Check Your Nitric Oxide Levels at Home in Seconds Berkeley Life Nitric Oxide Test Strips give you a simple, at-home way to see where your nitric oxide levels stand. Nitric oxide is essential for healthy circulation and blood flow, and levels naturally vary from person to person and tend to decline with age. With a quick saliva test, you get an easy color-coded reading in seconds — so you can track your status over time and know whether you may benefit from more support. Why You'll Love It Fast & simple — a quick saliva test gives a color-coded result in seconds, no lab required Track your levels — monitor your nitric oxide status over time, at home Know where you stand — see whether your levels are in a healthy range or could use support 50 strips per pack — plenty for regular at-home testing How to Use Follow the instructions on the package to test your saliva and compare the strip to the included color chart. These strips are intended for general wellness and informational use to help you track your nitric oxide levels — they are not a medical diagnostic device. For questions about your health, consult your healthcare practitioner. Want to support healthy nitric oxide levels? Pair your testing with Nitric Oxide Foundation tablets.