation Now

FLOW-4

Plain L-Arginine Alone

L-Citrulline DL-Malate (400 mg)

L-Arginine Hydrochloride (350 mg)

L-Arginine Alpha-Ketoglutarate

Fitness Boost

Power of L-Arginine

Complete multi-factor synergy in one daily step

60-Day Money-Back Guarantee + Free US Shipping

Rated 4.8/5 based on +10,839 Total Ratings

Customer Reviews

See what our customers are saying about our products

Verified Buyer, 55, Verified Buyer

“Making FLOW-4 part of my daily routine has been effortless and effective.”

Verified Buyer, 55, Verified Buyer

“Making FLOW-4 part of my daily routine has been effortless and effective.”

Verified Buyer, 55, Verified Buyer

“Making FLOW-4 part of my daily routine has been effortless and effective.”

Verified Buyer, 55, Verified Buyer

“Making FLOW-4 part of my daily routine has been effortless and effective.”

Before the short-lived L-arginine powders, the cold hands and feet, the mid-workout fade

Why Adults Upgrade From Plain Arginine to FLOW-4

FLOW-4 pairs 400 mg L-Citrulline DL-Malate with 350 mg L-Arginine HCl and 50 mg L-Arginine Alpha-Ketoglutarate (AAKG) in 60 vegetable capsules (30 servings · 2 capsules daily with water).

Roger D., 60 Verified Buyer

Warm hands and feet plus better gym stamina

“My hands and feet used to stay ice-cold at my desk. Taking 2 capsules of FLOW-4 with water every morning keeps my circulation warm and gives me great stamina on evening walks.”

Alan P., 54 Verified Buyer

Dual L-Arginine + Citrulline Malate lasts all day

“Plain L-arginine wore off in an hour. Combining AAKG and Arginine HCl with 400 mg Citrulline Malate in 2 easy capsules with water gives me a clean, sustained nitric oxide wave.”

Marilyn T., 62 Verified Buyer

No gritty pre-workout drinks or artificial sweeteners

“I wanted nitric oxide vascular support without neon pre-workout powders or caffeine. Swallowing 2 FLOW-4 vegetable capsules with 8 oz of water each morning is clean and effortless.”

Dennis W., 57 Verified Buyer

Noticeable difference on hills and stair climbs

“Three weeks into taking 2 capsules daily with water before my morning walk, steep hills feel noticeably easier on my legs and breathing.”

Our Promise Try FLOW-4 For 60 Days. Keep The Bottle Either Way.

Use FLOW-4 daily (2 capsules daily with 6–8 oz of water). If it isn't the right fit for your routine within 60 days, email us for a full refund — no questions asked, and you keep the bottle. Free US shipping is included.

Restore My Peripheral Circulation Now

60-Day Guarantee

Free US Shipping

Keep The Bottle

Our Promise Try FLOW-4 For 60 Days. Keep The Bottle Either Way.

Restore My Peripheral Circulation Now

60-Day Guarantee

Free US Shipping

Keep The Bottle

Frequently Asked Questions

Straight answers before you start.

How do I take FLOW-4? +

As a dietary supplement adults take two (2) capsules daily. For best results, take with 6-8 oz (177-237ml) of water or as directed by healthcare professional. (60 capsules · 30 servings · 2 capsules daily with water).

How long until I notice a difference? +

Everyone is different and individual results vary. Daily wellness routines build through steady consistency, which is why every order of FLOW-4 is covered by a full 60-day money-back guarantee.

How is FLOW-4 different from plain l-arginine alone? +

Plain L-Arginine Alone typically focuses on a single angle. FLOW-4 is built around combining fast-acting L-Arginine HCl (350 mg) and L-Arginine AKG (50 mg) with sustained-release L-Citrulline DL-Malate (400 mg) so you don't have to juggle multiple separate products.

What are the full ingredients? +

Complete formula ingredients: L-Citrulline DL-Malate (400 mg), L-Arginine Hydrochloride (350 mg), L-Arginine Alpha-Ketoglutarate (50 mg), Vegetable Cellulose (Capsule), Brown Rice Flour.

How do the 1, 2, and 3-pack options work? +

You can choose 1 Bottle ($49.99 one-time / $39.99 Subscribe & Save), the Most Popular 2-Bottle Pack ($74.99 one-time / $59.99 Subscribe & Save), or the 3-Bottle Pack ($110.99 one-time / $89.99 Subscribe & Save). Subscribe & Save has zero commitment and can be paused or canceled anytime.

Can I use FLOW-4 alongside my current daily routine? +

Yes — FLOW-4 is designed to fit seamlessly into your existing daily routine. Review the full Supplement/Ingredient panel above to check overlap with anything else you take.

Should I check with my doctor first? +

Always consult your physician or healthcare professional before starting any new supplement or skincare routine, especially if you take prescription medication, are pregnant or nursing, or have a medical condition.

Where is the formula panel shown? +

The complete formula panel and directions are shown in the product image gallery at the top of this page and in the Ingredients tab above.

What are the refund and shipping terms? +

Free shipping anywhere in the US. Every order is backed by our 60-day money-back guarantee: email us within 60 days for a full refund, no questions asked, and keep the bottle.

How long until I notice a difference? +

Everyone is different and individual results vary. Daily wellness routines build through steady consistency, which is why every order of FLOW-4 is covered by a full 60-day money-back guarantee.

What are the full ingredients? +

Complete formula ingredients: L-Citrulline DL-Malate (400 mg), L-Arginine Hydrochloride (350 mg), L-Arginine Alpha-Ketoglutarate (50 mg), Vegetable Cellulose (Capsule), Brown Rice Flour.

Can I use FLOW-4 alongside my current daily routine? +

Yes — FLOW-4 is designed to fit seamlessly into your existing daily routine. Review the full Supplement/Ingredient panel above to check overlap with anything else you take.

Where is the formula panel shown? +

The complete formula panel and directions are shown in the product image gallery at the top of this page and in the Ingredients tab above.

60-Day Guarantee · Free US Shipping