More Blood Flow Is the Cheat Code. Here's How to Prove It Works. If you want to get fitter or go faster, there's one thing that always works: more blood flow. More blood means more oxygen. More oxygen means you can push harder before your body taps out. Real studies show a 4% or greater performance increase — and athletes who aren't yet at peak fitness can see up to 20%. This 5-day sample pack exists so you can find out exactly where you fall before committing to a full bottle. SwissRX Nitric Oxide Pro is built on Noxa24, a patented blend featuring black garlic extract, that keeps your nitric oxide levels elevated for a full 24 hours with just two capsules a day. What Makes It Different 24-Hour Coverage, Not a 2-Hour Window The original Nitric Oxide formula boosts NO production for 2–5 hours. The PRO formula reaches peak levels at 2 hours and holds them for a full 24 hours. Two capsules in the morning and you're covered all day — no re-dosing, no timing stress. You Can Actually See It Working Three saliva test strips are included. Hold one under your tongue for 5 seconds before your first dose — that's your baseline. Test again after 60 minutes. In our testing, strips went from near-zero (off-white) to deep purple within two hours. Very few supplements let you watch them work in real time. Multiple Pathways, One Goal Noxa24 activates several nitric oxide production pathways at once — including one that runs through your saliva, where nitrates interact with natural bacteria in your mouth to convert to NO. Skip the mouthwash while you're running this trial — you'll kill the bacteria you need. Here's what more nitric oxide actually means during training: your arteries widen, oxygen-rich blood reaches working muscles faster, and you delay the point where lactic acid accumulates and your body starts to slow down. Your legs burn less at threshold. Recovery between hard efforts happens faster. You hold power longer before cracking — and in controlled interval testing, that translated to nearly 20 seconds per mile of improvement over two weeks. How to Use It 1. Test your baseline first: Before your first capsule, use a test strip to establish your starting NO level. 2. Take two capsules every morning: Timing relative to your workout is flexible — it works for 24 hours, so consistency matters more than precision. 3. Retest at 60 minutes: Avoid fluids in that 60-minute window for the most accurate strip reading. Dr. Kevin Sprouse, Head of Medicine for EF Education First Pro Cycling, recommends Nitric Oxide Pro not just for performance but for daily cardiovascular health, particularly for athletes over 50. Five days is enough time to feel it working. The test strips are there to prove it isn't a placebo. This isn't a trial pack designed to get you hooked. It's five days of real-world testing with the data to back it up.
