Nitric Oxide Capsules
Nitric Oxide Capsules
★★★★★ (281)
- Dual Arginine Stack (A-AKG + HCl) — 1,000mg total per 2-capsule serving
- 60 Capsules Per Bottle — 30 full servings, 30-day supply
- Zero Sugar, Zero Carbs — clean capsule, no fillers
- Kosher, Gluten-Free, Non-GMO, No Coconut
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HOW TO TAKE IT
Time It Right, Feel The Difference.
Nitric oxide precursors work best when taken around training or physical activity. The timing window matters — here are the two approaches that get the most out of every capsule.
Pump more, push harder
L-Arginine and L-Citrulline are most effective when taken 30-45 minutes before training. They raise circulating nitric oxide levels right as your muscles need it most — improving blood flow, oxygen delivery, and muscle pump during your workout.
Take 2 capsules (full serving) 30-45 minutes before your workout with a full glass of water
Take on an empty or light stomach — heavy meals can slow absorption of amino acid compounds
Stay well hydrated — nitric oxide vasodilation increases fluid demand during training
Stack with creatine for maximum performance — the two compounds work through complementary pathways
Best for: athletes, gym-goers, and anyone who wants better pumps, endurance, and oxygen delivery during training.
Support heart health every day
For cardiovascular and blood pressure benefits, consistent daily use matters more than timing. Research shows L-Arginine and L-Citrulline taken consistently support endothelial function and healthy blood vessel tone over time — even on rest days.
Take 2 capsules daily at the same time each day — morning with breakfast works well for consistency
Allow 2-4 weeks of consistent use before expecting noticeable cardiovascular benefits
If you exercise, shift to the pre-workout protocol on training days for best of both approaches
Consult your doctor if you take blood pressure medication — nitric oxide compounds can amplify effects
Best for: cardiovascular health, daily energy, and those focused on long-term circulatory support rather than acute performance.
The Journey
The Big Difference Between Us vs Them
WHAT MAKES US DIFFERENT
Ingredients that earn their place.
No proprietary blends. No window dressing. Every ingredient in every formula is there because the evidence says it should be at the dose the evidence says it works.
L-Arginine 1,000mg
The direct precursor to nitric oxide. 1,000mg per serving to support vasodilation, blood flow, and muscle pump. Absorbed efficiently in capsule form for pre-workout use.
L-Citrulline Malate + L-Citrulline
L-Citrulline converts to arginine more efficiently than arginine alone. Malate form adds endurance support. Combined for a sustained nitric oxide effect that lasts through your training.
Beta Alanine + Clean Capsule
Beta alanine buffers lactic acid buildup - the burn that ends sets early. The tingling sensation is normal and confirms the dose is active. Clean capsule, no unnecessary additives.
The Journey
The Science Behind The Gummy
Enhances Blood Flow & Muscle Pump
L-Arginine is a direct precursor to nitric oxide — the molecule that signals blood vessels to relax and widen. Wider vessels mean more blood, oxygen, and nutrients reaching your muscles during training. Studies consistently show L-Arginine supplementation increases plasma nitric oxide and improves exercise blood flow.
L-Citrulline Malate for Endurance
L-Citrulline converts to L-Arginine in the kidneys more efficiently than supplemental L-Arginine alone — making the combination more effective than either compound individually. Research shows L-Citrulline Malate (2:1 ratio) reduces fatigue, improves reps to failure, and decreases post-workout muscle soreness.
Beta Alanine — Fight Muscle Fatigue
Beta Alanine increases muscle carnosine levels, which buffers the acid buildup that causes the burning sensation during high-intensity exercise. Clinical research shows it extends time to exhaustion in activities lasting 1-4 minutes and improves overall training volume over time.
Supports Cardiovascular Health
Beyond performance, nitric oxide plays a critical role in cardiovascular health. It helps regulate blood pressure by relaxing arterial walls, supports healthy endothelial function, and reduces oxidative stress in blood vessels. Studies show L-Arginine supplementation can meaningfully lower systolic blood pressure in healthy adults.
Full Label Transparency
Nothing Hidden.
Every Ingredient Named.
No priority blends. No "matrix" labels. What you see is exactly what's in every gummy — at the dose listed, nothing more, nothing less.
SUPPLEMENT FACTS
Serving Size: 2 Capsules • Servings Per Container: 30 • Total: 60 Capsules
* Daily Value (DV) not established.
Other Ingredients: Cellulose from Veggie Capsule, and Vegetable Magnesium Stearate.
Does not contain: Coconut
Free of: Gluten, Sugar, GMO, milk, eggs, fish, shellfish, tree nuts, peanuts, wheat, soybeans, and sesame.
*These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure or prevent any disease.
WHY THIS COMPOUND STACK?
Most nitric oxide supplements use a single arginine source. We use two — L-Arginine A-AKG for rapid uptake and L-Arginine HCl for sustained release — then add L-Citrulline Malate and free L-Citrulline to recycle arginine in the kidneys, keeping NO levels elevated longer than arginine alone can.
Beta Alanine rounds out the formula by targeting the separate fatigue pathway — muscle acid buffering. The result is a complete pre-workout stack targeting blood flow, oxygen delivery, and endurance simultaneously.
ALLERGEN & DIETARY INFORMATION
CUSTOMER REVIEWS
What People Are Saying
Nitric Oxide Capsules
Best pump I've ever had
"I've tried a lot of pre-workouts and nothing has given me a pump like this. Veins I didn't know I had. Two capsules 40 minutes before training and I'm locked in for the whole session."
Tyler M.
Verified Buyer
Nitric Oxide Capsules
No junk, just results
"Clean label, no artificial colors, no stimulants — exactly what I was looking for. I stack it with creatine and the difference in my endurance is real. I can push more reps before I hit the wall."
Rachel S.
Verified Buyer
Nitric Oxide Capsules
Noticeable from day one
"I felt the difference on my very first workout. Better blood flow, more energy, faster recovery. The tingling from the Beta Alanine threw me off at first but it completely went away after a week."
Kevin A.
Verified Buyer
Nitric Oxide Capsules
Works for cardio too
"I'm a runner, not a lifter. Started taking these before long runs and my cardiovascular endurance improved noticeably within two weeks. Less fatigue at mile 4-5 and faster recovery the day after."
Lisa C.
Verified Buyer
Nitric Oxide Capsules
Finally switched from powder
"I used to use a scoop-based NO supplement. Switched to these capsules and honestly prefer it — no mixing, no taste, no artificial sweeteners. Same results, way more convenient. Subscribed immediately."
Marcus D.
Verified Buyer
FAQ
What People Actually Want to Know.
Straight answers. No filter. If your question isn't here, email us at sales@4ywn.com and we'll answer within 24 hours.