Product Description
Most supplements ask you to trust the process. Berkeley Life gives you proof. If you're using any nitric oxide supplement — whether it's beet root, a NO booster, or Berkley Life product — these test strips tell you in 15 seconds whether your levels are actually where they need to be. That's not a small thing. Nitric oxide is the molecule that keeps your blood vessels relaxed and open, delivering oxygen and nutrients to working muscles. But you can't feel it working. Until now, you just had to hope.
Berkeley Life Nitric Oxide Test Strips are patented, saliva-based indicators that measure salivary nitrite levels — the proven precursor to nitric oxide in the bloodstream. Clinical research has confirmed that strip readings closely mirror nitric oxide trends found in blood plasma, which means you're getting a real signal, not a rough guess.
Each tube contains 25 individually sealed strips — a month of regular testing at daily use. The process takes 15 seconds: place the strip on your tongue for 5 seconds, fold it in half and press gently for 10, then unfold and match the color to the scale on the package. Green means your levels are in a good range. If they're not, you know to adjust — more nitrate-rich foods, a supplement dose, or a timing change before your next effort.
How to Use Berkeley Life Nitric Oxide Test Strips
Establish your baseline: Test first thing in the morning before eating or drinking anything. This gives you your starting point and shows where your levels sit before any intervention.
Test around supplementation: Take a reading before and 90 minutes after your nitric oxide supplement to confirm it's working. If levels don't shift, it's a signal to adjust your dose or timing.
Test before training: Use a strip 60–90 minutes before a key workout or race to confirm your NO levels are elevated. Don't experiment on race day — know your protocol works before it matters.
Important: Don't eat, drink, or use mouthwash for at least 10 minutes before testing. Antiseptic mouthwash is particularly disruptive — it kills the oral bacteria that help convert dietary nitrates into nitrite, which can falsely suppress your reading.
Supplement Facts
| Amount Per Serving | ||
|---|---|---|
| % Daily Value* |
* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
** Daily Value (DV) not established
Always Happy Promise: Don't like a product? Tell us within 30 days of receipt and we'll make it right and make you happy. Here at The Feed, we want you to love your experience and the sports nutrition products you purchase. If, for any reason, you are not satisfied with your nutrition specific purchase, tell us.
We do not accept returns on food items that have been opened, but we will issue a store credit if you are unsatisfied. In the event of a return, you must first contact us before sending back a return shipment.
Consumable products over $40 receive a 50% store credit. This includes specialty nutrition products such as ketones or supplements/vitamins.
Berkeley Life Test Strip Tube FAQ's
Everything you need to know about Berkeley Life Test Strip Tube.
The strips measure salivary nitrite levels using the Griess reaction — an established analytical chemistry method that detects nitrite in saliva. Salivary nitrite is a validated indicator of nitric oxide pathway activity, and in Berkeley Life's own double-blind, placebo-controlled clinical trial, strip readings correlated directly with plasma nitrite measurements in the lab.
Place the strip on your tongue with the "saliva here" side facing down and hold for 5 seconds. Fold the strip in half, pressing the sides together gently for 10 seconds. Then unfold and compare the color to the Nitric Oxide Scale on the package. The whole process takes 15 seconds.
Each tube contains 25 individually sealed strips — enough for approximately one month of daily testing. Berkeley Life recommends testing daily for the first 30 days to establish your baseline, then weekly once your levels improve. Athletes monitoring pre-training protocols may test more frequently.
Test first thing in the morning before eating or drinking to establish your baseline. For supplementation tracking, test before your dose and again 90 minutes after taking your nitric oxide supplement. For training, test 60–90 minutes before a key workout or race to confirm your levels are where they need to be.
Several factors can suppress readings: oral microbiome imbalance, recent antibiotic use, antibacterial mouthwash, high oxidative stress, or genetic variations in nitrate conversion. Consistent daily supplementation for 30–60 days may help rebuild nitrate reserves. Berkeley Life also recommends their Prebiotic Nitrate Gum to help restore the oral bacteria needed for optimal nitric oxide conversion.