NITRIC OXIDE BOOSTER & CIRCULATION SUPPORT
30-day supply
Key Benefits
Supports nitric oxide production for blood flow
Promotes cardiovascular health
Supports exercise performance and recovery
May support healthy blood pressure
Wellness Goals
Recommended Dose
500mg
Take one 500mg capsule daily. For exercise performance, take 30-60 minutes before training. For cardiovascular support, consistent daily use is more important than timing. Can be taken with or without food.
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Doctor Formulated
cGMP Certified
The Details
Nitric oxide might be the most underappreciated molecule in your body. It's the signal that tells your blood vessels to relax and widen, improving blood flow to your heart, muscles, brain, and everywhere else. L-Arginine is the raw material your body uses to produce it.
For exercise enthusiasts, better blood flow means more oxygen and nutrients delivered to working muscles, improved endurance, and faster recovery. Studies show arginine supplementation can enhance exercise capacity, particularly during high-intensity efforts where blood flow becomes a limiting factor.
On the cardiovascular side, arginine supports healthy blood pressure by promoting vasodilation — the widening of blood vessels that reduces resistance to blood flow. Research has also shown benefits for circulation in people who spend long hours sitting. It's a foundational amino acid that keeps your vascular system running smoothly.
Research
Key studies supporting Arginine, from peer-reviewed journals.
Effect of L-arginine supplementation on blood pressure in adults: a systematic review and dose-response meta-analysis — 2022
The potential role of arginine supplements on erectile dysfunction: a systemic review and meta-analysis — 2019
Study titles are simplified for readability. Provided for informational purposes — not medical advice.
Transparency
Every batch is independently tested by ISO-17025 accredited labs for purity, potency, and contaminants.
Designed by healthcare professionals using evidence-based research and clinical expertise.
Manufactured in cGMP & UL certified, FDA-registered facilities with a flawless inspection record.
Important Information
Contraindications
If you take blood pressure medication, consult your healthcare provider before use, as arginine may enhance their effects.
As with any natural health product, consult your healthcare practitioner. Store in a cool, dry place. Keep out of reach of children. Discontinue use immediately if you experience an adverse event.
What people say
Really good supplement brand. The daily pack format is so convenient and I've been 100% consistent because of it. The quiz was genuinely thorough. Knocked one star off because I'd love the option to add or remove individual supplements as I learn more about my body.
I've tried so many supplements and honestly nothing has worked like this. The quiz is actually thorough and the results show it. Energy is UP, recovery is UP, sleep is SO much better. Can't believe it took me this long to find this brand.
Three weeks in and I already feel the difference. My morning energy is COMPLETELY different. No more dragging myself out of bed. The personalization through the quiz is what makes it work — it's not just a generic multivitamin. Stack actually thought about what MY body needs.
I've been on a health optimization journey for about three years and have tried what feels like every supplement brand on the market. Most of them are either generic multivitamins dressed up in pretty packaging, or they're so specific that you need to be a nutritionist to understand what you're actually taking. Stack sits in a completely different category. The quiz is the first thing that impressed me. It asks genuinely intelligent questions — not just 'how old are you and what's your gender' but questions about your diet, your sleep patterns, your stress levels, your exercise frequency. It felt like a real consultation rather than a data collection exercise. The pack that arrived was clearly personalized to my answers. After six weeks, the improvements have been consistent and measurable: better sleep quality, more stable energy throughout the day, and noticeably faster recovery after my runs. My partner commented that I seemed more 'on' in the evenings rather than crashing after dinner. The daily pack format is brilliant for compliance — I've been 100% consistent because the habit is so frictionless. One pack, done, every morning. No bottles, no measuring, no forgetting half of them. Genuinely one of the best health investments I've made.
My focus at work has been sharper and I'm waking up without that groggy feeling I used to have every morning. Told two friends about Stack already. Customer support was also really helpful when I had a question about one of the ingredients.
honestly wasn't sure about it at first but three weeks in and i'm so glad i tried it. energy is way better, i'm sleeping properly for the first time in months. the quiz was really detailed which gave me confidence it was actually personalized. would 100% recommend.
Personalized for you
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