Stimulant-free · Clinically studied

Your 3pm slump is a blood flow problem

Nitric oxide levels drop about 50% by age 40. Less nitric oxide means less blood flow, which shows up as afternoon fatigue and brain fog that another coffee only covers.

Rated 4.8 out of 5 stars, 2,000+ reviews

Sale price$41.99 Regular price$59.99

30% off your first order

Get 30% off my Starter Kit
  • Test strips included
  • 30-day money-back guarantee

What women 45 to 65 notice first

Verified buyers

No longer have afternoon fatigue

"I have only been taking it for a week, but I notice I have more energy for my afternoon workouts and don't have as much fatigue at 3 pm at work."

Ok ok ok THIS WORKS

"I have tried a lot of things and I can say I immediately felt better like just more energy and a better mood so it's pretty much the first thing I do after I eat breakfast."

Energy in a capsule

"I've had issues with my energy for many years, starting in my mid forties. After a lot of research and trial and error I've come across a few supplements that have made a real difference, and the Berkley Life product is one of them."

Nitric oxide

"Excellent product, I can feel the difference in my daily life with my memory and energy"

WHY 3PM FEELS LIKE THIS

Afternoon energy depends on how well blood moves

Blood carries oxygen and nutrients to your brain and muscles. Nitric oxide keeps blood vessels relaxed so that delivery keeps up through the day.

1

Nitric oxide drops with age

Your body makes about half as much by age 40.

2

Blood flow slows

Narrower vessels deliver less oxygen to your brain and muscles.

3

Energy runs low

That shows up as the 3pm dip, slower recovery and brain fog.

SOUND FAMILIAR

Midlife changes have a lot of moving parts

Tired by 3pm, even after a full night in bed

Hunting for words in the middle of a sentence

Sleep that leaves you feeling unrested

A second coffee that wears off by 4pm

Nitric Oxide Support · Results timeline

Your test strip shows the
change on day one. The rest
builds over 12 weeks.

The included saliva test strips let you check your nitric oxide levels at 
home, starting with your first dose. Here's what customers report at each
stage.

Shop Nitric Oxide Support

Day 1

The test strip moves after the first dose

Take two capsules and test your saliva with the included strip. Customers who started in the very low range report the strip reaching the target zone the same day, before they notice anything else.

  • Very low · before
  • Target · after

“Boom!”

“I had used the test strips in the past and they were consistently registering ‘very low’… My test strip went from very low to the target range after taking the capsules.”

Sheila W. · Verified Buyer

Weeks 1-3

Energy is the first thing people feel

By the end of week one, reviewers describe more energy through the day. Customers in their third week mention getting back to everyday things like cooking, cleaning and getting out of the house.

“I have more energy”

“I am on my third week of taking the Berkeley Life N.O. supplement… Since starting the N.O. I am now able to attend church, do my own cooking and cleaning. I plan to continue taking this!”

Kathleen S. · Verified Buyer

Weeks 4-7

Workouts start to feel easier

After about a month, customers report more stamina, easier breathing and less fatigue during hikes, bike rides, strength training and Pickleball. Better sleep comes up too.

“Positive Improvement!”

“I have especially noticed that when working out I have felt less fatigue, easier breathing and more stamina. I am 67 years old… we have only been taking the dietary N.O. for a little over a month.”

Theresa S. · Verified Buyer

Weeks 8-12

Blood flow and heart health, tracked over three months

Customers at the three-month mark describe better blood flow, and one reviewer tracked healthier blood pressure readings with their doctor over the same period. Keep testing to watch your levels hold.

“I've been using Berkeley Life Foundation's Nitric Oxide Support for about three months now… I’ve also experienced better blood pressure levels, something my doctor and I have been monitoring closely.”

Ion P.

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Individual results vary.

COFFEE VS. BLOOD FLOW

Coffee lifts you for a few hours. Blood flow keeps you steady.

More coffee
Nitric Oxide Support

HOW IT WORKS

Stimulates your nervous system

Supports nitric oxide and blood flow

HOW IT FEELS

A spike, then a crash

Steady through the afternoon

STIMULANTS

Caffeine

None, take it with or without coffee

SLEEP

Late cups can keep you up

Nothing in it to keep you awake

PROOF IT'S WORKING

You guess

A home test strip shows the change

OPTIONAL · BEETS VARY.
YOUR DOSE SHOULDN'T.

Nitrate in beets and greens changes with soil and season

The same studied dose in every capsule

MEASURE IT

See your levels before and after

Every Starter Kit includes test strips, so you can check your nitric oxide at home in 60 seconds.

1

TEST YOUR BASELINE.One strip, before your first dose.

2

TAKE 2 CAPSULES.With water, with or without food.

3

RETEST AT 90 MINUTES.Compare the color to your baseline.

Practitioner trusted
HSA/FSA eligible
Measurable with a home test strip

PROOF

Studied in clinical trials, recommended by practitioners

PRACTITIONERS

3,000+

healthcare practitioners recommend Berkeley Life to their patients.

307 clinicians share Berkeley Life on FrontrowMD without compensation.

MEDICAL ADVISORY BOARD

4 clinical specialists review every Berkeley Life formula. Reuse Advisory Board component.

DR. MARIZA
SNYDER

Women's hormone health & healthy aging

DR. HAROLDO
MAGARIÑOS

Oral-gut microbiome & preventive care

DR. DEBRA
DURST

Women's health longevity & hormone optimization

DR. NAVAZ
HABIB

Vagus nerve function & Nitric Oxide optimization

*Published clinical trials. Results among clinical trial subjects.

FAQ

Common
questions

No. Nitric Oxide Support is stimulant-free, so you can take it with your morning coffee or in place of your afternoon one.

Your test strip can show a change 90 minutes after your first 2 capsules. Reviewers most often mention more energy within the first one to four weeks of daily use.

It works alongside most daily supplements. If you take prescription medication, including blood pressure medication, check with your doctor before you start.

Yes. You can pause or cancel a subscription from your account at any time, with no fees.

Every order comes with a 30-day money-back guarantee. Contact our team and we will refund your purchase.

Blood flow first.

Get through 3pm on
better blood flow

NO Starter Kit · $41.99 with 30% off your first order

30-day money-back guarantee

Trusted By Real Experts.Everywhere

4.7
Rated 4.7 out of 5 stars
Based on 367 reviews
92%would recommend these products
Slide 1 selected
367 reviews
  • LT
    Lorna T.
    Verified Buyer
    Reviewing
    Nitric Oxide Support
    How old are you? 55-64
    What is your gender? Female
    Category Energy, Heart Health, Circulation, Performance, Menopause Support
    Rated 3 out of 5 stars
    5 days ago
    Too early to tell.

    Only been taking for a week. I believe it is too early to tell. Will review again at a later date if I feel an improvement.

    BL Profile picture for Berkeley Life
    Berkeley Life
    4 days ago

    Thank you for sharing your feedback, Lorna. I really appreciate your honesty and your realistic approach to tracking your experience with Nitric Oxide Support.

    A week is still very early in the process, and it sounds like you're being thoughtful about giving the product time to work. Most people need several weeks of consistent use to notice meaningful changes, so your timeline is completely understandable.

    If you do decide to continue using the product and notice improvements down the road, we'd love to hear about your experience. Your feedback helps us understand how Nitric Oxide Support is working for our customers over time.

    Thank you for giving us a try, and we appreciate you taking the time to share your thoughts!

  • HS
    Howard S.
    Verified Buyer
    Reviewing
    Nitric Oxide Support
    I do not recommend this product
    How old are you? Over 65
    What is your gender? Male
    Category Energy, Sexual Health, Performance, Circulation, Heart Health
    Rated 1 out of 5 stars
    2 weeks ago
    Nitrous Oxide

    I see no difference at all.

    BL Profile picture for Berkeley Life
    Berkeley Life
    2 weeks ago

    Thank you for taking the time to share your feedback, Howard. I appreciate you giving Nitric Oxide Support a try and being honest about your experience.

    I'm sorry to hear you haven't noticed a difference yet. It would be helpful to know a bit more about your experience—specifically, how long you've been using the product and whether you've been taking it consistently. Many people need several weeks to months of regular use to notice changes, and consistency plays an important role in how the product may work for you.

    If you have any questions about the product or your experience with it, please feel free to reach out to us at help@berkeleylife.com. We're here to help and would love to learn more about what you're looking for.

    Thank you again for giving us a try, and we appreciate your feedback.

  • DS
    Debbie S. T.
    Verified Buyer
    Reviewing
    Nitric Oxide Support
    I recommend this product
    How old are you? 55-64
    What is your gender? Female
    Category Energy, Heart Health, Gut Health, Performance, Circulation
    Rated 5 out of 5 stars
    2 weeks ago
    2 weeks In-Feeling the difference

    I got two bottles to start so my husband and I could both try this! We both feel more energetic and alert! Going to order a refill for us both!

    BL Profile picture for Berkeley Life
    Berkeley Life
    2 weeks ago

    Thank you so much for sharing your wonderful experience with Nitric Oxide Support, Debbie! We're absolutely thrilled to hear that both you and your husband are already feeling more energetic and alert just two weeks in. It's so special when you can share a health and wellness journey together as a couple — there's nothing quite like having that support from your loved one! We're so grateful that Nitric Oxide Support is making such a positive difference for you both, and we truly appreciate your loyalty in ordering a refill. Thank you for being part of the Berkeley Life community!

  • RM
    richard m.
    Verified Buyer
    Reviewing
    Sample Pack - 3 Day
    How old are you? 55-64
    What is your gender? Male
    Category Energy, Performance
    Rated 3 out of 5 stars
    3 weeks ago
    Too soon to tell

    day 5….. no noticeable effect yet

    BL Profile picture for Berkeley Life
    Berkeley Life
    2 weeks ago

    Thank you for sharing your feedback, Richard. I appreciate you giving the sample pack a try and tracking your experience.

    Day 5 is still very early in the process, and it sounds like you're being realistic about what to expect from a short trial period. The 3-day sample pack is really designed to give you a feel for the product rather than deliver significant results, so your timeline aligns with what we'd typically expect.

    Most people need several weeks of consistent use to notice meaningful changes, so if you do decide to continue with a longer course, that would give you a better window for evaluating how the product works for you.

    You can always reach out to us at help@berkeleylife.com for more assistance or education.

    Thank you for taking the time to share your honest feedback, and we appreciate you giving us a try!

  • AE
    Anna E. M.
    Verified Buyer
    Reviewing
    Nitric Oxide Support
    I do not recommend this product
    How old are you? 55-64
    What is your gender? Female
    Category Energy, Gut Health, Menopause Support, Circulation, Performance
    Rated 1 out of 5 stars
    3 weeks ago
    Stomach Upset

    I tried it for two days, taking it with food; however, experienced stomach upset. Any suggestions?

    BL Profile picture for Berkeley Life
    Berkeley Life
    3 weeks ago

    Thank you for sharing your experience, Anna. While Berkeley Life is generally well tolerated, everyone can respond differently to a dietary supplement.

    Our recommended serving is two capsules daily with water, preferably after a meal. If you experienced stomach upset taking both capsules together, you could try splitting the serving—one capsule in the morning and one in the evening—to see if that is better tolerated.

    If the stomach upset continues, we recommend discontinuing use and speaking with your healthcare provider before trying it again, particularly if you have any underlying medical conditions or take medications.

    Please let me know if you have any other questions or concerns!