Why test
By around 40, most adults make roughly half the nitric oxide they did at 20. The strips show you where you are. Ultimate 4 helps you move.
The proof loop
The daily foundation
Both nitric oxide pathways plus antioxidant protection. 33 serves.
Your proof
Saliva strips with a colour chart. Results in about 15 seconds.
Don't guess. Test. It's the only way to know.
Jeff tests his own levels regularly and recommends starting with a baseline.
Overall rating: 4.9 / 5 from 62 reviews.
I love the Ultimate 4, its given me loads more energy, reduced inflammation in lower back with little to no back ache. Has improved circulation to my whole body
I am now on my 3rd order of Boost 3, ultimate 4 and the Testosterone TRx. I have noticeably more energy, less joint pain and I’m sleeping a lot better. I still get the occasional night sweat but it’s no longer every night. And my sleep score is now regularly above 90. I am 54 and hitting menopause.
Jeff’s Ultimate 4 and Boost have been game changers for my husband and I. We’ve been on them both for a month and our energy levels have gone through the roof! I’ve been dancing through the day like a little kid. No need for caffeine anymore 🙏😊
Only been using Ultimate 4 for 10 days now and I do feel like I have more energy. The test strips started off almost white but happy to say they are now registering slightly pink which means it’s working Woo Hoo 🙌
I knew Jeff designed good products because years ago I relied on 30 plus for women, so when I saw he had nitric oxide, I had to try it. I’ve been using it for two weeks and I certainly have more energy and sleep better, the arthritis in my knee has changed. I will keep using it
So far, so good...seeing immediate results.
I am amazed at how quickly my energy increased. I have been having B12 shots every 3mths for years with no real benefit. Ultimate 4 helped after only a few days and it tastes great.
Taste great , levels increased within a week & could definitely feel the increase in energy , almost too much energy after 2 weeks on it, so I reduced my dose to every 3rd day
I love the flavour, it’s not overly sweet. I’m on my second jar and feeling more energetic and less brain fog.
Love the Boost 3 & Ultimate 4 mixed together, it’s so refreshing. I look forward to it every day. I’m yet to see noticeable results of the Trx yet, but it’s only been a few weeks.
I’ve tried plenty of supplements over the years, but this is honestly the best I’ve taken! I took it to Europe with me & noticed a difference almost immediately. I had more energy, felt amazing & didn’t get sick once during the trip. When I got home, I ran out while waiting for my next order. After five days without it, I could really notice the difference in how I felt. I’m back on it now & so impressed I’m getting the whole family started! Cannot recommend it enough. Six stars if I could!
Taking the ultimate 4 and boost 3 and have never felt better. Loads of energy and i have had no coldsore outbreaks at all. Hubby 's blood pressure has improved and has also noticed more energy 100% recommend these products
My husband and I are 70 and 64 respectively and whilst we are still building our NO levels due to our age and other health factors we are thrilled to be experiencing a great improvement in our energy levels. No longer hitting a brick wall mid afternoon is just fantastic. We feel we are getting the opportunity to age better!
excellent product
excellent product
excellent product
Love it - definitely feeling more energised. Cant seem to get a good reading on the nitric test strips but I do feel better. I think i may need to add the boost to complement on my next order
love how quickly received my order but i think it should require a signature and not left if not home
the best product out there never felt so good ❤️❤️
Love the feeling of clarity and more energy throughout the day.
My name is Sheryl Ogston I am 75 years old, my daughter Rochelle gave me the ultimate 4 and boost 3 for my birthday, I have been talking it for a month now. I am feeling great, more energy, brain fog better, just feeling better all round and my nitric oxide levels are up to 110mg/L. I have been telling everyone I know to get onto it. Thanks Jeff for such great products.
So far one tub and energy more consistent. Took overseas whilst conquering the streets of Japan! Definitely needed! Purchased my second tub and will test more with this one to check NO levels
I noticed a difference in my energy levels & the flow on effect was my mood, within days of starting this. I can’t wait to see the long term effects it has.
2nd tub just started and enjoying the taste and easy of mixing the drink of a morning. Starting to feel my energy increasing. Sleeping better and not needing to hit the snooze button on my alarm 😄 Following Jeff's recommendations with diet and exercise and looking forward to feeling fantastic again
I’m starting to get back my energy it’s a good feeling.
Great product
Great products
We are enjoying the products
Love this product! Energy levels are through the roof. Will never want to be without it!
Since taking Boost 3 and Ultimate 4 for the last 2 weeks, I feel I have more motivation to get up and do things.
generally feeling a better self
Energy levels noticeably better. Looking forward to more positive results as I build my NO levels up. Thanks Jeff, another fantastic product.
NO levels have definitely improved after 3 weeks
Energy improving thanks to this addition in my health routine :)
Whilst it is too early to show an increase in my nitric oxide readings as I’ve only been taking this product for a few weeks, I definitely have more energy and improved brain function.
the extra energy and focus is amazing
I was taking the women’s bundle for a month. Felt the benefits almost immediately. Unfortunately due to postage, my recent order got lost. I didn’t have anything for 3 weeks. Extremely disappointed, but I just had to be patient. My order finally arrived a few days ago and hands down, the best feeling! I actually think in hindsight the few weeks without these amazing products actually proved to me how good they really are. I Feel AMAZING! Thank you Jeff…. Long may this last🙏🏻
Have been using for about a month now and feeling great, feel like i have more energy and not having the afternoon slump.
Feel more energised and pee less at night!
great product with real ingredients. It really does give you a boost in your step. Thanks Jeff
Not sure where to start?
Jeff's free assessment takes about five minutes and shows which foundation to work on first.
Clear, honest answers. Still unsure? Take the free assessment and join the community.
Place saliva on the pad, wait 10 to 20 seconds and compare with the colour chart. Deeper pink means higher nitric oxide. Test in the morning before eating or brushing.
Two to three times a week when you start, then weekly once you're in range.
Most people can, but if you take prescription medication or manage a health condition, check with your healthcare provider before starting a new supplement.
You save 10% on every order and it arrives monthly. You can skip, change or cancel any time from your account. No lock-in.
Once you've ordered, log in to your account to read The Butterworth Protocols as a flipbook or download the PDF. The Nitric Oxide Kitchen eating guide is emailed to you.